10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

x	QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
	For the quarterly period ended March 31, 2016
	OR
¨	TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from _______ to ______

Commission file number 1-10804

XL GROUP

Public Limited Company

(Exact name of registrant as specified in its charter)

Ireland	98-0665416
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)

XL House, 8 St. Stephen's Green, Dublin 2, Ireland

(Address of principal executive offices and zip code)

+353 (1) 400-5500

(Registrant’s telephone number, including area code)

Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes x No ¨

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files). Yes x No ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer or a smaller reporting company. See the definitions of "large accelerated filer" "accelerated filer" and "smaller reporting company" in Rule 12b-2 of the Exchange Act. (Check one):

Large accelerated filer x Accelerated filer ¨ Non-accelerated filer ¨ Smaller reporting company ¨

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ¨ No x

As of May 3, 2016, there were 284,669,984 outstanding Ordinary Shares, $0.01 par value per share, of the registrant.

XL GROUP PLC

INDEX TO FORM 10-Q

		Page No.
	PART I—FINANCIAL INFORMATION
Item 1.	Financial Statements:
	Unaudited Consolidated Balance Sheets at March 31, 2016 and December 31, 2015	1
	Unaudited Consolidated Statements of Income for the Three Months Ended March 31, 2016 and 2015	2
	Unaudited Consolidated Statements of Comprehensive Income for the Three Months Ended March 31, 2016 and 2015	3
	Unaudited Consolidated Statements of Shareholders’ Equity for the Three Months Ended March 31, 2016 and 2015	4
	Unaudited Consolidated Statements of Cash Flows for the Three Months Ended March 31, 2016 and 2015	5
	Notes to Unaudited Consolidated Financial Statements	6
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	41
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	72
Item 4.	Controls and Procedures	78
	PART II—OTHER INFORMATION
Item 1.	Legal Proceedings	79
Item 1A.	Risk Factors	79
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	81
Item 6.	Exhibits	82
	Signatures	83

PART I – FINANCIAL INFORMATION

ITEM 1. FINANCIAL STATEMENTS

XL GROUP PLC

UNAUDITED CONSOLIDATED BALANCE SHEETS

(U.S. dollars in thousands, except share data)	March 31, 2016		December 31, 2015
ASSETS
Investments:
Fixed maturities, at fair value (amortized cost: 2016 - $31,444,747; 2015 - $31,517,654)	$	32,647,573	$	32,257,589
Equity securities, at fair value (cost: 2016 - $831,543; 2015 - $834,079)	878,407		878,919
Short-term investments, at fair value (amortized cost: 2016 - $317,939; 2015 - $618,851)	317,304		617,390
Total investments available for sale	$	33,843,284	$	33,753,898
Fixed maturities, at fair value (amortized cost: 2016 - $1,367,908; 2015 - $1,263,609)	$	1,409,583	$	1,235,699
Short-term investments, at fair value (amortized cost: 2016 - $26,949; 2015 - $60,176)	26,959		60,330
Total investments, trading	$	1,436,542	$	1,296,029
Investments in affiliates	1,953,711		1,708,899
Other investments	1,453,890		1,433,057
Total investments	$	38,687,427	$	38,191,883
Cash and cash equivalents	2,820,897		3,256,236
Restricted cash	161,019		154,992
Accrued investment income	291,016		312,667
Deferred acquisition costs and value of business acquired	1,057,941		890,568
Ceded unearned premiums	2,255,664		1,821,793
Premiums receivable	6,041,000		4,712,493
Reinsurance balances receivable	469,009		418,666
Unpaid losses and loss expenses recoverable	5,374,604		5,262,706
Receivable from investments sold	65,471		231,158
Goodwill and other intangible assets	2,233,597		2,210,266
Deferred tax asset	245,927		282,311
Other assets	942,120		937,199
Total assets	$	60,645,692	$	58,682,938
LIABILITIES AND SHAREHOLDERS’ EQUITY
Liabilities:
Unpaid losses and loss expenses	$	25,913,484	$	25,439,744
Deposit liabilities	1,170,595		1,168,376
Future policy benefit reserves	4,020,602		4,163,500
Funds withheld on GreyCastle life retrocession arrangements (net of future policy benefit reserves recoverable: 2016 - $3,574,716; 2015 - $3,719,131)	998,391		914,629
Unearned premiums	8,217,539		7,043,358
Notes payable and debt	2,653,895		2,644,970
Reinsurance balances payable	2,583,962		2,117,727
Payable for investments purchased	74,476		130,060
Deferred tax liability	105,589		120,651
Other liabilities	1,239,441		1,285,460
Total liabilities	$	46,977,974	$	45,028,475
Commitments and Contingencies
Shareholders’ Equity:
Ordinary shares, 999,990,000 authorized, par value $0.01; issued and outstanding (2016 - 286,273,358; 2015 - 294,745,045)	$	2,863	$	2,947
Additional paid in capital	8,608,726		8,910,167
Accumulated other comprehensive income	1,094,557		686,616
Retained earnings	1,982,598		2,077,349
Shareholders’ equity attributable to XL Group plc	$	11,688,744	$	11,677,079
Non-controlling interest in equity of consolidated subsidiaries	1,978,974		1,977,384
Total shareholders’ equity	$	13,667,718	$	13,654,463
Total liabilities and shareholders’ equity	$	60,645,692	$	58,682,938

See accompanying Notes to Unaudited Consolidated Financial Statements

1

XL GROUP PLC

UNAUDITED CONSOLIDATED STATEMENTS OF INCOME

	Three Months Ended
	March 31,
(U.S. dollars in thousands, except per share data)	2016			2015
Revenues:
Net premiums earned	$	2,354,610		$	1,334,000
Net investment income:
Net investment income - excluding Life Funds Withheld Assets	164,326			158,094
Net investment income - Life Funds Withheld Assets	41,560			50,419
Total net investment income	$	205,886		$	208,513
Net realized gains (losses) on investments, and net unrealized gains (losses) on investments, trading ("Trading") - Life Funds Withheld Assets:
Net realized gains (losses) on investments sold - excluding Life Funds Withheld Assets	11,164			15,178
Other-than-temporary impairments ("OTTI") on investments - excluding Life Funds Withheld Assets	(19,582		)	(10,515		)
OTTI on investments transferred to (from) other comprehensive income - excluding Life Funds Withheld Assets	2			(61		)
Net realized gains (losses) on investments sold - Life Funds Withheld Assets	34,416			52,738
OTTI on investments - Life Funds Withheld Assets	(2,346		)	(5,209		)
Net unrealized gains (losses) on investments, Trading - Life Funds Withheld Assets	69,096			760
Total net realized gains (losses) on investments, and net unrealized gains (losses) on investments, trading - Life Funds Withheld Assets	$	92,750		$	52,891
Net realized and unrealized gains (losses) on derivative instruments	(3,622		)	16,521
Net realized and unrealized gains (losses) on life retrocession embedded derivative and derivative instruments - Life Funds Withheld Assets	(236,080		)	(229,367		)
Income (loss) from investment fund affiliates	(4,579		)	35,329
Fee income and other	8,262			4,728
Total revenues	$	2,417,227		$	1,422,615
Expenses:
Net losses and loss expenses incurred	$	1,382,485		$	769,827
Claims and policy benefits	4,937			19,387
Acquisition costs	403,267			153,696
Operating expenses	515,381			325,656
Foreign exchange (gains) losses	(33,819		)	27,390
Interest expense	52,303			51,438
Total expenses	$	2,324,554		$	1,347,394
Income (loss) before income tax and income (loss) from operating affiliates	$	92,673		$	75,221
Income (loss) from operating affiliates	12,650			22,668
Provision (benefit) for income tax	22,295			24,218
Net income (loss)	$	83,028		$	73,671
Non-controlling interests	61,143			37,390
Net income (loss) attributable to ordinary shareholders	$	21,885		$	36,281
Weighted average ordinary shares and ordinary share equivalents outstanding, in thousands – basic	291,969			255,724
Weighted average ordinary shares and ordinary share equivalents outstanding, in thousands – diluted	296,666			260,704
Earnings (loss) per ordinary share and ordinary share equivalent – basic	$	0.07		$	0.14
Earnings (loss) per ordinary share and ordinary share equivalent – diluted	$	0.07		$	0.14

See accompanying Notes to Unaudited Consolidated Financial Statements

2

XL GROUP PLC

UNAUDITED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

	Three Months Ended
	March 31,
(U.S. dollars in thousands)	2016			2015
Net income (loss) attributable to ordinary shareholders	$	21,885		$	36,281
Change in net unrealized gains (losses) on investments - excluding Life Funds Withheld Assets, net of tax	363,883			60,345
Change in adjustments related to future policy benefit reserves, net of tax	17,035			60,356
Change in net unrealized gains (losses) on investments - Life Funds Withheld Assets, net of tax	51,990			37,115
Change in net unrealized gains (losses) on affiliate and other investments, net of tax	(9,707		)	15,865
Change in OTTI losses recognized in other comprehensive income, net of tax	2,267			9,858
Change in underfunded pension liability, net of tax	(1,049		)	975
Change in value of cash flow hedge	(39		)	95
Foreign currency translation adjustments, net of tax	(16,439		)	36,103
Comprehensive income (loss)	$	429,826		$	256,993

See accompanying Notes to Unaudited Consolidated Financial Statements

3

XL GROUP PLC

UNAUDITED CONSOLIDATED STATEMENTS OF SHAREHOLDERS’ EQUITY

	Three Months Ended
	March 31,
(U.S. dollars in thousands)	2016			2015
Ordinary Shares:
Balance - beginning of year	$	2,947		$	2,552
Issuance of ordinary shares	15			15
Buybacks of ordinary shares	(99		)	(1		)
Exercise of stock options	—			1
Balance - end of period	$	2,863		$	2,567
Additional Paid in Capital:
Balance - beginning of year	$	8,910,167		$	7,359,102
Issuance of ordinary shares	7			6
Buybacks of ordinary shares	(301,354		)	(1,573		)
Exercise of stock options	490			1,771
Share-based compensation	(584		)	1,832
Balance - end of period	$	8,608,726		$	7,361,138
Accumulated Other Comprehensive Income (Loss):
Balance - beginning of year	$	686,616		$	1,484,458
Change in net unrealized gains (losses) on investments - excluding Life Funds Withheld Assets, net of tax	363,883			60,345
Change in adjustments related to future policy benefit reserves, net of tax	17,035			60,356
Change in net unrealized gains (losses) on investments - Life Funds Withheld Assets, net of tax	51,990			37,115
Change in net unrealized gains (losses) on affiliate and other investments, net of tax	(9,707		)	15,865
Change in OTTI losses recognized in other comprehensive income, net of tax	2,267			9,858
Change in underfunded pension liability, net of tax	(1,049		)	975
Change in value of cash flow hedge	(39		)	95
Foreign currency translation adjustments, net of tax	(16,439		)	36,103
Balance - end of period	$	1,094,557		$	1,705,170
Retained Earnings (Deficit):
Balance - beginning of year	$	2,077,349		$	1,187,639
Net income (loss) attributable to ordinary shareholders	21,885			36,281
Dividends on ordinary shares	(58,714		)	(41,599		)
Buybacks of ordinary shares	(54,447		)	(393		)
Share-based compensation	(3,475		)	(6,746		)
Balance - end of period	$	1,982,598		$	1,175,182
Non-controlling Interest in Equity of Consolidated Subsidiaries:
Balance - beginning of year	$	1,977,384		$	1,402,015
Non-controlling interests - contributions	882			2,569
Non-controlling interests - distributions	(3,030		)	(4,175		)
Non-controlling interests	3,679			1,957
Non-controlling interest share in change in accumulated other comprehensive income (loss)	59			—
Balance - end of period	$	1,978,974		$	1,402,366
Total Shareholders’ Equity	$	13,667,718		$	11,646,423

See accompanying Notes to Unaudited Consolidated Financial Statements

4

-XL GROUP PLC

UNAUDITED CONSOLIDATED STATEMENTS OF CASH FLOWS

	Three Months Ended
	March 31,
(U.S. dollars in thousands)	2016			2015
Cash flows provided by (used in) operating activities:
Net income (loss)	$	83,028		$	73,671
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Total net realized (gains) losses on investments and net unrealized (gains) losses on investments, Trading - Life Funds Withheld Assets	(92,750		)	(52,891		)
Net realized and unrealized (gains) losses on derivative instruments	3,622			(16,521		)
Net realized and unrealized (gains) losses on life retrocession embedded derivative and derivative instruments - Life Funds Withheld Assets	236,080			229,367
Amortization of premiums (discounts) on fixed maturities	47,505			35,998
(Income) loss from investment and operating affiliates	19,797			(45,467		)
Share-based compensation	20,707			18,295
Depreciation and amortization	22,592			10,907
Accretion of deposit liabilities	12,055			10,044
Changes in:
Unpaid losses and loss expenses	330,160			77,832
Future policy benefit reserves	(59,858		)	(49,279		)
Funds withheld on GreyCastle life retrocession arrangements, net	(121,272		)	(169,569		)
Unearned premiums	1,148,149			655,733
Premiums receivable	(1,322,085		)	(517,881		)
Unpaid losses and loss expenses recoverable	(82,729		)	(148,962		)
Ceded unearned premiums	(436,332		)	(146,049		)
Reinsurance balances receivable	(49,781		)	10,057
Deferred acquisition costs and value of business acquired	(156,373		)	(72,340		)
Reinsurance balances payable	460,982			84,261
Deferred tax asset - net	(7,945		)	14,119
Derivatives	17,863			141,754
Other assets	(47,084		)	(31,407		)
Other liabilities	(155,826		)	(94,545		)
Other	(41,618		)	17,851
Total adjustments	$	(254,141	)	$	(38,693	)
Net cash provided by (used in) operating activities	$	(171,113	)	$	34,978
Cash flows provided by (used in) investing activities:
Proceeds from sale of fixed maturities and short-term investments	$	3,772,077		$	1,473,941
Proceeds from redemption of fixed maturities and short-term investments	949,221			1,053,739
Proceeds from sale of equity securities	62,895			189,473
Purchases of fixed maturities and short-term investments	(4,325,679		)	(2,835,304		)
Purchases of equity securities	(55,411		)	(94,141		)
Proceeds from sale of affiliates	41,538			77,916
Purchases of affiliates	(247,049		)	(29,037		)
Purchase of Allied International Holdings, Inc., net of cash acquired	(69,745		)	—
Change in restricted cash	(6,027		)	—
Other	82,141			(32,141		)
Net cash provided by (used in) investing activities	$	203,961		$	(195,554	)
Cash flows provided by (used in) financing activities:
Proceeds from issuance of ordinary shares and exercise of stock options	$	491		$	1,772
Buybacks of ordinary shares	(355,901		)	(1,966		)
Dividends paid on ordinary shares	(57,861		)	(40,922		)
Distributions to non-controlling interests	(27,857		)	(7,172		)
Contributions from non-controlling interests	883			2,569
Proceeds from the issuance of debt	—			980,600
Deposit liabilities	(8,546		)	(38,788		)
Net cash provided by (used in) financing activities	$	(448,791	)	$	896,093
Effects of exchange rate changes on foreign currency cash	(19,396		)	(47,397		)
Increase (decrease) in cash and cash equivalents	$	(435,339	)	$	688,120
Cash and cash equivalents - beginning of period	3,256,236			2,521,814
Cash and cash equivalents - end of period	$	2,820,897		$	3,209,934

See accompanying Notes to Unaudited Consolidated Financial Statements

5

XL GROUP PLC

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

1. Basis of Preparation and Consolidation

Unless the context otherwise indicates, references herein to the "Company" include XL Group plc, an Irish public limited company ("XL-Ireland"), and its consolidated subsidiaries.

These unaudited consolidated financial statements include the accounts of the Company and have been prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP") for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and disclosures required by GAAP for complete financial statements. In addition, the year-end balance sheet data was derived from audited financial statements but do not include all disclosures required by GAAP. In the opinion of management, these unaudited financial statements reflect all adjustments considered necessary for a fair statement of financial position and results of operations at the end of and for the periods presented. The results of operations for any interim period are not necessarily indicative of the results for a full year. All inter-company accounts and transactions have been eliminated. The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure about contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ materially from these estimates. For further information, see Item 8, Note 2(a), "Significant Accounting Policies - Basis of Preparation and Consolidation," to the Consolidated Financial Statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2015.

On February 29, 2016, the Company announced a proposal to change the parent holding company's place of incorporation to Bermuda from Ireland. To effect the redomestication, XL Group Ltd, a wholly-owned subsidiary of XL-Ireland and a Bermuda exempted company ("XL-Bermuda"), would replace XL-Ireland as the ultimate holding company of the XL group of companies, and XL-Ireland's ordinary shareholders would receive one common share of XL-Bermuda in exchange for each ordinary share of XL-Ireland held by them. The Company expects to submit the proposal for redomestication, along with related proposals, to its shareholders in the next several months and complete the transaction in the third quarter of 2016. The proposed redomestication will be subject to approval by the Company's ordinary shareholders and sanctioning by the High Court of Ireland. In addition, the proposed redomestication could be abandoned by the Company prior to its completion for any reason, including if any necessary regulatory approvals are not obtained. XL-Bermuda will continue to be registered with the U.S. Securities and Exchange Commission (the "SEC") and be subject to SEC reporting requirements applicable to domestic registrants. Further, if approved, XL-Bermuda will be subject to the applicable corporate governance rules of the New York Stock Exchange ("NYSE"), and will report its financial results in U.S. dollars and under U.S. generally accepted accounting principles, in addition to any reporting requirements under Bermuda law. XL-Bermuda's shares will continue to trade on the NYSE under the ticker symbol "XL". The Company does not expect the redomestication to have a material impact on the Company's financial condition, results of operations, including its global effective tax rate, or cash flows. If, and only if, the proposed redomestication is consummated, XL-Ireland will be liquidated and following the effectiveness of such liquidation, XL-Ireland's direct, wholly-owned subsidiary XLIT Ltd ("XL-Cayman"). will become a direct, wholly-owned subsidiary of XL-Bermuda. If the proposed redomestication is consummated the liquidation of XL-Ireland is expected to occur at the end of 2016 or beginning of 2017.

On May 1, 2015, the Company completed its acquisition of Catlin Group Limited and its consolidated subsidiaries ("Catlin"). Catlin, through its wholly-owned subsidiaries, provided property, casualty and specialty insurance and reinsurance coverage on a worldwide basis. The Company's consolidated results of operations include those of Catlin from May 1, 2015. For further information, see Item 8, Note 3(c), "Acquisitions and Disposals - Catlin Acquisition," to the Consolidated Financial Statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2015.

In May 2014, the Company ceded the majority of its life reinsurance business to GreyCastle Life Reinsurance ("GCLR") via 100% quota share reinsurance (the "GreyCastle Life Retro Arrangements"). Under the terms of the transaction, the Company continues to own, on a funds withheld basis, assets supporting the GreyCastle Life Retro Arrangements consisting of cash, fixed maturity securities and accrued interest (the "Life Funds Withheld Assets"). The Life Funds Withheld Assets are managed pursuant to agreed investment guidelines that meet the contractual commitments of the XL ceding companies and applicable laws and regulations. All of the investment results associated with the Life Funds Withheld Assets ultimately accrue to GCLR. Because the Company no longer shares in the risks and rewards of the underlying performance of the supporting invested assets, disclosures within the financial statement notes included herein separate the Life Funds Withheld Assets from the rest of the Company's investments. For further information, see Item 8, Note 3(e), "Acquisitions and Disposals - Sale of Life Reinsurance Subsidiary," to the Consolidated Financial Statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2015.

To facilitate period-to-period comparisons, certain reclassifications have been made to prior period consolidated financial statement amounts to conform to current period presentation.

6

XL GROUP PLC

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

2. Significant Accounting Policies

(a) Recent Accounting Pronouncements

In January 2016, the Financial Accounting Standards Board ("FASB") issued an accounting standards update concerning the accounting for financial instruments. The guidance retains the basic existing framework for accounting for financial instruments under GAAP, while achieving limited convergence with IFRS in this area. The guidance: (1) requires equity investments (except consolidated entities and those accounted for under the equity method of accounting) to be measured at fair value with changes in fair value recognized in net income, although equity instruments without a readily determinable fair value may be measured at cost less impairment with an adjustment for observable price changes; (2) simplifies the impairment assessment of equity investments without readily determinable fair values by requiring a qualitative assessment to identify impairment; (3) eliminates the requirement to disclose the fair value of financial instruments measured at amortized cost for non-public business entities; (4) eliminates the requirement to disclose the method(s) and significant assumptions used to estimate the fair value of financial instruments measured at amortized cost on the balance sheet; (5) requires public business entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes; (6) requires an entity to present separately in other comprehensive income the portion of the total change in the fair value of a liability resulting from a change in the instrument-specific credit risk when the entity has elected to measure the liability at fair value in accordance with the fair value option for financial statements; (7) requires separate presentation of financial assets and financial liabilities by measurement category and form of asset in the financial statements; and (8) clarifies that an entity should evaluate the need for a valuation allowance on a deferred tax asset related to available for sale securities in combination with the entity's other deferred tax assets. The guidance will be effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. Early adoption is permitted only for the amendment relating to presentation of the change in the fair value of a liability resulting from a change in instrument-specific credit risk and should be applied as of the beginning of the fiscal year of adoption. All of the amendments from this update should be applied by means of a cumulative effect adjustment to the balance sheet as of the beginning of the fiscal year of adoption, except the amendments related to impairment of equity securities without readily determinable fair values. The Company is currently evaluating the impact of this guidance, but expects that it will have an effect on results of operations as mark to market movements will prospectively impact net income. The Company does not expect this new guidance to have a material impact on the Company's financial condition or cash flows.

In February 2016, the FASB issued an accounting standards update concerning the accounting for leases. The most significant change to existing GAAP created by this standard will be the lessee recognition of lease assets and lease liabilities for those leases classified as operating. The core principle of this guidance stipulates that a lessee should recognize in the statement of financial position, initially measured at the present value of the lease payments, both a liability for contractual payments due under the lease, and an asset representing its right to use the underlying leased asset for the lease term ("right-of-use asset"). For financing leases, interest on the lease liability should be recognized separately from the amortization of the right-of-use asset in the statement of comprehensive income. Additionally, as regards the presentation of financing lease activities within the statement of cash flows, repayments of the principal portion of the lease liability should be classified within financing activities, while payments of interest on the lease liability should be classified within operating activities. For operating leases, a single net lease cost should be recognized over the lease term, generally on a straight-line basis, and all cash payments related to the lease should be classified within operating activities in the statement of cash flows. For leases with a term of 12 months or less, a lessee is permitted to make an accounting policy election by class of underlying asset not to recognize lease assets and lease liabilities, and therefore recognize lease expense for such leases on a straight-line basis over the lease term. The guidance will be effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early adoption is permitted. In transition, lessees and lessors are required to recognize and measure leases at the beginning of the earliest period presented using a modified retrospective approach, which includes a number of optional practical expedients that entities may elect to apply. An entity that elects to apply the practical expedients will substantively continue to account for leases that commence before the effective date in accordance with existing GAAP, except that a right-of-use asset and a lease liability must be recorded for all operating leases at each reporting date based on the present value of the remaining minimum rental payments that were previously tracked and disclosed. The Company is currently evaluating the impact of this guidance, but expects that it will have an effect on the Company's financial condition as new assets and liabilities related to operating leases are likely to be recorded as a result of adoption. The Company does not expect this new guidance to have a material impact on the Company's results of operations or cash flows.

In March 2016, the FASB issued an accounting standards update concerning the accounting for equity method investments. The amendments in this update require that when an investment qualifies for use of the equity method as a result of an increase in the level of ownership interest or degree of influence, the equity method investor add the cost of acquiring the additional interest in the investee to the current basis of the investor's previously held interest and adopt the equity method of accounting as of that date. Additionally, if the investment was previously accounted for as an available-for sale security, an entity also shall

7

XL GROUP PLC

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

immediately recognize through earnings the unrealized holding gain or loss in accumulated other comprehensive income (“AOCI”) as of that date. Thus, this new treatment is eliminating existing GAAP rules requiring retroactive adjustment of an entity’s investments, results of operations and retained earnings when an existing investment qualifies for the equity method of accounting. The guidance will be effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2016, and should be applied prospectively upon their effective date. Early adoption is permitted. The Company is currently evaluating the impact of this guidance, but does not expect this new guidance to have a material impact on the Company's financial condition, results of operations or cash flows.

In March 2016 as part of its simplification initiative, the FASB issued an accounting standards update concerning the accounting for several aspects of employee share-based payment awards including: income tax consequences, classification of awards as either equity or liabilities, classification of items in the statement of cash flows, and certain expedients that entities can now elect regarding estimates and assumptions in this area. Regarding the accounting for income taxes, all excess tax benefits and tax deficiencies, including tax benefits of dividends on share-based payment awards, should be recognized as income tax expense or benefit (regardless of whether the benefit reduces taxes payable in the current period) in the income statement, as opposed to additional paid-in capital as current GAAP prescribes. The tax effects of exercised or vested awards should be treated as discrete items in the reporting period in which they occur. Regarding the classification of awards, the update changes the threshold to qualify for equity classification from the employer's minimum statutory withholding requirements to the maximum statutory tax rates in the applicable jurisdictions. Regarding the classification of cash flows, excess tax benefits should be classified along with other income tax cash flows as an operating activity, while cash paid by an employer when directly withholding shares for tax-withholding purposes should be classified as a financing activity. As regards new expedients which can be elected related to estimates and assumptions in this area of accounting, the only one allowable for public business entities is that they may now make an entity-wide accounting policy election to either estimate the number of share-based payment awards that are expected to vest (which is current GAAP) or account for forfeitures as they occur. The guidance will be effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2016 with early adoption permitted so long as all the amendments in the update are adopted in the same period. The amendments within the guidance related to the recognition of excess tax benefits and tax deficiencies in the income statement as opposed to in paid-in capital should be applied prospectively. The amendments related to the statement of cash flows presentation of excess tax benefits may be adopted either prospectively or retrospectively, while the amendments related to the presentation of employee taxes paid must be applied retrospectively. The remaining amendments - relating to the timing of when excess tax benefits are recognized, the change in the threshold for equity versus liability classification of certain awards, and the allowable policy election regarding forfeitures - should be applied using a modified retrospective transition method by means of a cumulative-effect adjustment to equity as of the beginning of the period in which the guidance is adopted. The Company is currently evaluating the impact of this guidance, but expects it will have an impact on the Company's financial position, results of operations and cash flows upon adoption.

3. Acquisitions and Disposals

(a)    Allied Acquisition

Overview

On February 1, 2016, the Company announced that its indirect, wholly-owned subsidiary, XL Reinsurance America Inc. ("XLRA"), completed the acquisition ("Allied Acquisition") of Allied International Holdings, Inc. ("Allied"). Allied is the holding company of Allied Specialty Insurance, Inc. and T.H.E. Insurance Company, a leading insurer of the outdoor entertainment industry in the U.S.

Acquisition Consideration

The Company made an initial payment of $75.6 million to acquire Allied. Additional contingent consideration then will be paid based on production and underwriting profitability over a three year period subsequent to the acquisition date. The target payments of contingent consideration range from $7.5 million to $30.0 million. The Company currently believes the fair market value of these payments to be $15.0 million, resulting in total consideration of $90.6 million recorded for the acquisition.

Fair Value of Net Assets Acquired and Liabilities Assumed

The purchase price was allocated to the acquired assets and assumed liabilities of Allied based on estimated fair values on the acquisition date. The fair value of the net assets acquired and liabilities assumed was $76.7 million, which includes indefinite-lived intangible assets of $8.0 million and other intangible assets of $6.0 million, which will be amortized over their estimated useful lives. Other adjustments to the historical carrying value of acquired assets and liabilities included: estimating the fair value of net loss and loss expense reserves at the present value of expected net loss and loss adjustment expense

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XL GROUP PLC

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

payments plus a risk premium, estimating the value of the business acquired at the present value of expected underwriting profits with net unearned premiums plus a risk margin less policy servicing costs, and estimating the fair value of real estate assets at appraised market values. In conjunction with the transaction, the Company recognized goodwill of $13.9 million which is primarily attributable to the acquiree's underwriting expertise in a niche specialty risk business. The Company has allocated all of the $13.9 million of goodwill to its Insurance segment. See Note 8, "Goodwill and Other Intangible Assets," for further information.

The allocation of the purchase price is based on information that was available to management at the time the consolidated financial statements were prepared. The allocation may change as additional information becomes available within the measurement period, which cannot exceed 12 months from the Acquisition Date. The fair value recorded for these items may be subject to adjustments, which may impact the individual amounts recorded for assets acquired and liabilities assumed, as well as the residual goodwill.

(b)     New Energy Risk

On July 24, 2015, the Company purchased an additional 63.63% interest in New Energy Risk Inc. ("New Energy"), a provider of insurance risk management solutions within the alternative energy sector. A substantial portion of the additional shares were purchased directly from the family trusts of a Company employee who is responsible for managing the business generated by New Energy. Prior to the additional purchase, the Company held a 31.16% ownership interest in New Energy, which was accounted for as an equity method investment. The subsequent purchase raised the Company's ownership stake to 94.79%, which is deemed a controlling financial interest, and hence, the Company now consolidates New Energy. Subsequent to the additional purchase, the family trusts of the employee contributed their remaining 5.21% ownership interest in New Energy to XL Innovate Fund, LP ("XL Innovate Fund"), the entity that holds the Company's New Energy shares, in partial satisfaction of the employee's aggregate 5.21% investment commitment to the Fund. See Note 11, "Related Party Transactions," for further details of these transactions.

The Company paid approximately $8.8 million to acquire the additional interest in New Energy, and realized a gain of approximately $2.5 million, included within income from operating affiliates, in order to reflect the appropriate fair value adjustment to its existing investment previously accounted for under the equity method. The assets and liabilities of New Energy are now reflected in the consolidated financial statements of the Company based on their fair value as of the acquisition date, while Goodwill of approximately $13.4 million was recorded in conjunction with the transaction. See Note 8, "Goodwill and Other Intangible Assets," for a further discussion of the goodwill recorded in conjunction with the acquisition.

(c)    Catlin Acquisition

Overview

On May 1, 2015 (the "Acquisition Date"), the Company completed its acquisition (the "Catlin Acquisition") of the entire issued share capital of Catlin Group Limited ("Catlin") for approximately $4.1 billion. For further information, see Item 8, Note 3(c), "Acquisitions and Disposals - Catlin Acquisition," to the Consolidated Financial Statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2015.

Pursuant to the terms of the Implementation Agreement, XL-Ireland acquired each ordinary share of Catlin, par value $0.01 per share ("Catlin Shares"), for consideration per Catlin Share (the "Acquisition Consideration") equal to 388 pence in cash and 0.130 of an XL-Ireland ordinary share, par value $0.01 per share ("XL Shares"), subject to the mix and match facility set forth in the Implementation Agreement. The newly-issued XL Shares are listed on the New York Stock Exchange. The XL Shares issued in connection with the Catlin Acquisition were issued in reliance upon the exemption from registration under the U.S. Securities Act of 1933, as amended (the "Securities Act"), provided by Section 3(a)(10) of the Securities Act.

XL-Ireland issued approximately 49.9 million XL Shares and paid approximately £1.49 billion in cash to the holders of Catlin Shares as Acquisition Consideration pursuant to the terms of the Scheme.

Fair Value of Net Assets Acquired and Liabilities Assumed

The purchase price was allocated to the acquired assets and assumed liabilities of Catlin based on estimated fair values on the Acquisition Date. The Company recognized goodwill of $794.0 million which is primarily attributable to the synergies and economies of scale expected to result upon integration of Catlin into the Company's operations, including further diversification in geographic mix and product offerings and an increase in distribution strength. The Company has allocated $466.1 million of this goodwill to its Insurance segment and $327.9 million to its Reinsurance segment. The Company also recognized indefinite lived intangible assets of $673.0 million and other intangible assets of $315.0 million, which will be amortized over their estimated useful lives. See Note 8, "Goodwill and Other Intangible Assets," for further information.

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XL GROUP PLC

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

The allocation of the purchase price is based on information that was available to management at the time the consolidated financial statements were prepared. The allocation may change as additional information becomes available within the measurement period, which cannot exceed 12 months from the Acquisition Date. The fair value recorded for these items may be subject to adjustments, which may impact the individual amounts recorded for assets acquired and liabilities assumed, as well as the residual goodwill.

As part of the purchase price allocation, the Company adjusted the historical carrying value of the acquired assets and liabilities based on estimated fair values at the Acquisition Date. An explanation of the significant adjustments for fair value that are being amortized to net income is as follows:

• Deferred acquisition costs and value of business acquired - The adjustment consists of two components. The first adjustment is the elimination of Catlin's deferred acquisition costs asset. The second adjustment is the establishment of the value of business acquired asset, which represents the present value of the expected underwriting profit within the unearned premiums liability, net of reinsurance, less costs to service the related policies and a risk premium. This adjustment will be amortized to underwriting, acquisition and insurance expenses over approximately two years, as the contracts for business in-force as of the Acquisition Date expire. The Company has included $59.6 million in acquisition expenses related to the amortization of the value of business acquired during the three months ended March 31, 2016.

• Unpaid losses and loss adjustment expenses - Unpaid losses and loss adjustment expenses acquired include an increase to adjust the carrying value of Catlin's historical unpaid losses and loss adjustment expenses, net of related reinsurance recoverable, to fair value as of the Acquisition Date. The estimated fair value consists of the present value of the expected net loss and loss adjustment expense payments plus a risk premium. This adjustment, plus the unamortized fair value adjustment included in Catlin's historical unpaid losses and loss adjustment expenses, will be amortized to losses and loss adjustment expenses over a weighted average period of approximately 20 years, based on the estimated payout pattern of net reserves as of the Acquisition Date.

Transaction-related Costs

As a part of the ongoing integration of Catlin's operations, the Company incurs costs associated with restructuring the systems, processes and workforce. These costs include such items as severance, retention, facilities and consulting and other costs. The Company separately identifies such costs and includes these expenses within Corporate and Other:

(U.S. dollars in thousands)	Severance related costs		Retention and other compensation costs		Facilities-related costs		Consulting and other		Total
Liabilities at December 31, 2015	$	16,127	$	16,969	$	818	$	23,375	$	57,289
Costs incurred in 2016	16,758		8,006		6,103		24,120		54,987
2016 payments	16,535		17,466		1,040		16,303		51,344
Liabilities at March 31, 2016	$	16,350	$	7,509	$	5,881	$	31,192	$	60,932

(d)    Sale of Strategic Operating Affiliate

On April 1, 2015, XL Re Ltd ("XL Re"), an indirect wholly-owned subsidiary of the Company, completed the previously announced sale of all of its shares in ARX Holding Corp. ("ARX") to The Progressive Corporation ("Progressive") pursuant to the terms of the Stock Purchase Agreement with Progressive. XL Re's shares in ARX represented approximately 40.6% of ARX's outstanding capital stock on a fully diluted basis at the time of the announcement. The carrying value of XL Re's shares in ARX was $220.2 million at the time of the sale.

XL Re received $560.6 million in proceeds from the transaction, which was based upon the consolidated tangible net book value of ARX and its subsidiaries as of December 31, 2014, and certain other factors. Thus, the Company recorded a gain of $340.4 million as a result of this transaction.

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XL GROUP PLC

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

4. Fair Value Measurements

Fair value is defined as the amount that would be received for the sale of an asset or paid to transfer a liability (an exit price), in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants as of the measurement date. Applicable accounting guidance provides an established hierarchy for inputs used in measuring fair value that maximizes the use of observable inputs and minimizes the use of unobservable inputs by requiring that the most observable inputs be used when available. Observable inputs are inputs that market participants would use in valuing the asset or liability and are developed based on market data obtained from sources independent of the Company. Unobservable inputs are inputs that reflect the Company’s assumptions about the factors that market participants would use in valuing the asset or liability. Assets and liabilities are classified based on the lowest level of input that is significant to the fair value measurements. The Company reviews the fair value hierarchy classification on a quarterly basis. Changes in the observability of valuation inputs may result in a reclassification of levels for certain securities within the fair value hierarchy.

The fair values for available for sale investments are generally sourced from third parties. The fair value of fixed income securities is based upon quoted market values where available, "evaluated bid" prices provided by third party pricing services ("pricing services") where quoted market values are not available, or by reference to broker quotes where pricing services do not provide coverage for a particular security. While the Company receives values for the majority of the investment securities it holds from pricing services, it is ultimately management’s responsibility to determine whether the values received and recorded in the financial statements are representative of appropriate fair value measurements.

The Company performs regular reviews of the prices received from our third party valuation sources to assess whether the prices represent a reasonable estimate of the fair value. This process is completed by investment and accounting personnel who are independent of those responsible for obtaining the valuations. The approaches taken by the Company include, but are not limited to, annual reviews of the controls of the external parties responsible for sourcing valuations that are subjected to automated tolerance checks, quarterly reviews of the valuation sources and dates, comparisons of executed sales prices to prior valuations, regular deep dives on a sample of securities across our major asset classes and monthly reconciliations between the valuations provided by external parties and valuations provided by third party investment managers at a portfolio level.

In addition, the Company assesses the effectiveness of valuation controls performed by external parties responsible for sourcing appropriate valuations from third parties on our behalf. The approaches taken by these external parties to gain comfort include, but are not limited to, comparing valuations between external sources, completing recurring reviews of third party pricing services' methodologies and reviewing controls of the third party service providers to support the completeness and accuracy of the prices received. Where broker quotes are the primary source of the valuations, sufficient information regarding the specific inputs utilized by the brokers is generally not available to support a Level 2 classification. The Company obtains the majority of broker quoted values from third party investment managers who perform independent verifications of these valuations using pricing matrices based upon information gathered by market traders. In addition, for the majority of these securities, the Company compares the broker quotes to independent valuations obtained from third party pricing vendors, which may also consist of broker quotes, to assess if the prices received represent reasonable estimates of the fair value.

For further information about the Company's fair value measurements, see Item 8, Note 2(b), "Significant Accounting Policies - Fair Value Measurements," and Item 8, Note 4, "Fair Value Measurements," to the Consolidated Financial Statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2015.

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XL GROUP PLC

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

(a) Fair Value Summary

The following tables set forth the Company’s assets and liabilities that were accounted for at fair value as of March 31, 2016 and December 31, 2015 by level within the fair value hierarchy:

March 31, 2016 (U.S. dollars in thousands)	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Other Unobservable Inputs (Level 3)		Collateral and Counterparty Netting		Balance at March 31, 2016
Assets
Fixed maturities - Available for Sale ("AFS") - Excluding Life Funds Withheld Assets
U.S. Government and Government-Related/Supported ("U.S. Government")	$	—	$	4,532,047	$	44,940	$	—	$	4,576,987
Corporate - Financials	—		3,660,732		43,583		—		3,704,315
Corporate - Non Financials	—		7,091,329		181		—		7,091,510
Residential mortgage-backed securities – Agency ("RMBS - Agency")	—		4,364,154		2,853		—		4,367,007
Residential mortgage-backed securities – Non-Agency ("RMBS - Non-Agency")	—		302,843		—		—		302,843
Commercial mortgage-backed securities ("CMBS")	—		325,485		—		—		325,485
Collateralized debt obligations ("CDOs")	—		—		21,729		—		21,729
Other asset-backed securities (1)	—		1,158,698		4,200		—		1,162,898
U.S. States and political subdivisions of the States	—		2,584,747		—		—		2,584,747
Non-U.S. Sovereign Government, Provincial, Supranational and Government-Related/Supported ("Non-U.S. Governments")	—		5,546,695		—		—		5,546,695
Total fixed maturities - AFS - Excluding Funds Withheld Assets, at fair value	$	—	$	29,566,730	$	117,486	$	—	$	29,684,216
Equity securities, at fair value	532,672		345,735				—		878,407
Short-term investments, at fair value (1)	—		317,304		—		—		317,304
Total investments AFS - Excluding Funds Withheld Assets	$	532,672	$	30,229,769	$	117,486	$	—	$	30,879,927
Fixed maturities - Life Funds Withheld Assets
U.S. Government	$	—	$	12,692	$	—	$	—	$	12,692
Corporate - Financials	—		547,279		—		—		547,279
Corporate - Non Financials	—		1,269,262		—		—		1,269,262
RMBS – Agency	—		733		—		—		733
RMBS – Non-Agency	—		25,829		—		—		25,829
CMBS	—		108,914		—		—		108,914
Other asset-backed securities	—		121,721		—		—		121,721
Non-U.S. Governments	—		876,927		—		—		876,927
Total fixed maturities - AFS - Life Funds Withheld Assets, at fair value	$	—	$	2,963,357	$	—	$	—	$	2,963,357
Total investments - AFS, at fair value	$	532,672	$	33,193,126	$	117,486	$	—	$	33,843,284
Fixed maturities - Trading
U.S. Government	$	—	$	15,267	$	—	$	—	$	15,267
Corporate - Financials	—		382,755		—		—		382,755
Corporate - Non Financials	—		558,284		—		—		558,284
RMBS – Agency	—		1,869		—		—		1,869
CMBS	—		4,760		—		—		4,760
Other asset-backed securities	—		25,615		—		—		25,615
Non-U.S. Governments	—		421,033		—		—		421,033
Total fixed maturities - Trading, at fair value	$	—	$	1,409,583	$	—	$	—	$	1,409,583
Short-term investments, at fair value (1)	—		26,959		—		—		$	26,959
Total investments, Trading	$	—	$	1,436,542	$	—	$	—	$	1,436,542

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XL GROUP PLC

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

March 31, 2016 (U.S. dollars in thousands)	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Other Unobservable Inputs (Level 3)		Collateral and Counterparty Netting			Balance at March 31, 2016
Cash equivalents (2)	295,962		881,157		—		—			1,177,119
Cash equivalents - Life Funds Withheld Assets (2)	—		92,444		—		—			92,444
Other investments (3)	—		1,011,336		301,095		—			1,312,431
Other assets (4)	—		56,118		20,486		(37,870		)	38,734
Total assets accounted for at fair value	$	828,634	$	36,670,723	$	439,067	$	(37,870	)	$	37,900,554
Liabilities
Funds withheld on GreyCastle life retrocession arrangements (net of future policy benefit reserves recoverable) (5)	$	—	$	681,811	$	—	$	—		$	681,811
Financial instruments sold, but not yet purchased (6)	2,180		—		—		—			2,180
Other liabilities (4)	—		58,350		30,338		(37,870		)	50,818
Total liabilities accounted for at fair value	$	2,180	$	740,161	$	30,338	$	(37,870	)	$	734,809

December 31, 2015 (U.S. dollars in thousands)	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Other Unobservable Inputs (Level 3)		Collateral and Counterparty Netting		Balance at December 31, 2015
Assets
Fixed maturities - AFS - Excluding Life Funds Withheld Assets
U.S. Government	$	—	$	5,020,574	$	45,063	$	—	$	5,065,637
Corporate - Financials	—		3,508,224		53,685		—		$	3,561,909
Corporate - Non Financials	—		6,900,259		188		—		$	6,900,447
RMBS - Agency	—		3,754,894		3,077		—		$	3,757,971
RMBS - Non-Agency	—		328,540		—		—		$	328,540
CMBS	—		405,316		—		—		$	405,316
CDOs	—		2		32,408		—		$	32,410
Other asset-backed securities	—		1,150,715		17,857		—		$	1,168,572
U.S. States and political subdivisions of the States	—		2,632,070		—		—		$	2,632,070
Non-U.S. Government	—		5,251,614		—		—		$	5,251,614
Total fixed maturities - AFS - Excluding Funds Withheld Assets, at fair value	$	—	$	28,952,208	$	152,278	$	—	$	29,104,486
Equity securities, at fair value	528,581		350,338		—		—		878,919
Short-term investments, at fair value (1)	—		617,390		—		—		617,390
Total investments AFS - Excluding Funds Withheld Assets	$	528,581	$	29,919,936	$	152,278	$	—	$	30,600,795
Fixed maturities - Life Funds Withheld Assets
U.S. Government	$	—	$	12,742	$	—	$	—	$	12,742
Corporate - Financials	—		598,236		—		—		$	598,236
Corporate - Non Financials	—		1,308,628		—		—		$	1,308,628
RMBS – Agency	—		752		—		—		$	752
RMBS – Non-Agency	—		26,953		—		—		$	26,953
CMBS	—		122,481		—		—		$	122,481
Other asset-backed securities	—		149,795		—		—		$	149,795
Non-U.S. Government	—		933,516		—		—		$	933,516
Total fixed maturities - AFS - Life Funds Withheld Assets, at fair value	$	—	$	3,153,103	$	—	$	—	$	3,153,103
Total investments - AFS, at fair value	$	528,581	$	33,073,039	$	152,278	$	—	$	33,753,898

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XL GROUP PLC

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

December 31, 2015 (U.S. dollars in thousands)	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Other Unobservable Inputs (Level 3)		Collateral and Counterparty Netting			Balance at December 31, 2015
Fixed maturities - Trading
U.S. Government	$	—	$	4,990	$	—	$	—		$	4,990
Corporate - Financials	—		335,956		—		—			$	335,956
Corporate - Non Financials	—		493,621		—		—			$	493,621
RMBS – Agency	—		368		—		—			$	368
CMBS	—		4,803		—		—			$	4,803
Other asset-backed securities	—		25,700		—		—			$	25,700
Non-U.S. Government	—		370,261		—		—			$	370,261
Total fixed maturities - Trading, at fair value	$	—	$	1,235,699	$	—	$	—		$	1,235,699
Short-term investments, at fair value (1)	—		60,330		—		—			$	60,330
Total investments, Trading	$	—	$	1,296,029	$	—	$	—		$	1,296,029
Cash equivalents (2)	437,742		830,924		—		—			$	1,268,666
Cash equivalents - Life Funds Withheld Assets (2)	517		100,757		—		—			$	101,274
Other investments (3)	—		1,008,176		283,550		—			$	1,291,726
Other assets (4)	—		69,914		19,400		(3,087		)	$	86,227
Total assets accounted for at fair value	$	966,840	$	36,378,839	$	455,228	$	(3,087	)	$	37,797,820
Liabilities
Funds withheld on GreyCastle life retrocession arrangements (net of future policy benefit reserves recoverable) (5)	$	—	$	463,915	$	—	$	—		$	463,915
Financial instruments sold, but not yet purchased (6)	347		—		—		—			$	347
Other liabilities (4)	—		16,304		29,191		(3,087		)	$	42,408
Total liabilities accounted for at fair value	$	347	$	480,219	$	29,191	$	(3,087	)	$	506,670

____________

(1) Short-term investments consist primarily of Corporate securities and U.S. and Non-U.S. Government and Government-Related/Supported securities.

(2) Cash equivalents balances subject to fair value measurement include certificates of deposit and money market funds. Operating cash balances are not subject to recurring fair value measurement guidance.

(3) The Other investments balance excludes certain structured transactions including certain investments in project finance transactions, and a payment obligation and liquidity financing provided to a structured credit vehicle as a part of a third party medium term note facility. These investments, which totaled $141.5 million as of March 31, 2016 and $141.3 million as of December 31, 2015, are carried at amortized cost. For further information, see Item 8, Note 8, "Other Investments," to the Consolidated Financial Statements included in our Annual Report on Form 10-K for the year ended December 31, 2015.

(4) Other assets and other liabilities include derivative instruments. The derivative balances included in each category are reported on a gross basis by level with a netting adjustment presented separately in the Collateral and Counterparty Netting column. The fair values of the individual derivative contracts are reported gross in their respective levels based on the fair value hierarchy. For further details regarding derivative fair values and associated collateral received or paid, see Note 7, "Derivative Instruments."

(5) Funds withheld on GreyCastle life retrocession arrangements (net of future policy benefit reserves recoverable) include balances related to the life retrocession embedded derivative, under which all investment results associated with the Life Funds Withheld Assets related to the GreyCastle Life Retro Arrangements described in Note 1, "Basis of Preparation and Consolidation," accrue to the benefit of GCLR.

(6) Financial instruments sold, but not yet purchased, represent "short sales" and are included within "Payable for investments purchased" on the balance sheets.

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(b) Level 2 Asset Valuations

U.S. Government, Corporate - Financials, Corporate - Non Financials and Non-U.S. Government

Transaction activity inputs utilized in the valuation of fair value hierarchy Level 2 securities within these sub-categories include actual trades, dealer posts, results of bids-wanted, institutional secondary offerings, primary market offerings and Trade Reporting and Compliance Engine ("TRACE") trade feeds. As part of the evaluation process, transaction activity is compared to prior evaluations and necessary adjustments are made accordingly. Market-color inputs include actively quoted benchmark issues, buy-side/evaluator dialogue, sell-side/evaluator dialogue and credit derivative indices.

RMBS - Agency, RMBS - Non-Agency, CMBS, CDO and Other asset-backed securities

As part of the fair valuation process, Level 2 securities in these sub-categories are analyzed by collateral type, deal structure, deal performance and vintage. Market inputs into the valuation process for each sub-category include reported or observed trades, results of bids-wanted, buy-side/sell-side evaluator dialogue, dealer offering and market research reports. Cash flow inputs into the evaluation process include conditional prepayment rates, conditional decay rates, delinquency and loss severity rates. This assumptive data is reviewed and updated using third party reported information to reflect current market convention.

U.S. States and political subdivisions of the States

Transaction activity inputs utilized in the valuation of fair value hierarchy Level 2 securities within this sub-category include client and broker trades, dealer posts, results of bids-wanted, institutional secondary offerings, primary market offerings, and Municipal Securities Rulemaking trade feeds. As part of the evaluation process, transaction activity is compared to prior evaluations and necessary adjustments are made accordingly. Market-color inputs include bids, offerings, two-sided markets, buy-side/evaluator dialogue and sell-side/evaluator dialogue. Credit information inputs include issuer financial statements, default and material event notices, developer reports and liquidation and restructuring analysis.

Equity securities and other investments

Other investment securities generally include investments in thinly traded equity funds and hedge funds. Fair value is determined based upon the most recent net asset values (“NAV’) received from the fund administrators, the nature of the underlying investments in the funds and the frequency of subscriptions or redemptions as dictated by the fund’s governing documents.

Other assets and other liabilities

Other assets and other liabilities primarily include over-the-counter (“OTC”) derivatives, which are valued using market transactions and other market evidence whenever possible, including market-based inputs to models, model calibration to market clearing transactions, broker or dealer quotations or alternative independent pricing sources where an understanding of the inputs utilized in arriving at the valuations is obtained. Where models are used, the selection of a particular model to value an OTC derivative depends upon the contractual terms and specific risks inherent in the instrument as well as the availability of pricing information in the market. The Company generally uses similar models to value similar instruments. Valuation models require a variety of inputs, including contractual terms, market prices, yield curves, credit curves, measures of volatility, prepayment rates and correlations of such inputs. For OTC derivatives that trade in liquid markets, such as generic forwards, interest rate swaps and options, model inputs can generally be verified and model selection does not involve significant management judgment.

There were no significant transfers between Level 1 and Level 2 during each of the three months ended March 31, 2016 and 2015.

(c) Level 3 Assets and Liabilities

The tables below present additional information about assets and liabilities measured at fair value on a recurring basis and for which Level 3 inputs were utilized to determine fair value. The tables present a reconciliation of the beginning and ending balances for the three months ended March 31, 2016 and 2015 for all financial assets and liabilities measured at fair value using significant unobservable inputs (Level 3) at March 31, 2016 and 2015, respectively. The tables do not include gains or losses that were reported in Level 3 in prior periods for assets that were transferred out of Level 3 prior to March 31, 2016 and 2015, respectively. Gains and losses for assets and liabilities classified within Level 3 in the table below may include changes in fair value that are attributable to both observable inputs (Levels 1 and 2) and unobservable inputs (Level 3). Further, it should be noted that the following tables do not take into consideration the effect of offsetting Level 1 and 2 financial instruments entered into by the Company that are either economically hedged by certain exposures to the Level 3 positions or that hedge the exposures in Level 3 positions.

15

XL GROUP PLC

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

In general, Level 3 assets include securities for which values were obtained from brokers where either significant inputs were utilized in determining the values that were difficult to corroborate with observable market data, or sufficient information regarding the specific inputs utilized by the broker was not available to support a Level 2 classification. Transfers into or out of Level 3 primarily arise as a result of the valuations utilized by the Company changing between either those provided by independent pricing services that do not contain significant unobservable inputs and other valuations sourced from brokers that are considered Level 3.

Fixed maturities and short-term investments

The Company’s Level 3 assets consist primarily of U.S. Government and Government-Related/Supported, Corporates and CDOs, for which non-binding broker quotes are the primary source of the valuations. Sufficient information regarding the specific inputs utilized by the brokers was not available to support a Level 2 classification. The Company obtains the majority of broker quotes for these securities from third party investment managers who perform independent verifications of these valuations using pricing matrices based upon information gathered by market traders. In addition, for the majority of these securities, the Company compares the broker quotes to independent valuations obtained from third party pricing vendors, which may also consist of broker quotes, to assess if the prices received represent a reasonable estimate of the fair value. Although the Company does not have access to the specific unobservable inputs that may have been used in the fair value measurements of these securities provided by brokers, we would expect that the significant inputs considered are prepayment rates, probability of default, loss severity in the event of default, recovery rates, liquidity premium and reinvestment rates. Significant increases (decreases) in any of those inputs in isolation could result in a significantly different fair value measurement. Generally, a change in the assumption used for the probability of default is accompanied by a directionally similar change in the assumption used for the loss severity and a directionally opposite change in the assumption used for prepayment rates.

The remainder of the Level 3 assets relate primarily to private investments (including funds) and certain derivative positions as described below.

Other investments

Included within the other investments component of the Company’s Level 3 valuations are private investments (including funds) and hedge funds where the Company is not deemed to have significant influence over the investee. The fair value of these investments is based upon net asset values received from the investment manager or general partner of the respective entity. The nature of the underlying investments held by the investee that form the basis of the net asset value include assets such as private business ventures and are such that significant Level 3 inputs are utilized in the determination of the individual underlying holding values and, accordingly, the fair value of the Company’s investment in each entity is classified within Level 3. The Company has not adjusted the net asset values received; however, management incorporates factors such as the most recent financial information received, annual audited financial statements and the values at which capital transactions with the investee take place when applying judgment regarding whether any adjustments should be made to the net asset value in recording the fair value of each position. Investments in hedge funds included in other investments utilize strategies including arbitrage, directional, event driven and multi-style. The funds potentially have lockup and gate provisions that may limit redemption liquidity. For further details regarding the nature of other investments and related features, see Item 8, Note 8, "Other Investments," to the Consolidated Financial Statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2015.

Derivative instruments

Derivative instruments recorded within other liabilities and classified within Level 3 include credit derivatives sold that provide protection on senior tranches of structured finance transactions where the value is obtained directly from the investment bank counterparty and sufficient information regarding the inputs utilized in such valuation was not obtained to support a Level 2 classification and guaranteed minimum income benefits embedded within one reinsurance contract. The majority of inputs utilized in the valuations of these types of derivative contracts are considered Level 1 or Level 2; however, each valuation includes at least one Level 3 input that was significant to the valuation and, accordingly, the values are disclosed within Level 3.

The calculation of the change in fair value of the embedded derivative associated with the GreyCastle Life Retro Arrangements includes the interest income, realized and unrealized gains and losses on Life Funds Withheld Assets and certain related expenses related to the Life Funds Withheld Assets. The fair value of the embedded derivative is included in “Funds withheld on GreyCastle life retrocession arrangements, net of future policy benefit reserves recoverable” on the consolidated balance sheets. The fair value of the embedded derivative is considered a Level 2 valuation.

16

XL GROUP PLC

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

	Level 3 Assets and Liabilities - Three Months Ended March 31, 2016
(U.S. dollars in thousands)	U.S. Government			Corporate - Financials			Corporate - Non-Financials			RMBS - Agency
Balance, beginning of period	$	45,063		$	53,685		$	188		$	3,077
Realized gains (losses)	(37		)	53			—			(3		)
Movement in unrealized gains (losses)	593			(39		)	(1		)	7
Purchases and issuances	—			169			—			—
Sales	—			—			—			—
Settlements	(679		)	—			(6		)	(228		)
Transfers into Level 3	—			—			—			—
Transfers out of Level 3	—			(10,285		)	—			—
Fixed maturities to short-term investments classification change				—			—			—
Balance, end of period	$	44,940		$	43,583		$	181		$	2,853
Movement in total gains (losses) above relating to instruments still held at the reporting date	$	554		$	15		$	(1	)	$	4
(U.S. dollars in thousands)	RMBS - Non Agency			CMBS			CDO			Other asset- backed securities
Balance, beginning of period	$	—		$	—		$	32,408		$	17,857
Realized gains (losses)	—			—			41			1,049
Movement in unrealized gains (losses)	—			—			5,257			(2,758		)
Purchases and issuances	—			—			—			—
Sales	—			—			—			—
Settlements	—			—			(15,977		)	(11,948		)
Transfers into Level 3	—			—			—			—
Transfers out of Level 3	—			—			—			—
Fixed maturities to short-term investments classification change	—			—			—			—
Balance, end of period	$	—		$	—		$	21,729		$	4,200
Movement in total gains (losses) above relating to instruments still held at the reporting date	$	—		$	—		$	5,297		$	(1,708	)
(U.S. dollars in thousands)	Non-US Government			Short-term investments			Other investments			Derivative Contracts - Net
Balance, beginning of period	$	—		$	—		$	283,550		$	(9,791	)
Realized gains (losses)	—			—			5,807			—
Movement in unrealized gains (losses)	—			—			(2,717		)	(61		)
Purchases and issuances	—			—			13,779			—
Sales	—			—			—			—
Settlements	—			—			(14,818		)	—
Transfers into Level 3	—			—			15,494			—
Transfers out of Level 3	—			—			—			—
Fixed maturities to short-term investments classification change	—			—			—			—
Balance, end of period	$	—		$	—		$	301,095		$	(9,852	)
Movement in total gains (losses) above relating to instruments still held at the reporting date	$	—		$	—		$	3,090		$	(61	)

17

XL GROUP PLC

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

	Level 3 Assets and Liabilities - Three Months Ended March 31, 2015
(U.S. dollars in thousands)	U.S. Government		Corporate - Financials		Corporate - Non-Financials			RMBS - Agency
Balance, beginning of period	$	—	$	—	$	5,894		$	1,910
Realized gains (losses)	—		—		(1		)	—
Movement in unrealized gains (losses)	—		—		48			(1		)
Purchases and issuances (1)	—		—		—			—
Sales	—		—		—			—
Settlements	—		—		(80		)	(89		)
Transfers into Level 3	—		—		—			—
Transfers out of Level 3	—		—		—			—
Fixed maturities to short-term investments classification change	—		—		—			—
Balance, end of period	$	—	$	—	$	5,861		$	1,820
Movement in total gains (losses) above relating to instruments still held at the reporting date	$	—	$	—	$	48		$	(1	)
(U.S. dollars in thousands)	RMBS - Non Agency		CMBS		CDO			Other asset- backed securities
Balance, beginning of period	$	—	$	—	$	687,958		$	5,288
Realized gains (losses)	—		—		36			(1		)
Movement in unrealized gains (losses)	—		—		5,555			2
Purchases and issuances (1)	—		—		—			—
Sales	—		—		(155,085		)	—
Settlements	—		—		(41,541		)	(3,045		)
Transfers into Level 3	—		—		—			—
Transfers out of Level 3	—		—		—			—
Fixed maturities to short-term investments classification change	—		—		—			—
Balance, end of period	$	—	$	—	$	496,923		$	2,244
Movement in total gains (losses) above relating to instruments still held at the reporting date	$	—	$	—	$	2,668		$	—
(U.S. dollars in thousands)	Non-US Government		Short-term investments		Other investments			Derivative Contracts - Net
Balance, beginning of period	$	—	$	—	$	185,083		$	(9,764	)
Realized gains (losses)	—		—		1,302			—
Movement in unrealized gains (losses)	—		—		(1,827		)	158
Purchases and issuances (1)	—		—		6,793			—
Sales	—		—		—			—
Settlements	—		—		(1,254		)	—
Transfers into Level 3	—		—		—			—
Transfers out of Level 3	—		—		—			—
Fixed maturities to short-term investments classification change	—		—		—			—
Balance, end of period	$	—	$	—	$	190,097		$	(9,606	)
Movement in total gains (losses) above relating to instruments still held at the reporting date	$	—	$	—	$	(524	)	$	158

18

XL GROUP PLC

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

(d) Financial Instruments Not Carried at Fair Value

Authoritative guidance over disclosures about the fair value of financial instruments requires additional disclosure of fair value information for financial instruments not carried at fair value in both interim and annual reporting periods. Certain financial instruments, particularly insurance contracts, are excluded from these fair value disclosure requirements. The carrying values of cash and cash equivalents, accrued investment income, net receivable from investments sold, other assets, net payable for investments purchased, other liabilities and other financial instruments not included below approximated their fair values. The following table includes financial instruments for which the carrying value differs from the estimated fair values as of March 31, 2016 and December 31, 2015. All of these fair value estimates are considered Level 2 fair value measurements.

	March 31, 2016				December 31, 2015
(U.S. dollars in thousands)	Carrying Value		Fair Value		Carrying Value		Fair Value
Financial Assets - Other investments	$	141,459	$	153,844	$	141,329	$	154,065
Deposit liabilities	$	1,171,655	$	1,478,856	$	1,168,376	$	1,436,210
Notes payable and debt	2,645,647		2,815,562		2,644,970		2,805,152
Financial Liabilities	$	3,817,302	$	4,294,418	$	3,813,346	$	4,241,362

The Company historically participated in structured transactions. Remaining structured transactions include cash loans supporting project finance transactions, a liquidity facility financing provided to structured project deals and an investment in a payment obligation with an insurance company. These transactions are carried at amortized cost. The fair value of these investments held by the Company is determined through use of internal models utilizing reported trades, benchmark yields, broker/dealer quotes, issuer spreads, two-sided markets, benchmark securities, bids, offers and reference data.

Deposit liabilities include obligations under structured insurance and reinsurance transactions. For purposes of fair value disclosures, the Company determined the estimated fair value of the deposit liabilities by assuming a discount rate equal to the appropriate U.S. Treasury rate plus 38.0 basis points and 26.5 basis points as of March 31, 2016 and December 31, 2015, respectively. The discount rate incorporates the Company’s own credit risk into the determination of estimated fair value.

The fair values of the Company’s notes payable and debt outstanding were determined based on quoted market prices.

There are no significant concentrations of credit risk within the Company’s financial instruments as defined in the authoritative guidance over disclosures of fair value of financial instruments not carried at fair value, which excludes certain financial instruments, particularly insurance contracts.

5. Segment Information

The Company is organized into two operating segments: Insurance and Reinsurance. Subsequent to the transaction described in Note 3(c), "Acquisitions and Disposals - Catlin Acquisition," the underwriting results of the acquired businesses from the Acquisition Date through March 31, 2016 are included in the Company's Insurance or Reinsurance segment, as appropriate.

The Company’s general investment and financing operations are reflected in "Corporate and Other." Subsequent to the transaction described in Note 1, "Basis of Preparation and Consolidation," GCLR reinsures the majority of the Company's life reinsurance business through the GreyCastle Life Retro Arrangements. The results of the Run-Off Life Operations not subject to the GreyCastle Life Retro Arrangements are also reported within Corporate and Other.

19

XL GROUP PLC

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

The Company evaluates the performance of both the Insurance and Reinsurance segments based on underwriting profit. Other items of revenues and expenditures of the Company are not evaluated at the segment level. In addition, the Company does not allocate investment assets used to support its Property and Casualty ("P&C") operations to the individual segments, except as noted below. Investment assets related to the Company’s Run-Off Life Operations and certain structured products included in the Insurance and Reinsurance segments are held in separately identified portfolios. As such, net investment income from these assets is included in the contribution from the applicable segment or in Corporate and Other. The following tables summarize the segment results for the three months ended March 31, 2016 and 2015:

Three Months Ended March 31, 2016 (U.S. dollars in thousands, except ratios)	Insurance			Reinsurance			Total P&C			Corporate and Other (1)			Total
Gross premiums written	$	2,503,972		$	1,855,343		$	4,359,315		$	68,911		$	4,428,226
Net premiums written	1,503,934			1,557,661			3,061,595			3,164			3,064,759
Net premiums earned	1,593,874			757,572			2,351,446			3,164			2,354,610
Less: Net losses and loss expenses (2)	999,592			382,893			1,382,485			4,937			1,387,422
Less: Acquisition costs (2)	225,458			176,348			401,806			1,461			403,267
Less: Operating expenses (3)	312,432			79,234			391,666			218			391,884
Underwriting profit (loss)	$	56,392		$	119,097		$	175,489		$	(3,452	)	$	172,037
Net investment income - excluding Life Funds Withheld Assets (4)							143,131			8,533			151,664
Net investment income - Life Funds Withheld Assets										41,560			41,560
Net results from structured products (5)	1,222			748			1,970			—			1,970
Net fee income and other (6)	(3,862		)	837			(3,025		)	302			(2,723		)
Net realized gains (losses) on investments - excluding Life Funds Withheld Assets							(11,160		)	2,744			(8,416		)
Net realized gains (losses) on investments and net unrealized gains (losses) on investments, Trading - Life Funds Withheld Assets							—			101,166			101,166
Net realized and unrealized gains (losses) on derivative instruments							—			(3,622		)	(3,622		)
Net realized and unrealized gains (losses) on life retrocession embedded derivative and derivative instruments - Life Funds Withheld Assets							—			(236,080		)	(236,080		)
Net income (loss) from investment fund affiliates and operating affiliates							—			8,071			8,071
Gain on sale of operating affiliate										—			—
Less: Exchange (gains) losses							—			(33,819		)	(33,819		)
Less: Corporate operating expenses							—			112,510			112,510
Contribution from P&C and Corporate and Other							306,405			(159,469		)	146,936
Less: Interest expense (7)										41,613			41,613
Less: Non-controlling interests										61,143			61,143
Less: Income tax expense										22,295			22,295
Net income (loss) attributable to ordinary shareholders													$	21,885
Ratios – P&C operations: (8)
Loss and loss expense ratio	62.7		%	50.5		%	58.8		%
Underwriting expense ratio	33.8		%	33.8		%	33.7		%
Combined ratio	96.5		%	84.3		%	92.5		%

____________

(1) Corporate and Other includes other items of our revenue and expenditures that are not evaluated at the segment level for reporting purposes, as well as the Company's Run-Off Life Operations.

(2) The Company has reflected the amortization of certain fair value adjustments recorded in conjunction with the Catlin Acquisition within the respective segments.

(3) Operating expenses of the segments exclude Corporate operating expenses, shown separately.

(4) Net investment income - excluding Life Funds Withheld Assets does not include net investment income related to the net results from structured products.

(5) The net results from P&C structured products include net investment income and interest expense of $12.7 million and $10.7 million, respectively.

(6) Net fee income and other includes operating expenses from the Company's loss prevention consulting services business.

(7) Interest expense excludes interest expense related to structured products recorded in the Insurance and Reinsurance segments.

(8) Ratios are based on net premiums earned from P&C operations.

20

XL GROUP PLC

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

Three Months Ended March 31, 2015 (U.S. dollars in thousands, except ratios)	Insurance			Reinsurance			Total P&C			Corporate and Other (1)			Total
Gross premiums written	$	1,654,747		$	825,662		$	2,480,409		$	74,951		$	2,555,360
Net premiums written	1,089,108			747,635			1,836,743			14,506			1,851,249
Net premiums earned	962,306			357,188			1,319,494			14,506			1,334,000
Less: Net losses and loss expenses	616,947			152,880			769,827			19,387			789,214
Less: Acquisition costs	80,387			71,492			151,879			1,817			153,696
Less: Operating expenses (2)	208,457			42,495			250,952			931			251,883
Underwriting profit (loss)	$	56,515		$	90,321		$	146,836		$	(7,629	)	$	139,207
Net investment income - excluding Life Funds Withheld Assets (3)							132,808			10,210			143,018
Net investment income - Life Funds Withheld Assets										50,419			50,419
Net results from structured products (4)	2,905			2,120			5,025			—			5,025
Net fee income and other (5)	(7,465		)	825			(6,640		)	132			(6,508		)
Loss on sale of life reinsurance subsidiary							—			—			—
Net realized gains (losses) on investments - excluding Life Funds Withheld Assets							5,807			(1,205		)	4,602
Net realized gains (losses) on investments and net unrealized gains (losses) on investments, Trading - Life Funds Withheld Assets							—			48,289			48,289
Net realized and unrealized gains (losses) on derivative instruments							—			16,521			16,521
Net realized and unrealized gains (losses) on life retrocession embedded derivative and derivative instruments - Life Funds Withheld Assets							—			(229,367		)	(229,367		)
Net income (loss) from investment fund affiliates and operating affiliates							—			57,997			57,997
Less: Exchange (gains) losses							—			27,390			27,390
Less: Corporate operating expenses							—			62,443			62,443
Contribution from P&C and Corporate and Other							283,836			(144,466		)	139,370
Less: Interest expense (6)										41,481			41,481
Less: Non-controlling interests										37,390			37,390
Less: Income tax expense										24,218			24,218
Net income (loss) attributable to ordinary shareholders													$	36,281
Ratios – P&C operations: (7)
Loss and loss expense ratio	64.1		%	42.8		%	58.3		%
Underwriting expense ratio	30.0		%	31.9		%	30.6		%
Combined ratio	94.1		%	74.7		%	88.9		%

____________

(1) Corporate and Other includes other items of our revenue and expenditures that are not evaluated at the segment level for reporting purposes, as well as the Company's Run-Off Life Operations.

(2) Operating expenses of the segments exclude Corporate operating expenses, shown separately.

(3) Net investment income - excluding Life Funds Withheld Assets does not include net investment income related to the net results from structured products.

(4) The net results from P&C structured products include net investment income and interest expense of $15.1 million and $10.0 million, respectively.

(5) Net fee income and other includes operating expenses from the Company's loss prevention consulting services business.

(6) Interest expense excludes interest expense related to structured products recorded in the Insurance and Reinsurance segments.

(7) Ratios are based on net premiums earned from P&C operations.

21

XL GROUP PLC

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

The following tables summarize the Company’s net premiums earned by line of business for the three months ended March 31, 2016 and 2015:

Three Months Ended March 31, 2016 (U.S. dollars in thousands)	Insurance		Reinsurance		Corporate and Other			Total
P&C Operations:
Professional	$	332,954	$	43,155	$	—		$	376,109
Casualty	420,212		154,739		—			574,951
Property catastrophe	—		205,301		—			205,301
Property	359,633		254,399		—			614,032
Specialty	367,352		36,193		—			403,545
Other (1)	113,723		63,785		—			177,508
Total P&C Operations	$	1,593,874	$	757,572	$	—		$	2,351,446
Corporate and Other:
Run-off Life operations - Annuity	$	—	$	—	$	—		$	—
Run-off Life operations - Other Life	—		—		3,164			3,164
Total Corporate and Other	$	—	$	—	$	3,164		$	3,164
Total	$	1,593,874	$	757,572	$	3,164		$	2,354,610
Three Months Ended March 31, 2015 (U.S. dollars in thousands)	Insurance		Reinsurance		Corporate and Other			Total
P&C Operations:
Professional	$	266,410	$	35,008	$	—		$	301,418
Casualty	341,317		58,208		—			399,525
Property catastrophe	—		94,073		—			94,073
Property	172,539		131,224		—			303,763
Specialty	171,878		18,075		—			189,953
Other (1)	10,162		20,600		—			30,762
Total P&C Operations	$	962,306	$	357,188	$	—		$	1,319,494
Corporate and Other:
Run-off Life operations - Annuity	$	—	$	—	$	(1	)	$	(1	)
Run-off Life operations - Other Life	—		—		14,507			14,507
Total Corporate and Other	$	—	$	—	$	14,506		$	14,506
Total	$	962,306	$	357,188	$	14,506		$	1,334,000

____________

(1) Other within the Insurance segment includes: excess and surplus, programs, surety, structured indemnity and certain discontinued lines. Other within the Reinsurance segment includes: whole account contracts, structured indemnity and other lines.

22

XL GROUP PLC

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

6. Investments

(a) Fixed Maturities, Short-Term Investments and Equity Securities

Amortized Cost and Fair Value Summary

The cost (amortized cost for fixed maturities and short-term investments), fair value, gross unrealized gains and gross unrealized (losses), including non-credit related OTTI recorded in AOCI, of the Company’s AFS investments as of March 31, 2016 and December 31, 2015, were as follows:

			Included in AOCI
March 31, 2016 (U.S. dollars in thousands)	Cost or Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value		Non-credit Related OTTI (1)
Fixed maturities - AFS
U.S. Government	$	4,483,796	$	101,066	$	(7,875	)	$	4,576,987	$	—
Corporate - Financials	3,656,521		75,341		(27,547		)	3,704,315		—
Corporate - Non Financials	6,935,636		210,829		(54,955		)	7,091,510		—
RMBS – Agency	4,259,838		112,260		(5,091		)	4,367,007		—
RMBS – Non-Agency	303,377		20,313		(20,847		)	302,843		(52,025		)
CMBS	317,886		10,324		(2,725		)	325,485		(1,163		)
CDO	25,845		2		(4,118		)	21,729		(1,208		)
Other asset-backed securities	1,154,679		19,123		(10,904		)	1,162,898		(1,027		)
U.S. States and political subdivisions of the States	2,436,400		149,140		(793		)	2,584,747		—
Non-U.S. Governments	5,442,418		161,392		(57,115		)	5,546,695		—
Total fixed maturities - AFS - Excluding Life Funds Withheld Assets	$	29,016,396	$	859,790	$	(191,970	)	$	29,684,216	$	(55,423	)
Total short-term investments - Excluding Life Funds Withheld Assets	317,939		433		(1,068		)	317,304		—
Total equity securities	831,543		93,517		(46,653		)	878,407		—
Total investments - AFS - Excluding Life Funds Withheld Assets	$	30,165,878	$	953,740	$	(239,691	)	$	30,879,927	$	(55,423	)
Fixed maturities - AFS - Life Funds Withheld Assets
U.S. Government	$	10,315	$	2,377	$	—		$	12,692	$	—
Corporate - Financials	486,901		60,378		—			547,279		—
Corporate - Non Financials	1,058,886		210,376		—			1,269,262		—
RMBS – Agency	597		136		—			733		—
RMBS – Non-Agency	23,172		2,657		—			25,829		—
CMBS	92,586		16,328		—			108,914		—
Other asset-backed securities	105,635		16,086		—			121,721		—
Non-U.S. Governments	650,259		226,668		—			876,927		—
Total fixed maturities - AFS - Life Funds Withheld Assets	$	2,428,351	$	535,006	$	—		$	2,963,357	$	—
Total investments - AFS	$	32,594,229	$	1,488,746	$	(239,691	)	$	33,843,284	$	(55,423	)

____________

(1) Represents the non-credit component of OTTI losses, adjusted for subsequent sales of securities. It does not include the change in fair value subsequent to the impairment measurement date.

23

XL GROUP PLC

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

December 31, 2015 (U.S. dollars in thousands)	Cost or Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value		Non-credit Related OTTI (1)
Fixed maturities - AFS - Excluding Life Funds Withheld Assets
U.S. Government	$	5,047,621	$	52,355	$	(34,339	)	$	5,065,637	$	—
Corporate - Financials	3,535,830		49,535		(23,456		)	3,561,909		—
Corporate - Non Financials	6,867,525		130,568		(97,646		)	6,900,447		—
RMBS – Agency	3,697,756		77,776		(17,561		)	3,757,971		—
RMBS – Non-Agency	319,876		25,644		(16,980		)	328,540		(54,200		)
CMBS	401,713		7,933		(4,330		)	405,316		(1,182		)
CDOs	41,679		4		(9,273		)	32,410		(1,208		)
Other asset-backed securities	1,164,426		17,665		(13,519		)	1,168,572		(1,144		)
U.S. States and political subdivisions of the States	2,514,048		125,395		(7,373		)	2,632,070		—
Non-U.S. Government	5,249,148		100,383		(97,917		)	5,251,614		—
Total fixed maturities - AFS - Excluding Life Funds Withheld Assets	$	28,839,622	$	587,258	$	(322,394	)	$	29,104,486	$	(57,734	)
Total short-term investments - Excluding Life Funds Withheld Assets	$	618,851	$	967	$	(2,428	)	$	617,390	$	—
Total equity securities - Excluding Life Funds Withheld Assets	$	834,079	$	89,993	$	(45,153	)	$	878,919	$	—
Total investments - AFS - Excluding Life Funds Withheld Assets	$	30,292,552	$	678,218	$	(369,975	)	$	30,600,795	$	(57,734	)
Fixed maturities - AFS - Life Funds Withheld Assets
U.S. Government	$	10,721	$	2,021	$	—		$	12,742	$	—
Corporate - Financials	531,016		67,220		—			598,236		—
Corporate - Non Financials	1,132,926		175,702		—			1,308,628		—
RMBS – Agency	591		161		—			752		—
RMBS – Non-Agency	24,401		2,552		—			26,953		—
CMBS	107,968		14,513		—			122,481		—
Other asset-backed securities	132,674		17,121		—			149,795		—
Non-U.S. Governments	737,735		195,781		—			933,516		—
Total fixed maturities - AFS - Life Funds Withheld Assets	$	2,678,032	$	475,071	$	—		$	3,153,103	$	—
Total investments - AFS	$	32,970,584	$	1,153,289	$	(369,975	)	$	33,753,898	$	(57,734	)

____________

(1) Represents the non-credit component of OTTI losses, adjusted for subsequent sales of securities. It does not include the change in fair value subsequent to the impairment measurement date.

The cost (amortized cost for fixed maturities and short-term investments) and fair value of the Company’s Trading investments at December 31, 2016 and 2015, were as follows:

March 31, 2016 (U.S. dollars in thousands)	Amortized Cost		Fair Value
Fixed maturities - Trading - Life Funds Withheld Assets
U.S. Government	$	15,567	$	15,267
Corporate - Financials	379,848		382,755
Corporate - Non Financials	549,458		558,284
RMBS – Agency	1,917		1,869
CMBS	4,675		4,760
Other asset-backed securities	25,457		25,615
Non-U.S. Governments	390,986		421,033
Total fixed maturities - Trading - Life Funds Withheld Assets	$	1,367,908	$	1,409,583
Total short-term investments - Trading - Life Funds Withheld Assets	$	26,949	$	26,959
Total investments - Trading - Life Funds Withheld Assets	$	1,394,857	$	1,436,542

24

XL GROUP PLC

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

December 31, 2015 (U.S. dollars in thousands)	Amortized Cost		Fair Value
Fixed maturities - Trading - Life Funds Withheld Assets
U.S. Government	$	4,957	$	4,990
Corporate - Financials	344,070		335,956
Corporate - Non Financials	509,441		493,621
RMBS – Agency	370		368
CMBS	4,874		4,803
Other asset-backed securities	26,405		25,700
Non-U.S. Governments	373,492		370,261
Total fixed maturities - Trading - Life Funds Withheld Assets	$	1,263,609	$	1,235,699
Total short-term investments - Trading - Life Funds Withheld Assets	$	60,176	$	60,330
Total investments - Trading - Life Funds Withheld Assets	$	1,323,785	$	1,296,029

As of March 31, 2016 and December 31, 2015, approximately 2.1% and 2.0%, respectively, of the Company's fixed income investment portfolio at fair value, excluding Life Funds Withheld Assets, was invested in securities that were below investment grade or not rated. Approximately 18.3% and 14.7% of the gross unrealized losses in the Company's fixed income investment portfolio, excluding Life Funds Withheld Assets, as of March 31, 2016 and December 31, 2015, respectively, related to securities that were below investment grade or not rated.

Contractual Maturities Summary

The contractual maturities of AFS fixed income securities at March 31, 2016 and December 31, 2015 are shown below. Actual maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties.

	March 31, 2016				December 31, 2015
(U.S. dollars in thousands)	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Fixed maturities - AFS - Excluding Life Funds Withheld Assets
Due less than one year	$	2,156,182	$	2,151,862	$	2,106,851	$	2,104,106
Due after 1 through 5 years	13,787,996		14,020,514		14,051,494		14,143,461
Due after 5 through 10 years	5,622,857		5,828,464		5,680,830		5,740,954
Due after 10 years	1,387,736		1,503,414		1,374,997		1,423,156
	$	22,954,771	$	23,504,254	$	23,214,172	$	23,411,677
RMBS – Agency	4,259,838		4,367,007		3,697,756		3,757,971
RMBS – Non-Agency	303,377		302,843		319,876		328,540
CMBS	317,886		325,485		401,713		405,316
CDOs	25,845		21,729		41,679		32,410
Other asset-backed securities	1,154,679		1,162,898		1,164,426		1,168,572
Total mortgage and asset-backed securities	$	6,061,625	$	6,179,962	$	5,625,450	$	5,692,809
Total fixed maturities - AFS - Excluding Life Funds Withheld Assets	$	29,016,396	$	29,684,216	$	28,839,622	$	29,104,486
Fixed maturities - AFS - Life Funds Withheld Assets
Due less than one year	$	78,629	$	88,560	$	81,700	$	92,921
Due after 1 through 5 years	361,106		391,528		386,810		416,743
Due after 5 through 10 years	470,386		547,171		491,621		558,805
Due after 10 years	1,296,240		1,678,901		1,452,267		1,784,653
	$	2,206,361	$	2,706,160	$	2,412,398	$	2,853,122
RMBS – Agency	597		733		591		752
RMBS – Non-Agency	23,172		25,829		24,401		26,953
CMBS	92,586		108,914		107,968		122,481
Other asset-backed securities	105,635		121,721		132,674		149,795
Total mortgage and asset-backed securities	$	221,990	$	257,197	$	265,634	$	299,981
Total fixed maturities - AFS - Life Funds Withheld Assets	$	2,428,351	$	2,963,357	$	2,678,032	$	3,153,103
Total fixed maturities - AFS	$	31,444,747	$	32,647,573	$	31,517,654	$	32,257,589

25

XL GROUP PLC

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

	March 31, 2016				December 31, 2015
(U.S. dollars in thousands)	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Fixed maturities - Trading - Life Funds Withheld Assets
Due less than one year	$	8,177	$	8,831	$	4,573	$	5,096
Due after 1 through 5 years	290,320		291,356		278,163		272,220
Due after 5 through 10 years	314,590		320,720		280,487		277,920
Due after 10 years	722,772		756,432		668,737		649,592
	$	1,335,859	$	1,377,339	$	1,231,960	$	1,204,828
RMBS – Agency	1,917		1,869		370		368
CMBS	4,675		4,760		4,874		4,803
Other asset-backed securities	25,457		25,615		26,405		25,700
Total mortgage and asset-backed securities	$	32,049	$	32,244	$	31,649	$	30,871
Total fixed maturities - Trading - Life Funds Withheld Assets	$	1,367,908	$	1,409,583	$	1,263,609	$	1,235,699

Pledged Assets

Certain of the Company's invested assets are held in trust and pledged in support of insurance and reinsurance liabilities as well as credit facilities. Such pledges are largely required by the Company's operating subsidiaries that are "non-admitted" under U.S. state insurance regulations, in order for the U.S. cedant to receive statutory credit for reinsurance. Also included are Life Funds Withheld Assets as noted in Note 1, "Basis of Preparation and Consolidation." Additionally, certain deposit liabilities and annuity contracts require the use of pledged assets. As of March 31, 2016 and December 31, 2015, the Company had $19.0 billion and $18.3 billion in pledged assets, respectively.

(b) Gross Unrealized Losses

The following is an analysis of how long the AFS securities as of March 31, 2016 and December 31, 2015 had been in a continual unrealized loss position:

	Less than 12 months					Equal to or greater than 12 months
March 31, 2016 (U.S. dollars in thousands)	Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses
Fixed maturities and short-term investments - AFS
U.S. Government	$	465,423	$	(4,923	)	$	96,406	$	(2,984	)
Corporate – Financials	588,595		(18,228		)	141,508		(9,330		)
Corporate – Non Financials	930,465		(29,994		)	287,849		(25,073		)
RMBS – Agency	151,135		(1,128		)	327,657		(3,963		)
RMBS – Non-Agency	35,930		(1,867		)	175,881		(18,980		)
CMBS	31,661		(255		)	55,310		(2,470		)
CDOs	12,368		(509		)	9,359		(3,609		)
Other asset-backed securities	282,395		(2,113		)	60,638		(8,791		)
U.S. States and political subdivisions of the States	91,846		(379		)	15,528		(414		)
Non-U.S. Governments	965,976		(22,116		)	370,747		(35,912		)
Total fixed maturities and short-term investments - AFS	$	3,555,794	$	(81,512	)	$	1,540,883	$	(111,526	)
Total equity securities	$	365,368	$	(46,653	)	$	—	$	—

26

XL GROUP PLC

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

	Less than 12 months					Equal to or greater than 12 months
December 31, 2015 (U.S. dollars in thousands)	Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses
Fixed maturities and short-term investments - AFS
U.S. Government	$	3,762,869	$	(29,339	)	$	89,113	$	(5,044	)
Corporate – Financials	1,641,021		(13,280		)	102,022		(10,192		)
Corporate – Non Financials	3,275,270		(73,069		)	227,527		(24,706		)
RMBS – Agency	1,065,055		(10,046		)	221,211		(7,515		)
RMBS – Non-Agency	19,614		(1,104		)	180,146		(15,876		)
CMBS	118,605		(1,561		)	78,651		(2,769		)
CDOs	12,311		(516		)	20,096		(8,757		)
Other asset-backed securities	572,671		(5,252		)	57,563		(8,268		)
U.S. States and political subdivisions of the States	565,055		(6,609		)	12,259		(765		)
Non-U.S. Governments	1,921,286		(53,440		)	474,929		(46,714		)
Total fixed maturities and short-term investments - AFS	$	12,953,757	$	(194,216	)	$	1,463,517	$	(130,606	)
Total equity securities	$	356,742	$	(45,153	)	$	—	$	—

The Company had gross unrealized losses totaling $239.7 million on 1,934 securities out of a total of 8,763 held as of March 31, 2016 in its AFS - Excluding Life Funds Withheld Assets portfolio, which either it considers to be temporarily impaired or with respect to which it reflects non-credit losses on other-than-temporarily impaired assets. Individual security positions comprising this balance have been evaluated by management to determine the severity of these impairments and whether they should be considered other-than-temporary. Management believes it is more likely than not that the issuer will be able to fund sufficient principal and interest payments to support the current amortized cost.

(c) Net Realized Gains (Losses)

The following represents an analysis of net realized gains (losses) on investments:

Net Realized Gains (Losses) on Investments	Three months ended March 31,
(U.S. dollars in thousands)	2016			2015
Net realized gains (losses) on investments - excluding Life Funds Withheld Assets:
Gross realized gains	$	61,227		$	62,300
Gross realized losses on investments sold	(50,063		)	(47,122		)
OTTI on investments, net of amounts transferred to other comprehensive income	(19,580		)	(10,576		)
	$	(8,416	)	$	4,602
Net realized gains (losses) on investments and net unrealized gains (losses) on investments, Trading - Life Funds Withheld Assets:
Gross realized gains	$	62,850		$	53,128
Gross realized losses on investments sold	(28,434		)	(390		)
OTTI on investments, net of amounts transferred to other comprehensive income	(2,346		)	(5,209		)
Net unrealized gains (losses) on trading securities	$	69,096		$	760
	$	101,166		$	48,289
Total net realized gains (losses) on investments	$	92,750		$	52,891

The significant components of the net impairment charges of $19.6 million for investments excluding Life Funds Withheld Assets for the three months ended March 31, 2016 were:

▪ $9.8 million related to certain high yield securities where we determined that the likely recovery on these securities was below the carrying value.

▪ $7.0 million related to certain equities that were in a loss position for more than 11 months or impaired by more than 50% of their amortized cost.

▪ $0.6 million for structured securities, where we determined that the likely recovery on these securities was below the carrying value and, accordingly, recorded an impairment of the securities to the discounted value of the cash flows expected to be received on these securities.

27

XL GROUP PLC

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

▪ $0.3 million related to certain U.S. Municipal securities that we no longer intend to hold for a period sufficient to recover their fair value to amortized cost.

▪ $1.9 million related to foreign exchange losses.

The following table sets forth the amount of credit loss impairments on fixed income securities for which a portion of the OTTI loss was recognized in OCI and that were held by the Company as of the dates or for the periods indicated and the corresponding changes in such amounts.

Credit Loss Impairments	Three months ended March 31,
(U.S. dollars in thousands)	2016			2015
Opening balance as of beginning of indicated period	$	73,469		$	131,942
Credit loss impairment recognized in the current period on securities not previously impaired	10,567			7,560
Credit loss impairments previously recognized on securities that matured, paid down, prepaid or were sold during the period	(4,877		)	(28,539		)
Additional credit loss impairments recognized in the current period on securities previously impaired	230			141
Accretion of credit loss impairments previously recognized due to an increase in cash flows expected to be collected	(2,410		)	(2,646		)
Balance as of March 31,	$	76,979		$	108,458

7. Derivative Instruments

The Company enters into derivative instruments for both risk management and efficient portfolio management. The Company is exposed to potential loss from various market risks, and manages its market risks based on guidelines established by management and the Risk and Finance Committee of the Company's Board of Directors. The Company recognizes all derivatives as either assets or liabilities on the balance sheets and measures those instruments at fair value, with the changes in fair value of derivatives shown in the consolidated statement of income as "Net realized and unrealized gains (losses) on derivative instruments" unless the derivatives are designated as hedging instruments. The accounting for derivatives that are designated as hedging instruments is described in Item 8, Note 2(h), "Significant Accounting Policies - Derivative Instruments," to the Consolidated Financial Statements included in the Company's Annual Report on Form 10-K for the year ended December 31, 2015.

The following table summarizes information on the location and gross amounts of derivative fair values contained in the consolidated balance sheets as of March 31, 2016 and December 31, 2015:

	March 31, 2016								December 31, 2015
(U.S. dollars in thousands)	Asset Derivative Notional Amount		Asset Derivative Fair Value (1)		Liability Derivative Notional Amount		Liability Derivative Fair Value (1)		Asset Derivative Notional Amount		Asset Derivative Fair Value (1)		Liability Derivative Notional Amount		Liability Derivative Fair Value (1)
Derivatives designated as hedging instruments:
Foreign exchange contracts	$	1,216,823	$	50,707	$	1,001,752	$	54,387	$	1,667,585	$	64,289	$	674,976	$	11,941
Total derivatives designated as hedging instruments	$	1,216,823	$	50,707	$	1,001,752	$	54,387	$	1,667,585	$	64,289	$	674,976	$	11,941
Derivatives not designated as hedging instruments:
Investment Related Derivatives:
Foreign exchange exposure	199,007		2,501		46,628		534		102,234		2,888		144,707		1,702
Credit exposure	5,000		414		70,682		11,869		8,433		652		71,614		12,067
Financial market exposure	5		4		28,480		1,384		37		77		26,500		417

28

XL GROUP PLC

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

	March 31, 2016										December 31, 2015
(U.S. dollars in thousands)	Asset Derivative Notional Amount		Asset Derivative Fair Value (1)			Liability Derivative Notional Amount		Liability Derivative Fair Value (1)			Asset Derivative Notional Amount		Asset Derivative Fair Value (1)			Liability Derivative Notional Amount		Liability Derivative Fair Value (1)
Other Non-Investment Derivatives:
Foreign exchange contracts	188,400		2,492			—		—			194,566		2,009			—		—
Credit exposure	—		—			30,090		28			29,874		31			—		—
Guaranteed minimum income benefit contract	49,562		20,486			49,562		20,486			46,032		19,368			46,032		19,368
Modified coinsurance funds withheld contracts (2)	58,719		—			4,556,696		—			60,667		—			4,620,879		—
Total derivatives not designated as hedging instruments	$	500,693	$	25,897		$	4,782,138	$	34,301		$	441,843	$	25,025		$	4,909,732	$	33,554
Total derivatives			$	76,604				$	88,688				$	89,314				$	45,495
Counterparty netting			(37,870		)			(37,870		)			(3,087		)			(3,087		)
Total derivatives net of counterparty netting (1)			38,734					50,818					86,227					42,408
Cash collateral held/paid (3)			(5,520		)			(4,230		)			(30,958		)			—
Total derivatives as recorded in the balance sheets			$	33,214				$	46,588				$	55,269				$	42,408

____________

(1) Derivative instruments in an asset or liability position are included within Other assets or Other liabilities, respectively, in the balance sheets on a net basis where the Company has both a legal right of offset and the intention to settle the contracts on a net basis. The Company often enters into different types of derivative contracts with a single counterparty and these contracts are covered under netting agreements.

(2) The fair value movements in derivative assets and liabilities relating to modified coinsurance funds withheld contracts are included within the associated asset or liability at each period end on the face of the balance sheets. Notional amounts associated with reinsurance agreements under which the Company assumes reinsurance risk are recorded as asset derivative notional amounts. Notional amounts associated with the GreyCastle Life Retro Arrangements under which the Company cedes reinsurance risk are recorded as liability derivative notional amounts. Included in the liability derivative notional amount as of March 31, 2016 is the cumulative net realized and unrealized loss on life retrocession embedded derivative of $681.8 million.

(3) As of March 31, 2016, the Company held cash collateral related to foreign currency derivative positions and certain other derivative positions of $5.5 million for derivatives in an asset position and paid cash collateral of $4.2 million for derivatives in a liability position. As of December 31, 2015, the Company held cash collateral related to foreign currency derivative position and certain other derivative positions of $31.0 million for derivatives in an asset position and paid cash collateral of nil for derivatives in a liability position. The assets and liabilities related to the net collateral paid or held were recorded as Other assets and Other liabilities within the unaudited consolidated balance sheets as the collateral and derivative positions are not intended to be settled on a net basis.

(a) Derivative Instruments Designated as Fair Value Hedges

The Company may designate certain of its derivative instruments as fair value hedges or cash flow hedges and formally and contemporaneously documents all relationships between the hedging instruments and hedged items and links the hedging derivatives to specific assets and liabilities. The Company assesses the effectiveness of the hedge both at inception and on an on-going basis, and determines whether the hedge is highly effective in offsetting changes in fair value or cash flows of the linked hedged item.

The Company may use foreign exchange contracts to hedge the fair value of certain fixed income securities as well as to hedge certain net investments in foreign operations. For the three months ended March 31, 2016, there is no exposure to fair value hedges.

Settlement of Fair Value Hedges

A summary of the fair value hedges that have been settled and their impact on results during the indicated periods as well as the remaining balance of fair value hedges and average years remaining to maturity as of March 31, 2016 and 2015 are shown below:

Settlement of Fair Value Hedges - Summary	Fair Value Hedges - Deposit Liabilities March 31,
(U.S. dollars in thousands)	2016		2015
Cumulative reduction to interest expense	$	106,056	$	97,705
Remaining balance	127,139		135,490
Weighted average years remaining to maturity	21.2		22.2

29

XL GROUP PLC

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

(b) Derivative Instruments Designated as Hedges of the Net Investment in a Foreign Operation

The Company utilizes foreign exchange contracts to hedge the fair value of certain net investments in foreign operations. During the three months ended March 31, 2016 and 2015, the Company entered into foreign exchange contracts that were formally designated as hedges of investments in foreign subsidiaries, the majority of which have functional currencies of either U.K. sterling or the Euro. There was no ineffectiveness in these transactions.

The following table provides the weighted average U.S. dollar equivalent of foreign denominated net assets that were hedged and the resulting derivative gain (loss) that was recorded in the foreign currency translation adjustment, net of tax, account within AOCI for the three months ended March 31, 2016 and 2015:

Derivative Instruments Designated as Hedges of the Net Investment in a Foreign Operation - Summary	Three months ended March 31,
(U.S. dollars in thousands)	2016			2015
Weighted average of U.S. dollar equivalent of foreign denominated net assets	$	2,234,748		$	628,941
Derivative gains (losses) (1)	(11,515		)	66,770

____________

(1) Derivative gains (losses) from derivative instruments designated as hedges of the net investment in a foreign operation are recorded in the cumulative translation adjustment account within AOCI for each period.    

(c) Derivative Instruments Not Formally Designated As Hedging Instruments

The following table provides the total impact on earnings relating to derivative instruments not formally designated as hedging instruments under authoritative accounting guidance and from the ineffective portion of fair value hedges. The impacts are all recorded through Net realized and unrealized gains (losses) on derivatives in the income statement for the three months ended March 31, 2016 and 2015:

Net Realized and Unrealized Gains (Losses) on Derivative Instruments	Three months ended March 31,
(U.S. dollars in thousands)	2016			2015
Investment Related Derivatives:
Interest rate exposure	$	781		$	9,637
Foreign exchange exposure	(670		)	(1,362		)
Credit exposure	(163		)	82
Financial market exposure	(1,010		)	3,041
Other Non-Investment Derivatives:
Foreign exchange contracts	(1,181		)	2,059
Credit exposure	(303		)	1,346
Modified coinsurance funds withheld contract	(1,076		)	1,718
Net realized and unrealized gains (losses) on derivative instruments	$	(3,622	)	$	16,521
Net realized and unrealized gains (losses) on life retrocession embedded derivative and derivative instruments - Life Funds Withheld Assets	$	(236,080	)	$	(229,367	)

The Company’s objectives in using these derivatives are explained below.

(c)(i) Investment Related Derivatives

The Company, either directly or through its investment managers, may use derivative instruments within its investment portfolio, including interest rate swaps, inflation swaps, commodity contracts, total return swaps, credit derivatives (single name and index credit default swaps), options, forward contracts and financial futures (foreign exchange, bond and stock index futures), primarily as a means of economically hedging exposures to interest rate, credit spread, equity price changes and foreign currency risk or, in limited instances, for efficient portfolio management. When using cleared (exchange traded) derivatives, the Company is exposed to the credit risk of the applicable clearing house and of the Company's future commissions merchant. When using uncleared (over-the-counter) derivatives, the Company is exposed to credit risk in the event of non-performance by the counterparties under any derivative contracts, although the Company generally seeks to use credit support arrangements with counterparties to help manage this risk.

Investment Related Derivatives – Interest Rate Exposure

The Company utilizes risk management and overlay strategies that incorporate the use of derivative financial instruments, primarily to manage its fixed income portfolio duration and net economic exposure to interest rate risks. The Company may

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XL GROUP PLC

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also use interest rate swaps to convert certain liabilities from a fixed rate to a variable rate of interest or to convert a variable rate of interest from one basis to another.

Investment Related Derivatives – Foreign Exchange Exposure

The Company has exposure to foreign currency exchange rate fluctuations through its operations and in its investment portfolio. The Company uses foreign exchange contracts to manage its exposure to the effects of fluctuating foreign currencies on the value of certain of its foreign currency fixed maturities. These contracts are not designated as specific hedges for financial reporting purposes and, therefore, realized and unrealized gains and losses on these contracts are recorded in income in the period in which they occur. These contracts generally have maturities of twelve months or less.

In addition, certain of the Company's investment managers may, subject to investment guidelines, enter into forward contracts.

Investment Related Derivatives – Credit Exposure

Credit derivatives may be purchased within the Company's investment portfolio in the form of single name, basket or index credit default swaps and swaptions, which are used to mitigate credit exposure through a reduction in credit spread duration (i.e., macro credit strategies rather than single-name credit hedging) or exposure to securities of selected issuers, including issuers that are not held in the underlying fixed income portfolio.

Investment Related Derivatives – Financial Market Exposure

Stock index futures may be purchased within the Company's investment portfolio in order to create synthetic equity exposure and to add value to the portfolio with overlay strategies where market inefficiencies are believed to exist. From time to time, the Company may enter into other financial market exposure derivative contracts on various indices including, but not limited to, inflation and commodity contracts.

(c)(ii) Other Non-Investment Derivatives

Foreign Exchange Contracts

On January 9, 2015, the Company entered into the FX Forwards with Morgan Stanley Capital Services LLC and Goldman Sachs International. The purpose of the FX Forwards was to mitigate risk of foreign currency exposure related to the Catlin Acquisition. Following the closing of the Catlin Acquisition, the FX Forwards were settled.

In connection with the Catlin Acquisition and the FX Forwards, during 2015, certain foreign exchange contracts utilized to hedge the fair value of certain net investments in foreign operations were de-designated as hedging instruments; subsequently during the second quarter, the hedging relationships were then re-established.

In the fourth quarter of 2015, the Company entered into an average rate option to mitigate the risk of foreign currency exposure to certain cash flows denominated in U.K. sterling. The option will mature in the fourth quarter of 2016. Additionally, the Company has a small forward purchase to mitigate exposure to certain cash flows denominated in New Zealand dollars.

Credit Exposure

During the year ended December 31, 2014, the Company entered into a non-investment related credit derivative relating to a number of reference pool mortgage tranches associated with actual mortgage loans that were securitized into agency mortgage-backed securities and sold as Structured Agency Credit Risk Notes. As of March 31, 2016, there was no reported event of default on this obligation. The credit derivative is recorded at fair value based upon models developed by the Company. Significant unobservable inputs considered in the valuation include the impact of changes in interest rates, future default, delinquency and prepayment rates, credit spreads, changes in credit quality, and other market factors.

Guaranteed Minimum Income Benefit Contract

The Company also has derivatives embedded in certain reinsurance contracts. For a certain life reinsurance contract, the Company pays the ceding company a fixed amount equal to the estimated present value of the excess of the guaranteed benefit over the account balance upon the policyholder's election to take the income benefit. The fair value of this derivative is determined based on the present value of expected cash flows.

Modified Coinsurance and Funds Withheld Contracts

The Company has modified coinsurance and funds withheld reinsurance agreements that provide for a return to be paid to the Company based on a portfolio of fixed income securities. As such, the agreements contain an embedded derivative. The embedded derivative is bifurcated from the funds withheld balance and recorded at fair value with changes in fair value recognized in earnings through Net realized and unrealized gains (losses) on derivative instruments.

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XL GROUP PLC

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Modified Coinsurance Funds Withheld Reinsurance Agreements - Life Retrocession Embedded Derivative

In addition, the Company has entered into GreyCastle Life Retro Arrangements, as described in Note 1, "Basis of Preparation and Consolidation." The embedded derivative related to the GreyCastle Life Retro Arrangements is recorded at fair value with changes in fair value recognized in earnings through Net realized and unrealized gains (losses) on life retrocession embedded derivative and derivative instruments - Life Funds Withheld Assets.

The impact of the GreyCastle Life Retro Arrangements on the Company's results was as follows:

Impact of GreyCastle Life Retro Arrangements	Three months ended March 31,
(U.S. dollars in thousands)	2016			2015
Underwriting profit (loss) (1)	$	—		$	603
Net investment income - Life Funds Withheld Assets	41,560			50,419
Net realized gains (losses) on investments sold - Life Funds Withheld Assets	34,416			52,738
Net unrealized gains (losses) on investments, Trading - Life Funds Withheld Assets	69,096			760
OTTI on investments - Life Funds Withheld Assets	(2,346		)	(5,209		)
Exchange gains (losses)	11,119			3,684
Other income and expenses	(146		)	(1,298		)
Net realized and unrealized gains (losses) on life retrocession embedded derivative and derivative instruments - Life Funds Withheld Assets	(236,080		)	(229,367		)
Net income (loss)	$	(82,381	)	$	(127,670	)
Change in net unrealized gains (losses) on investments - Life Funds Withheld Assets, net of tax	51,990			37,115
Change in adjustments related to future policy benefit reserves, net of tax	17,035			60,356
Change in cumulative translation adjustment - Life Funds Withheld Assets, net of tax	13,356			30,802
Total changes to other comprehensive income as a result of GreyCastle Life Retro Arrangements	$	82,381		$	128,273
Comprehensive income (loss)	$	—		$	603

____________

(1) The underwriting profit of $0.6 million relates to a premium adjustment during the three months ended March 31, 2015 relating to the GreyCastle Life Retro Arrangements transaction. Excluding this transaction, the impact to comprehensive income relating to the GreyCastle Life Retro Arrangements was nil for the three months ended March 31, 2015.

As shown in the table above, although the Company's net income (loss) is subject to variability related to the GreyCasstle Life Retro Arrangements, there is minimal net impact on the Company's comprehensive income in any period. The life retrocession embedded derivative value includes the interest income, unrealized gains and losses, and realized gains and losses from sales on the Life Funds Withheld Assets.

The change in the value of the life retrocession embedded derivative includes the interest income, realized and unrealized gains and losses on Life Funds Withheld Assets and certain related expenses are as follows:

Components of Life Retrocession Embedded Derivative and Derivative Instruments - Life Funds Withheld Assets:	Three months ended March 31,
(U.S. dollars in thousands)	2016			2015
Interest income - Life Funds Withheld Assets	$	(43,110	)	$	(50,996	)
Realized and unrealized gains (losses) - Life Funds Withheld Assets	(174,932		)	(152,830		)
Other	146			96
Net realized and unrealized gains (losses) on life retrocession embedded derivative	$	(217,896	)	$	(203,730	)
Net adjustments related to future policy benefit reserves, net of tax	(22,053		)	(11,954		)
Net realized and unrealized gains (losses) on derivative instruments - Life Funds Withheld Assets	3,869			(13,683		)
Net realized and unrealized gains (losses) on life retrocession embedded derivative and derivative instruments - Life Funds Withheld Assets	$	(236,080	)	$	(229,367	)

(d) Contingent Credit Features

Certain derivative agreements entered into by the Company or its subsidiaries contain credit rating downgrade provisions that permit early termination of the agreements by the counterparty if collateral is not posted following failure to maintain certain credit ratings from one or more of the principal credit rating agencies. If the Company were required to terminate such agreements early due to a credit rating downgrade, it could potentially be in a net liability position at the time of settlement of such agreements. The aggregate fair value of all derivative agreements containing such rating downgrade provisions that were

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XL GROUP PLC

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

in a liability position and any collateral posted under these agreements as of March 31, 2016 and December 31, 2015 were as follows:

Contingent Credit Features - Summary: (U.S. dollars in thousands)	March 31, 2016		December 31, 2015
Aggregate fair value of derivative agreements with downgrade provisions in a net liability position	$	19,038	$	5,827
Collateral posted to counterparty	$	600	$	—

8. Goodwill and Other Intangible Assets

The Company has goodwill and intangible assets of $2.2 billion at March 31, 2016 and December 31, 2015.

In the first quarter of 2016, as a result of the transaction described in Note 3(a), "Acquisitions and Disposals - Allied Acquisition," the Company recognized additional intangible assets of $14.0 million. The transaction was accounted for using the acquisition method under which the Company recorded the identifiable assets acquired, including indefinite-lived and definite-lived intangible assets, and liabilities assumed, at their Acquisition Date fair values, and recorded the excess of consideration transferred over the net assets acquired as goodwill in the amount of $13.9 million.

In the third quarter of 2015, as a result of the transaction described in Note 3(b), "Acquisitions and Disposals - New Energy Risk," the Company recognized additional goodwill of approximately $13.4 million. The transaction was accounted for using the acquisition method under which the Company recorded the identifiable assets acquired and liabilities assumed at their acquisition date fair values, and recorded as goodwill the excess of the sum of a) over b) - in which a) represents the aggregate of: i) the consideration transferred, ii) the fair value of noncontrolling interest in the acquiree, and iii) the acquisition-date fair value of the Company's previously held equity interest in the acquiree; and b) represents the net assets acquired in the transaction.

In the second quarter of 2015, as a result of the transaction described in Item 8, Note 3(c), "Acquisitions and Disposals - Catlin Acquisition," to the Consolidated Financial Statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2015, the Company recognized additional intangible assets of $988.0 million. The transaction was accounted for using the acquisition method under which the Company recorded the identifiable assets acquired, including indefinite-lived and definite-lived intangible assets, and liabilities assumed, at their Acquisition Date fair values, and recorded the excess of consideration transferred over the net assets acquired as goodwill in the amount of $794.0 million.

The following table presents an analysis of intangible assets broken down between goodwill, intangible assets with an indefinite life and intangible assets with a definite life for the three months ended March 31, 2016:

(U.S. dollars in thousands)	Goodwill		Intangible assets with an indefinite life		Intangible assets with a definite life			Total
Balance at December 31, 2015	$	1,213,630	$	682,859	$	313,777		$	2,210,266
Additions	13,946		8,000		6,000			27,946
Amortization	—		—		(5,588		)	(5,588		)
Foreign Currency Translation	1,496		1,701		(2,224		)	973
Balance at March 31, 2016	$	1,229,072	$	692,560	$	311,965		$	2,233,597

9. Share Capital

(a) Authorized and Issued

Buybacks of Ordinary Shares

On August 6, 2015, XL-Ireland announced that its Board of Directors approved a share buyback program, authorizing the purchase of up to $1.0 billion of ordinary shares (the "August 2015 Program"). During the three months endedMarch 31, 2016, the Company purchased and canceled 10.0 million ordinary shares under the August 2015 Program for $355.1 million. As of March 31, 2016, $348.2 million remained available for purchase under the August 2015 Program.

(b) Stock Plans

The Company's performance incentive programs provide for grants of stock options, restricted stock, equity-classed restricted stock units, liability-classed restricted stock units, performance units and stock appreciation rights. Share-based compensation granted by the Company generally contains a vesting period of three or four years, and certain awards also contain performance conditions. The Company records compensation expense related to each award over its vesting period,

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XL GROUP PLC

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

incorporating the best estimate of the expected outcome of performance conditions where applicable. Compensation expense is generally recorded on a straight line basis over the vesting period of an award. See Item 8, Note 18, "Share Capital," to the Consolidated Financial Statements included in the Company's Annual Report on Form 10-K for the year ended December 31, 2015 for further information on the Company's performance incentive programs and associated accounting.

During the three months ended March 31, 2016, the Company granted approximately 2.2 million stock options with a weighted-average grant date fair value of $5.99 per option. The fair value of the options issued was estimated on the date of grant using the Black-Scholes option pricing model using the following weighted average assumptions:

Dividend yield	2.00	%
Risk free interest rate	1.37	%
Volatility	21.7	%
Expected lives	6.0 years

During the three months ended March 31, 2016, the Company granted approximately 1.1 million equity-classed restricted stock units to certain employees with an aggregate grant date fair value of approximately $38.3 million. Each equity-classed restricted stock unit represents the Company's obligation to deliver to the holder one ordinary share, and grants may vest in three or four equal installments upon the first, second, third and fourth anniversaries of the date of grant. Equity-classed restricted stock units are granted at the closing market price on the day of grant and entitle the holder to receive dividends declared and paid in the form of additional ordinary shares contingent upon vesting.

During the three months ended March 31, 2016, the Company granted approximately 1.8 million liability-classed cash units to certain employees with an aggregate grant date fair value of approximately $61.3 million. Each liability-classed restricted cash unit represents the Company's obligation to deliver to the holder a cash payment equivalent to the value of one ordinary share. The grants may vest either in three or four equal installments upon the first, second, third and fourth anniversaries of the date of grant. Liability-classed restricted stock units are granted at the closing market price on the day of grant and entitle the holder to receive dividends declared and are paid in cash contingent upon vesting.

During the three months ended March 31, 2016, the Company granted approximately 0.7 million performance units (representing a potential maximum share payout of approximately 1.5 million ordinary shares) to certain employees with an aggregate grant date fair value of approximately $25.6 million. Each grant of performance units has a target number of shares, with final payouts ranging from 0% to 200% of the grant amount depending upon the achievement of stated relative and absolute financial performance metrics along with each employee's continued service through the vesting date. Performance units granted in the current year are granted at the closing market price on the day of grant and entitle the holder to receive dividends declared and paid in the form of additional ordinary shares contingent upon vesting. Performance units issued in 2015 had different performance metrics, please see Item 8, Note 18, "Share Capital," to the Consolidated Financial Statements included in the Company's Annual Report on Form 10-K for the year ended December 31, 2015.

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XL GROUP PLC

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

10. Notes Payable and Debt and Financing Arrangements

(a) Notes Payable and Debt

The following table presents the Company's outstanding notes payable and debt at March 31, 2016 and December 31, 2015:

(U.S. dollars in thousands)	March 31, 2016				December 31, 2015
	Commitment/ Debt (1)		In Use/ Outstanding (2)		Commitment/ Debt (1)		In Use/ Outstanding (2)
Debt:
2.30% Senior Notes due 2018	$	300,000	$	298,183	$	300,000	$	298,015
5.75% Senior Notes due 2021	400,000		397,630		400,000		397,523
6.375% Senior Notes due 2024	350,000		349,057		350,000		349,029
4.45% Subordinated Notes due 2025	500,000		492,723		500,000		492,521
6.25% Senior Notes due 2027	325,000		323,257		325,000		323,218
Trust Preferred Securities, face amount $8m, due 2035	8,248		8,248		—		—
5.25% Senior Notes due 2043	300,000		296,328		300,000		296,294
5.5% Subordinated Notes due 2045	500,000		488,469		500,000		488,370
Total debt carrying value	$	2,683,248	$	2,653,895	$	2,675,000	$	2,644,970

_______________

(1) Excluded from the table are certain credit facilities under which the Company is permitted to utilize up to $1.4 billion at March 31, 2016 and December 31, 2015, respectively, for revolving loans to support general operating and financing needs. However, at March 31, 2016 and December 31, 2015, $526.5 million and $527.1 million, respectively, were utilized under these facilities to issue letters of credit, leaving $823.5 million and $822.9 million, respectively, available to support other operating and financing needs.

(2)    "In Use/Outstanding" data represent March 31, 2016 and December 31, 2015 accreted values.

With the exception of the trust preferred securities assumed as a result of the Allied Acquisition, as described below, all outstanding debt of the Company at March 31, 2016 and December 31, 2015 was issued by XL-Cayman, a 100% owned subsidiary of XL-Ireland. XL-Ireland does not have significant assets or operations independent of XL-Cayman. XL-Cayman's outstanding debt is fully and unconditionally guaranteed by XL-Ireland. The ability of XL-Cayman, like that of the Company, to obtain funds from its subsidiaries to satisfy any of its obligations, including under guarantees, is subject to certain contractual restrictions, applicable laws and statutory requirements of the various countries in which the subsidiaries operate, including, among others, Bermuda, the United States, Ireland, Switzerland and the United Kingdom. For details of the required statutory capital and surplus for the principal operating subsidiaries of the Company, see Item 8, Note 23, "Statutory Financial Data," to the Consolidated Financial Statements included in the Company's Annual Report on Form 10-K for the year ended December 31, 2015.

On March 30, 2015, XL-Cayman issued $500 million of subordinated notes due March 2025, with a fixed coupon of 4.45%, that are guaranteed by XL-Ireland. The notes are listed on the New York Stock Exchange. The notes were issued at 99.633% of the face amount and net proceeds were $492.2 million. Related expenses of the offering amounted to approximately $5.9 million. These costs were deferred and will be amortized over the term of the subordinated notes.

On March 30, 2015, XL-Cayman issued $500 million of subordinated notes due March 2045, with a fixed coupon of 5.5%, that are guaranteed by XL-Ireland. The notes are listed on the New York Stock Exchange. The notes were issued at 99.115% of the face amount and net proceeds were $488.4 million. Related expenses of the offering amounted to approximately $7.2 million. These costs were deferred and will be amortized over the term of the subordinated notes.

As a result of the Allied Acquisition described in Note 3(a), "Acquisitions and Disposals - Allied Acquisition," the Company assumed $8.2 million of trust preferred securities, due in 2035 and bearing a floating interest rate, adjustable quarterly, at three-month LIBOR plus 3.75%. The Company has given notice that these securities will be retired at the next interest payment date on June 15, 2016.

XL-Cayman and the Company were in compliance with all covenants at March 31, 2016, and XL-Cayman and the Company currently remain in compliance with all covenants.

(b) Letter of Credit Facilities and Other Sources of Collateral

The Company has letter of credit facilities provided on both syndicated and bilateral bases from commercial banks. These facilities are utilized primarily to support non-admitted insurance and reinsurance operations in the U.S. and capital requirements at Lloyd’s.

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XL GROUP PLC

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

The Company’s letter of credit facilities and revolving credit facilities as of March 31, 2016 and December 31, 2015 were as follows:

Letter of Credit Summary: (U.S. dollars in thousands except percentages)	March 31, 2016 (1)			December 31, 2015 (1)
Available letter of credit facilities - commitments	$	4,503,617		$	4,463,041
Available letter of credit facilities - in use (2)	$	2,548,085		$	2,515,653
Collateralized by certain assets of the Company’s investment portfolio	51.3		%	50.9		%

____________

(1) As of March 31, 2016 and December 31, 2015, there were fifteen available credit facilities

(2) As of March 31, 2016 and December 31, 2015 the stated portion of allowable credit facilities permitted to be utilized for revolving loans was $1.4 billion. However, as of March 31, 2016 and December 31, 2015, $526.5 million and $527.1 million, respectively, of such facilities' limits were utilized to issue letters of credit, leaving $823.5 million and $822.9 million, respectively, available either to issue additional letters of credit or to support other operating or financing needs under these particular facilities.

For details regarding the facilities, see Item 8, Note 14(b), "Notes Payable and Debt and Financing Arrangements - Letter of Credit Facilities and Other Sources of Collateral," to the Consolidated Financial Statements included in our Annual Report on Form 10-K for the year ended December 31, 2015.

11. Related Party Transactions

(a)    Investment Manager Affiliates

At March 31, 2016 and 2015, the Company owned minority stakes in six independent investment management companies ("Investment Manager Affiliates") that are actively managing client capital and seeking growth opportunities. The Company seeks to develop relationships with specialty investment management organizations, generally acquiring an equity interest in the business. The Company also invests in certain of the funds and limited partnerships and other legal entities managed by these affiliates and through these funds and partnerships pays management and performance fees to the Company's Investment Manager Affiliates. In addition, the company owned minority stakes in two independent firms as of March 31, 2016 and one independent firm as of March 31, 2015, that provide technology and other services to alternative asset managers and allocators. The results of the Company's interests in these enterprises are included in Investment Manager Affiliates. The Company pays fees to these Investment Manager Affiliates in exchange for them providing their services to the Company. See Item 8, Note 7, "Investments in Affiliates," to the Consolidated Financial Statements included in our Annual Report on Form 10-K for the year ended December 31, 2015.

(b)    Assumed Reinsurance Contracts

In the normal course of business, the Company enters into assumed reinsurance contracts with certain of its other strategic affiliates, or their subsidiaries. Management believes that these transactions are conducted at market rates consistent with negotiated arm's-length contracts. During the three months ended March 31, 2016 and 2015, these contracts resulted in reported net premiums, reported net losses, and reported net acquisition costs as summarized below:

(U.S. dollars in thousands)	Three months ended March 31,
	2016		2015
Reported net premiums	$	24,016	$	27,076
Reported net losses	$	12,060	$	9,100
Reported net acquisition costs	$	11,604	$	9,012

Results through April 1, 2015 include amounts under an assumed reinsurance contract with a wholly-owned subsidiary of ARX, an insurance operating affiliate of the Company to that date. The Company disposed of its investment in ARX on April 1, 2015, and thus, after that date, all amounts under this contract are no longer reported as related party transactions. See Note 3(d), "Acquisitions and Disposals - Sale of Strategic Operating Affiliate."

(c)    New Ocean

Commencing in 2014, several of the Company’s wholly-owned subsidiaries retrocede assumed reinsurance business to special purpose reinsurers that receive capital from funds managed by the Company's subsidiary, New Ocean Capital Management Limited, a Bermuda based company ("New Ocean"), as discussed in Note 12, "Variable Interest Entities". Underwriting administration services are provided to the special purpose reinsurers by other subsidiaries of the Company under service fee agreements negotiated at arm's-length, while investment advisory services are provided by New Ocean. During the

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XL GROUP PLC

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three months endedMarch 31, 2016, ceded premiums earned, ceded losses and loss expenses incurred, ceding commission income, and other fee income related to these retrocessional contracts were not material to the Company.

(d)    New Energy

On July 24, 2015, as described in Note 3(b), "Acquisitions and Disposals - New Energy Risk," the Company completed its acquisition of an additional 63.63% of the shares of New Energy for approximately $8.8 million, increasing its ownership of the entity to a majority portion of 94.79%. These shares are held within the XL Innovate Fund. A substantial portion of the additional shares were purchased directly from the family trusts of a Company employee, based on a market valuation of New Energy performed by an independent third party provider. The remaining 5.21% of equity shares of New Energy held by the family trusts of the employee were then contributed in-kind to XL Innovate Fund based on the share price implied by the independent valuation. Such contribution was made in partial satisfaction of the employee's aggregate 5.21% investment commitment to the Fund and resulted in XL Innovate Fund owning 100% of the net equity of New Energy, and the family trusts of the employee owning a 5.21% non-controlling equity interest in XL Innovate Fund. The employee serves as a member of the board of directors of both New Energy and XL Innovate Fund, and maintains responsibility over the business generated by New Energy. There were no other material transactions between the Company and this employee for the three months endedMarch 31, 2016.

12. Variable Interest Entities

At times, the Company has utilized VIEs both indirectly and directly in the ordinary course of the Company's business. Within its investment portfolio, the Company has holdings in hedge funds, private equity and other investment vehicles. A number of these vehicles are considered VIEs based on their legal form and the generally passive role of their investors.  As the Company lacks the ability to control the activities which most significantly impact the economic performance of these VIEs, the Company is not considered the primary beneficiary and does not consolidate these entities. The activities of the entities are generally limited to holding investments. The exposure to loss from these investments is limited to the carrying value of the investments at the balance sheet date.

During the third quarter of 2013, the Company, along with other investors, formed New Ocean to act as an investment manager focused on providing third-party investors access to insurance-linked securities and other insurance and reinsurance capital markets products. The Company holds a majority voting interest in New Ocean through its ownership of common shares and, accordingly, the financial statements of New Ocean have been included in the consolidated financial statements of the Company. None of the assets, liabilities, revenues or net income of New Ocean were material to the Company during the three months endedMarch 31, 2016. The equity interest attributable to third party investors in New Ocean recorded in the Company’s Unaudited Consolidated Balance Sheets as "Non-controlling interest in equity of consolidated subsidiaries" was $0.7 million and $0.4 million as of March 31, 2016 and December 31, 2015, respectively.

During the fourth quarter of 2013, the Company, along with other investors, invested in a new Bermuda-based company, New Ocean Focus Cat Fund Ltd. ("New Ocean FCFL"), which is considered a VIE under GAAP. During the second quarter of 2014, the Company formed another new Bermuda-based investment company, New Ocean Market Value Cat Fund, Ltd. ("New Ocean MVCFL"), which is also considered a VIE under GAAP. New Ocean MVCFL primarily invests in insurance-linked securities, with a current focus on catastrophe bonds.

During the year ended December 31, 2014, New Ocean FCFL invested in a special purpose Bermuda reinsurer, Vector Reinsurance Ltd ("Vector Re"), formed for the purpose of underwriting collateralized excess of loss reinsurance with a focus on global property catastrophe risks. During the first quarter of 2015, New Ocean MVCFL also invested in Vector Re. Most of Vector Re’s current underwriting activity relates to reinsurance business assumed from the Company's subsidiaries. Underwriting administration and claims services are provided to Vector Re by the Company under service fee contracts, while investment advisory services are provided by New Ocean.

The Company currently holds majority equity interests, which are considered to be the controlling financial interests, in New Ocean FCFL and New Ocean MVCFL, and by extension, Vector Re. Accordingly, included in the consolidated financial statements of the Company are the total net assets of New Ocean FCFL, New Ocean MVCFL and Vector Re of $178.5 million and $175.8 million as of March 31, 2016 and December 31, 2015, respectively. The Company’s shares of revenue and net income in these VIEs were not material to the Company for the three months endedMarch 31, 2016. All inter-company transactions between the Company's entities have been eliminated in consolidation. The equity interest attributable to third party investors in New Ocean FCFL, New Ocean MVCFL and Vector Re that was recorded in the Company’s Consolidated Balance Sheets as "Non-controlling interest in equity of consolidated subsidiaries" was $71.2 million and $70.5 million as of March 31, 2016 and December 31, 2015, respectively.

37

XL GROUP PLC

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

13. Computation of Earnings Per Ordinary Share and Ordinary Share Equivalent

The following table sets forth the computation of basic and diluted earnings per ordinary share for the three months ended March 31, 2016 and 2015:

	Three Months Ended March 31,
(In thousands, except per share amounts)	2016		2015
Basic earnings per ordinary share & ordinary share equivalents outstanding:
Net income (loss) attributable to ordinary shareholders	$	21,885	$	36,281
Weighted average ordinary shares outstanding, in thousands - basic	291,969		255,724
Basic earnings per ordinary share & ordinary share equivalents outstanding	$	0.07	$	0.14
Diluted earnings per ordinary share & ordinary share equivalents outstanding:
Weighted average ordinary shares outstanding - basic	291,969		255,724
Impact of share-based compensation	4,697		4,980
Weighted average ordinary shares outstanding - diluted	296,666		260,704
Diluted earnings per ordinary share & ordinary share equivalents outstanding	$	0.07	$	0.14
Dividends per ordinary share	$	0.20	$	0.16

For the three months ended March 31, 2016 and 2015, ordinary shares available for issuance under share-based compensation plans of 6.0 million and 5.0 million, respectively, were not included in the calculation of diluted earnings per ordinary share because the assumed exercise or issuance of such shares would be anti-dilutive.

14. Commitments and Contingencies

(a) Financial Guarantee Exposures

The Company's outstanding financial guarantee contracts as of March 31, 2016 provide credit support for a variety of collateral types with the exposures comprised of an aggregate amount of $80.8 million notional financial guarantee on two notes backed by zero coupon long dated bonds and bank perpetual securities, including some issued by European financial institutions. As of March 31, 2016 and December 31, 2015, the total gross claim liability recorded was nil and the contracts had a weighted average contractual term to maturity of 23.9 years and 24.2 years, respectively.

Surveillance procedures to track and monitor credit deteriorations in the insured financial obligations are performed by the primary obligors for each transaction on the Company's behalf. Information regarding the performance status and updated exposure values is provided to the Company on a quarterly basis and evaluated by management in recording claims reserves. As of March 31, 2016, there were no reported events of default on these obligations.

(b) Litigation

The Company and its subsidiaries are subject to litigation and arbitration in the normal course of business. These lawsuits and arbitrations principally involve claims on policies of insurance and contracts of reinsurance and are typical for the Company and for the property and casualty insurance and reinsurance industry in general. Such claims proceedings are considered in connection with the Company's loss and loss expense reserves. Reserves in varying amounts may or may not be established in respect of particular claims proceedings based on many factors, including the legal merits thereof. In addition to litigation relating to insurance and reinsurance claims, the Company and its subsidiaries are subject to lawsuits and regulatory actions in the normal course of business that do not arise from or directly relate to claims on insurance or reinsurance policies. This category of business litigation typically involves, among other things, allegations of underwriting errors or misconduct, employment claims, regulatory activity, shareholder disputes or disputes arising from business ventures. The status of these legal actions is actively monitored by management.

Legal actions are subject to inherent uncertainties, and future events could change management's assessment of the probability or estimated amount of potential losses from pending or threatened legal actions. Based on available information, it is the opinion of management that the ultimate resolution of pending or threatened legal actions other than claims proceedings, both individually and in the aggregate, will not result in losses having a material adverse effect on the Company's financial position or liquidity as of March 31, 2016.

If management believes that, based on available information, it is at least reasonably possible that a material loss (or additional material loss in excess of any accrual) will be incurred in connection with any legal actions other than claims proceedings, the Company discloses an estimate of the possible loss or range of loss, either individually or in the aggregate, as

38

XL GROUP PLC

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

appropriate, if such an estimate can be made, or discloses that an estimate cannot be made. Based on the Company's assessment as of March 31, 2016, no such disclosures were considered necessary.

15. Accumulated Other Comprehensive Income (Loss)

The changes in AOCI, net of tax, by component for the three months ended March 31, 2016 and 2015 are as follows:

Three months ended March 31, 2016 (U.S. dollars in thousands)	Unrealized Gains (Losses) on Investments (1)			OTTI Losses Recognized in AOCI			Foreign Currency Translation Adjustments			Underfunded Pension Liability			Cash Flow Hedge			Total
Balance, beginning of period, net of tax	$	803,094		$	(57,502	)	$	(36,503	)	$	(24,641	)	$	2,168		$	686,616
OCI before reclassifications	575,022			—			(15,416		)	(1,049		)	—			558,557
Amounts reclassified from AOCI	(117,114		)	2,311			—			—			(39		)	(114,842		)
Tax benefit (expense)	(34,707		)	(44		)	(1,023		)	—			—			(35,774		)
Net current period OCI - net of tax	423,201			2,267			(16,439		)	(1,049		)	(39		)	407,941
Balance, end of period, net of tax	$	1,226,295		$	(55,235	)	$	(52,942	)	$	(25,690	)	$	2,129		$	1,094,557
Three months ended March 31, 2015 (U.S. dollars in thousands)
Balance, beginning of period, net of tax	$	1,590,114		$	(76,047	)	$	(11,188	)	$	(20,789	)	$	2,368		$	1,484,458
OCI before reclassifications	254,267			—			32,404			975			—			287,646
Amounts reclassified from AOCI	(74,781		)	9,936			—			—			95			(64,750		)
Tax benefit (expense)	(5,805		)	(78		)	3,699			—			—			(2,184		)
Net current period OCI - net of tax	173,681			9,858			36,103			975			95			220,712
Balance, end of period, net of tax	$	1,763,795		$	(66,189	)	$	24,915		$	(19,814	)	$	2,463		$	1,705,170

____________

(1) For certain annuity contracts that are subject to the GreyCastle Life Retro Arrangements, policy benefit reserves were historically increased for the impact of changes in unrealized gains on investments supporting such contracts as if the gains had been realized, with a corresponding entry to other comprehensive income ("Shadow Adjustments"). As of December 31, 2015, the cumulative impact of the Shadow Adjustments was $274.4 million. During the three months ended March 31, 2016, net movements of $(17.0) million were recorded, resulting in a total cumulative net impact of Shadow Adjustments on future policy benefit reserves of $257.4 million as of March 31, 2016.

39

XL GROUP PLC

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

The reclassifications out of AOCI along with the associated income statement line items affected by component, and the total related tax (expense) benefit for the three months ended March 31, 2016 and 2015 are as follows:

Gross Amount Reclassified From AOCI
Details About AOCI Components (U.S. dollars in thousands)	Three months ended March 31, 2016			Three months ended March 31, 2015			Affected Line Item in the Statement of Income
Unrealized gains and losses on investments:
	$	(116,988	)	$	(78,551	)	Net realized gains (losses) on investments sold and net unrealized gains (losses) on investments Trading
	21,928			15,724			OTTI on investments
	$	(22,054	)	$	(11,954	)	Net realized and unrealized gains (losses) on life retrocession embedded derivative and derivative instruments - Life Funds Withheld Assets
	$	(117,114	)	$	(74,781	)	Total before tax
	1,577			87			Provision (benefit) for income tax
	$	(115,537	)	$	(74,694	)	Net of tax
OTTI losses recognized in OCI:
	$	2,313		$	9,875		Net realized gains (losses) on investments sold
	(2		)	61			OTTI on investments transferred to (from) OCI
	$	2,311		$	9,936		Total before tax
	(44		)	(3		)	Provision (benefit) for income tax
	$	2,267		$	9,933		Net of tax
Gains and losses on cash flow hedges:
Interest rate contracts	$	(39	)	$	95		Interest Expense
	—			—			Provision (benefit) for income tax
	$	(39	)	$	95		Net of tax
Total reclassifications for the period, gross of tax	$	(114,842	)	$	(64,750	)
Tax benefit (expense)	1,533			84
Total reclassifications for the period, net of tax	$	(113,309	)	$	(64,666	)

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ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

GENERAL

The following is a discussion of our financial condition, liquidity and results of operations. Certain aspects of our business have loss experience characterized as low frequency and high severity. This may result in volatility from period to period in both the Company's and an individual segment's results of operations and financial condition. Unless the context otherwise indicates, references herein to "the Company," "we," "us," or "our" are to XL Group plc, an Irish public limited company ("XL-Ireland"), and its consolidated subsidiaries.

This "Management's Discussion and Analysis of Financial Condition and Results of Operations" contains forward-looking statements that involve inherent risks and uncertainties. Statements that are not historical facts, including statements about our beliefs and expectations, are forward-looking statements. These statements are based upon current plans, estimates and expectations. Actual results may differ materially from those projected in such forward-looking statements and, therefore, undue reliance should not be placed on them. See "Cautionary Note Regarding Forward-Looking Statements" for a list of additional factors that could cause actual results to differ materially from those contained in any forward-looking statement, as well as Item 1A, "Risk Factors," included in our Annual Report on Form 10-K for the year ended December 31, 2015.

This discussion and analysis should be read in conjunction with the "Management's Discussion and Analysis of Financial Condition and Results of Operations" and the audited Consolidated Financial Statements and Notes thereto reported in Items 7 and 8, respectively, of our Annual Report on Form 10-K for the year ended December 31, 2015.

CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS

The Private Securities Litigation Reform Act of 1995 ("PSLRA") provides a "safe harbor" for forward-looking statements. Any prospectus, prospectus supplement, Annual Report to ordinary shareholders, proxy statement, Form 10-K, Form 10-Q or Form 8-K or any other written or oral statements made by us or on our behalf may include forward-looking statements that reflect our current views with respect to future events and financial performance. Such statements include forward-looking statements both with respect to us in general, and to the insurance and reinsurance sectors in particular (both as to underwriting and investment matters). Statements that include the words "expect," "estimate," "intend," "plan," "believe," "project," "anticipate," "may," "could," or "would" and similar statements of a future or forward-looking nature identify forward-looking statements for purposes of the PSLRA or otherwise.

All forward-looking statements address matters that involve risks and uncertainties. Accordingly, there are or will be important factors that could cause actual results to differ materially from those indicated in such statements. We believe that these factors include, but are not limited to, the following:

▪ changes in the size of our claims relating to unpredictable natural or man-made catastrophe losses, such as hurricanes, typhoons, floods, nuclear accidents or terrorism, due to the preliminary nature of some reports and estimates of loss and damage to date;

▪ the continuation of downward trends in rates for property and casualty insurance and reinsurance;

▪ changes in the amount or type of business that we write, whether due to our actions, changes in market conditions or other factors, and the amount of premium attributable to those businesses;

▪ the availability, cost or quality of ceded reinsurance, and the timely and full recoverability of such reinsurance, or other amounts due to us, or changes to our projections relating to such recoverables;

▪ actual loss experience from insured or reinsured events and the timing of claims payments being faster or the receipt of reinsurance recoverables being slower than we anticipated;

▪ increased competition on the basis of pricing, capacity, coverage terms or other factors, such as the increased inflow of third-party capital into reinsurance markets, which could harm our ability to maintain or increase our business volumes or profitability;

▪ greater frequency or severity of claims and loss activity than our underwriting, reserving or investment practices anticipate based on historical experience or industry data;

▪ the impact of changes in the global financial markets, such as the effects of inflation on our business including on pricing and reserving, changes in interest rates, credit spreads and foreign currency exchange rates and future volatility in the world's credit, financial and capital markets that adversely affect the performance and valuation of our investments, future financing activities and access to such markets, our ability to pay claims or our general financial condition;

▪ The effects of climate change (such as changes to weather patterns, sea levels or temperatures) on our business, which our modeling or risk management practices may not adequately address due to the uncertain nature of climate change;

▪ our ability to successfully implement our business strategy;

41

▪ our ability to successfully attract and raise additional third party capital for existing or new investment vehicles;

▪ changes in credit ratings or rating agency policies or practices, which could trigger cancelation provisions in our assumed reinsurance agreements or an event of default under our credit facilities;

▪ the potential for changes to methodologies, estimations and assumptions that underlie the valuation of our financial instruments, that could result in changes to investment valuations;

▪ changes to our assessment as to whether it is more likely than not that we will be required to sell, or have the intent to sell, available for sale fixed maturity securities before their anticipated recovery;

▪ unanticipated constraints on our liquidity, including the availability of borrowings and letters of credit under our credit facilities, that inhibit our ability to support our operations, including our ability to underwrite policies and pay claims;

▪ the ability of our subsidiaries to pay dividends to XL-Ireland and XL-Cayman and Catlin Insurance Company Ltd;

▪ changes in regulators or regulation applicable to us, including as a result of the completion of our proposed redomestication from Ireland to Bermuda, such as changes in regulatory capital balances that our operating subsidiaries must maintain, or to our brokers or customers;

▪ the effects of business disruption, economic contraction or economic sanctions due to unpredictable global political and social conditions such as war, terrorism or other hostilities, or pandemics;

▪ the actual amount of new and renewal business and acceptance of our products and services, including new products and services and the materialization of risks related to such products and services;

▪ changes in the distribution or placement of risks due to increased consolidation of insurance and reinsurance brokers;

▪ bankruptcies or other financial concerns of companies insofar as they affect P&C insurance and reinsurance coverages or claims that we may have as a counterparty;

▪ the loss of key personnel;

▪ the effects of mergers, acquisitions and divestitures, including our ability to modify our internal control over financial reporting, changes to our risk appetite and our ability to realize the strategic value or financial benefits expected, in each case, as a result such transactions;

▪ changes in general economic conditions, including the impact of the withdrawal of the U.K. from the E.U., should it occur, new or continued sovereign debt concerns in Euro-Zone countries or emerging markets such as Brazil or China, or governmental actions for the purpose of stabilizing financial markets;

▪ changes in applicable tax laws, tax treaties or tax regulations or the interpretation or enforcement thereof;

▪ judicial decisions and rulings, new theories of liability or emerging claims coverage issues, legal tactics and settlement terms; and

• the other factors set forth in Item 1A, "Risk Factors," included in our Annual Report on Form 10-K for the year ended December 31, 2015 and our other documents on file with the SEC.

The foregoing review of important factors should not be construed as exhaustive and should be read in conjunction with the other cautionary statements that are included herein or elsewhere. We undertake no obligation to update publicly or revise any forward-looking statement, whether as a result of new information, future developments or otherwise, except as required by the federal securities laws.

EXECUTIVE OVERVIEW

See "Management's Discussion and Analysis of Financial Condition and Results of Operations - Executive Overview" included in Item 7 of our Annual Report on Form 10-K filed for the year ended December 31, 2015.

RESULTS OF OPERATIONS AND KEY FINANCIAL MEASURES

Results of Operations

The following table presents an analysis of our net income (loss) attributable to ordinary shareholders and other financial measures (described below) for the three months ended March 31, 2016 and 2015:

(U.S. dollars in thousands, except per share amounts)	Three Months Ended
	March 31,
	2016		2015
Net income (loss) attributable to ordinary shareholders	$	21,885	$	36,281
Earnings (loss) per ordinary share – basic	$	0.07	$	0.14
Earnings (loss) per ordinary share – diluted	$	0.07	$	0.14
Weighted average number of ordinary shares and ordinary share equivalents, in thousands – basic	291,969		255,724
Weighted average number of ordinary shares and ordinary share equivalents, in thousands – diluted	296,666		260,704

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Key Financial Measures

The following are some of the financial measures management considers important in evaluating our operating performance:

	Three Months Ended
	March 31,						Change
(U.S. dollars in thousands, except ratios and per share amounts)	2016			2015			2016 to 2015
Underwriting profit (loss) - P&C operations	$	175,489		$	146,836		19.5		%
Combined ratio - P&C operations	92.5		%	88.9		%	3.6pts
Net investment income - P&C operations (1)	$	155,793		$	147,884		5.3		%
Operating net income (2)	$	103,388		$	194,376		(46.8		)%
Operating net income per ordinary share (2)	$	0.35		$	0.75		$	(0.40	)
Annualized return on average ordinary shareholders’ equity (2)	0.7		%	1.4		%	(0.7)pts
Annualized operating return on average ordinary shareholders’ equity (2)	3.5		%	7.7		%	(4.2)pts
Annualized operating return on average ordinary shareholders’ equity excluding unrealized gains and losses on investments (2)	3.9		%	9.1		%	(5.2)pts
(U.S. dollars)	March 31, 2016			December 31, 2015			Change (Three Months)
Book value per ordinary share (2)	$	40.83		$	39.61		$	1.22
Fully diluted tangible book value per ordinary share (2)	$	32.62		$	31.52		$	1.10

____________

(1) Net investment income - P&C operations includes all net investment income related to the net results from structured products and excludes all net investment income from the assets supporting the Life Funds Withheld Assets, as defined in Item 1, Note 1, "Basis of Preparation and Consolidation," to the Unaudited Consolidated Financial Statements included herein.

(2) Represents a non-GAAP financial measure as discussed further below.

The following are descriptions of these key financial measures and a brief discussion of the factors influencing them:

Underwriting profit – property and casualty insurance and reinsurance ("P&C") operations

One way that we evaluate the performance of our P&C operations is by underwriting profit or loss. We do not measure performance based on the amount of gross premiums written. Underwriting profit or loss is calculated from premiums earned less net losses incurred and expenses related to underwriting activities.

In the following discussion, as well as in the "Income Statement Analysis" section, the following ratios are used to explain the underwriting profit (loss) from our P&C operations:

▪ The combined ratio related to the P&C operations is the sum of the loss and loss expense ratio and the underwriting expense ratio. A combined ratio under 100% represents an underwriting profit and over 100% represents an underwriting loss. In the P&C industry, the combined ratio is a widely used measure of underwriting profitability.

▪ The loss and loss expense ratio related to the P&C operations is calculated by dividing the losses and loss expenses incurred by the net premiums earned for the Insurance and Reinsurance segments.

▪ The underwriting expense ratio related to the P&C operations is the sum of acquisition costs and operating expenses for the Insurance and Reinsurance segments divided by net premiums earned for the Insurance and Reinsurance segments.

▪ The acquisition expense ratio related to the P&C operations is calculated by dividing the acquisition costs incurred by the net premiums earned for the Insurance and Reinsurance segments.

▪ The operating expense ratio related to the P&C operations is calculated by dividing the operating expenses incurred by the net premiums earned for the Insurance and Reinsurance segments.

Movements in our underwriting profit (loss) in the three months ended March 31, 2016 and 2015 are discussed in conjunction with our combined ratio below.

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Combined ratio – P&C operations

The following table presents the ratios for our P&C operations for the three months ended March 31, 2016 and 2015:

	Three Months Ended
	March 31,				Change
	2016		2015		2016 to 2015
Loss and loss expense ("loss") ratio	58.8	%	58.3	%	0.5
Acquisition expense ratio	17.1	%	11.5	%	5.6
Operating expense ratio	16.6	%	19.1	%	(2.5	)
Underwriting expense ratio	33.7	%	30.6	%	3.1
Combined ratio	92.5	%	88.9	%	3.6

Three months ended March 31, 2016 vs. 2015: The 3.6 percentage point increase in our combined ratio was mainly the result of an underwriting expense ratio increase of 3.1 percentage points, driven by an increase in commissions expense in both segments as a result of the Catlin Acquisition, partially offset by integration synergies realized in operating expense.

For further information on our combined ratio, see "Income Statement Analysis" below.

Net investment income - P&C Operations

Net investment income - P&C operations, which includes interest and dividend income together with the amortization of premium and discount on fixed maturities and short-term investments, net of related investment expenses, is an important measure that affects our overall profitability. Our largest liability relates to our unpaid loss reserves, and our investment portfolio provides liquidity for claims settlements of these reserves as they become due. As a result, a significant part of the investment portfolio is invested in fixed income securities. Net investment income is influenced by a number of factors, including the amounts and timing of inward and outward cash flows, the level of interest rates and credit spreads, foreign exchange rates and changes in overall asset allocation. See the segment results under "Investment Activities" below for a discussion of our net investment income for the three months endedMarch 31, 2016.

Operating net income and Operating net income per ordinary share

Operating net income is a non-GAAP financial measure defined as net income (loss) attributable to ordinary shareholders excluding: (1) our net investment income - Life Funds Withheld Assets, as defined in Item 1, Note 1, "Basis of Preparation and Consolidation," to the Unaudited Consolidated Financial Statements included herein, net of tax, (2) our net realized (gains) losses on investments sold - excluding Life Funds Withheld Assets, net of tax, (3) our net realized (gains) losses on investments sold (including OTTI) and net unrealized (gains) losses on investments, Trading - Life Funds Withheld Assets, (4) our net realized and unrealized (gains) losses on derivatives, net of tax, (5) our net realized and unrealized (gains) losses on life retrocession embedded derivative and derivative instruments - Life Funds Withheld Assets, (6) our share of items (2) and (4) for our insurance company affiliates for the periods presented, (7) our foreign exchange (gains) losses, net of tax, and (8) our expenses related to the Catlin acquisition, net of tax.

We evaluate the performance of and manage our business to produce an underwriting profit. In addition to presenting net income (loss), we believe that showing operating net income (loss) enables investors and other users of our financial information to analyze our performance in a manner similar to how we analyze our performance. In this regard, we believe that providing only a GAAP presentation of net income (loss) would make it more difficult for users of our financial information to evaluate our underlying business, particularly given that our GAAP results reflect the returns of the Life Funds Withheld Assets. We also believe that equity analysts and certain rating agencies that follow us (and the insurance industry as a whole) exclude these items from their analyses for the same reasons, and they request that we provide this non-GAAP financial information on a regular basis. A reconciliation of our net income (loss) attributable to ordinary shareholders to operating net income (loss) is provided at "Reconciliation of Non-GAAP Measures" below.

Operating net income per ordinary share is calculated by dividing non-GAAP operating net income by the weighted average number of ordinary shares and ordinary share equivalents outstanding for each period combined with the impact from dilution of share-based compensation and certain conversion features where dilutive.

Annualized return on average ordinary shareholders' equity ("ROE")

ROE is another non-GAAP financial measure that we consider important in evaluating our operating performance and view as a key measure of return generated for ordinary shareholders. ROE is calculated by dividing the net income (loss) attributable to ordinary shareholders for any period by the average of the opening and closing shareholders' equity attributable to XL-Ireland. We establish minimum target ROEs for our total operations, segments and lines of business. If our minimum ROE targets over the longer term are not met with respect to any line of business, we seek to modify and/or exit this line. In

44

addition, among other factors, compensation of our senior officers is dependent on the achievement of our performance goals to enhance ordinary shareholder value as measured by ROE (adjusted for certain items considered to be "non-operating" in nature).

The following table presents our ROE for the three months ended March 31, 2016 and 2015:

	Three Months Ended
	March 31,				Change
	2016		2015		2016 to 2015
ROE	0.7	%	1.4	%	(0.7)pts

Three months ended March 31, 2016 vs. 2015: The decrease in our ROE for the three months ended March 31, 2016 as compared to the same period of 2015 was due to factors discussed in Operating ROE below, partially offset by an increase in net realized gains for the quarter, as well as favorable foreign exchange activity.

Annualized operating return on average ordinary shareholders’ equity ("Operating ROE")

Operating ROE is another non-GAAP financial measure that we consider important in evaluating our operating performance. Operating ROE is derived by dividing non-GAAP operating net income for any period by the average of the opening and closing ordinary shareholders' equity.

The following table presents our Operating ROE for the three months ended March 31, 2016 and 2015:

	Three Months Ended
	March 31,				Change
	2016		2015		2016 to 2015
Operating ROE	3.5	%	7.7	%	(4.2)pts

Three months ended March 31, 2016 vs. 2015: The decrease in our Operating ROE for the three months ended March 31, 2016 was the result of lower operating income as well as the increase in shares issued resulting from the Catlin Acquisition in the second quarter of 2015. Operating income was adversely affected compared to the prior year by a challenging underwriting environment, the inclusion of integration expenses in the current year, and lower returns from financial, investment and other operating affiliates due to volatile market conditions. A detailed discussion of our individual segment operating results is included below under "Income Statement Analysis".

A reconciliation of Net income (loss) attributable to ordinary shareholders to operating net income (loss) is provided under "Reconciliation of Non-GAAP Measures" below.

Annualized operating return on average ordinary shareholders' equity excluding unrealized gains and losses on investments ("Operating ROE ex-UGL")

Operating ROE ex-UGL is an additional measure of our profitability that eliminates the impacts of mark to market fluctuations on our investment portfolio that have not been realized through sales, which we believe provides a consistent measure of our performance. Operating ROE ex-UGL is derived from the non-GAAP operating net income measure by dividing non-GAAP operating net income for any period by the average of the opening and closing ordinary shareholders' equity excluding unrealized gains and losses on investments. A reconciliation of the opening and closing ordinary shareholders' equity to the opening and closing ordinary shareholders' equity excluding unrealized gains and losses on investments is provided under "Reconciliation of Non-GAAP Measures" below.

The following table presents our Operating ROE ex-UGL for the three months ended March 31, 2016 and 2015:

	Three Months Ended
	March 31,				Change
	2016		2015		2016 to 2015
Operating ROE ex-UGL	3.9	%	9.1	%	(5.2)pts

Three months ended2016 vs. 2015: The decrease in our Operating ROE ex-UGL was mainly the result of the drivers discussed above as part of Operating ROE above.

Book value per ordinary share

We view the change in our book value per ordinary share as an additional measure of our performance, representing the value generated for our ordinary shareholders each period, and we believe that this measure (along with the diluted measures

45

described below) is a key driver of our share price over time. Book value per ordinary share, a non-GAAP financial measure, is calculated by dividing ordinary shareholders' equity (total shareholders' equity less non-controlling interest in equity of consolidated subsidiaries) by the number of outstanding ordinary shares at the applicable period end. Book value per ordinary share is affected primarily by net income (loss), by any changes in the net unrealized gains and losses on our investment portfolio, by currency translation adjustments and by the impact of any share buyback or issuance activity. Ordinary shares outstanding include all ordinary shares issued and outstanding (as disclosed on the face of the balance sheets) as well as all director share units outstanding.

The following table presents our book value per ordinary share as of the dates indicated below:

(U.S. dollars)	March 31, 2016		December 31, 2015		Change (Three Months)
Book value per ordinary share	$	40.83	$	39.61	$	1.22

Three months ended March 31, 2016: The increase in our book value per ordinary share was primarily a result of an increase in net unrealized gains during the quarter. Additionally, we experienced a positive impact on book value per ordinary share due to a decrease in the number of ordinary shares outstanding, resulting from share buyback activity during the quarter.

Fully diluted tangible book value per ordinary share

Fully diluted tangible book value per ordinary share is a non-GAAP financial measure and is calculated by dividing ordinary shareholders' equity excluding intangible assets (as disclosed on the face of the balance sheets) by the number of outstanding ordinary shares at the applicable period end combined with the impact from dilution of share-based compensation and certain conversion features where dilutive.

The following table presents our fully diluted tangible book value per ordinary share as of the dates indicated below:

(U.S. dollars)	March 31, 2016		December 31, 2015		Change (Three Months)
Fully diluted tangible book value per ordinary share	$	32.62	$	31.52	$	1.10

Three months ended March 31, 2016: The increase in our fully diluted tangible book value per ordinary share was generally a result of the increase of our book value per ordinary share as discussed above. Share buyback activity does not have the same accretive benefit with respect to tangible book value per ordinary share.

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RECONCILIATION OF NON-GAAP MEASURES

The following is a reconciliation of net income (loss) attributable to ordinary shareholders to operating net income (loss) and also includes the calculation of Operating ROE and Operating ROE ex-UGL for the three months ended March 31, 2016 and 2015:

(U.S. dollars in thousands, except ratios and per share amounts)	Three Months Ended
	March 31,
	2016			2015
Net income (loss) attributable to ordinary shareholders	$	21,885		$	36,281
Net realized and unrealized (gains) losses on life retrocession embedded derivative and derivative instruments - Life Funds Withheld Assets (1)	236,080			229,367
Net realized (gains) losses on investments and net unrealized (gains) losses on investments, Trading - Life Funds Withheld Assets	(101,166		)	(48,289		)
Net investment income - Life Funds Withheld Assets	(41,560		)	(50,419		)
Foreign exchange revaluation (gains) losses on and other income and expense items related to Life Funds Withheld Assets	(10,973		)	(2,386		)
Net income (loss) attributable to ordinary shareholders excluding Contribution from Life Retrocession Arrangements	104,266			164,554
Net realized (gains) losses on investments sold - excluding Life Funds Withheld Assets, net of tax	9,949			(4,518		)
Net realized and unrealized (gains) losses on derivatives, net of tax	3,679			(16,521		)
Net realized and unrealized (gains) losses on investments and derivatives related to the Company's insurance company affiliates, net of tax	413			658
Exchange (gains) losses, net of tax	(14,919		)	24,739
Expenses related to Catlin acquisition, net of tax	—			25,464
Operating net income (loss)	$	103,388		$	194,376
Per ordinary share results:
Net income (loss) attributable to ordinary shareholders	$	0.07		$	0.14
Operating net income (loss)	$	0.35		$	0.75
Weighted average ordinary shares outstanding:
Basic	291,969			255,724
Diluted - Net income	296,666			260,704
Diluted - Operating net income	296,666			260,704
Return on ordinary shareholders' equity:
Closing ordinary shareholders' equity (at period end)	$	11,688,744		$	10,244,057
Unrealized (gain) loss on investments, net of tax	$	(1,171,060	)	$	(1,697,606	)
Average ordinary shareholders' equity for the period excluding unrealized gains and losses on investments	$	10,724,586		$	8,533,067
Average ordinary shareholders' equity for the period	$	11,682,912		$	10,138,904
Operating net income (loss)	$	103,388		$	194,376
Annualized operating net income (loss)	$	413,552		$	777,504
Annualized return on ordinary shareholders' equity - operating net income	3.5		%	7.7		%
Annualized return on ordinary shareholders' equity excluding unrealized gains and losses on investments - operating net income	3.9		%	9.1		%

____________

(1) Investment results for the Life Funds Withheld Assets - including interest income, unrealized gains and losses, and gains and losses from sales - are passed directly to the reinsurer pursuant to a contractual arrangement which is accounted for as a derivative. Changes in the fair value of the embedded derivative associated with the GreyCastle Life Retrocession Arrangements are grouped within "Net realized and unrealized (gains) losses on life retrocession embedded derivative and derivative instruments - Life Funds Withheld Assets" in the reconciliation.

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SIGNIFICANT ITEMS AFFECTING THE RESULTS OF OPERATIONS

Our net income and other financial measures as shown above for the three months endedMarch 31, 2016 have been affected by, among other things, the following significant items:

1)    The current underwriting environment; and

2)    Market movement impacts on our investment portfolio.

1)     The Current Underwriting Environment

There can be no assurance that the following (re)insurance rate conditions or growth opportunities will be sustained or further materialize, or lead to improvements in our books of business. See "Cautionary Note Regarding Forward-Looking Statements."

Insurance

The headwinds that strengthened throughout 2015 have continued, as rates were down 2% for the three months ended March 31, 2016 compared to the prior year quarter. Overall, our Casualty lines were flat and Professional businesses were down 1%. Our Specialty business was down 2%, reflecting continued competitive conditions in the aviation and crisis management lines. Our Energy, Property & Construction ("EPC") businesses were down 5%, led by reductions in the energy book of 9%.

Growth in gross premiums written across the Insurance segment was strong across all of our underwriting divisions, driven largely by the Catlin Acquisition. When we compare the current quarter premiums to the combined books of both legacy organizations in the prior year quarter and normalize for foreign exchange, our actual growth was flat. However, when you consider the portfolio "tuning" activities that started in 2015, where decisions were made to exit certain under-performing books, we saw growth of over 3%.

The trading environment for our core lines of insurance business remains competitive and we continue to focus on those lines of business that we believe provide the best return on capital, including the writing of selective new business, and remain committed to taking the underwriting actions necessary to improve our margins.

Reinsurance

For the three months ended March 31, 2016, we found the underwriting environment to be challenging, but rate decreases continued to decelerate in most classes and regions, down approximately 3% across the Reinsurance segment compared to the prior year period. Despite these rate decreases, compared to the combined books of both legacy organizations in the prior year quarter and excluding the effects of foreign exchange, premiums have increased as a result of new business added.

Our global property catastrophe rates fell roughly 6% and at a lower rate of change than the prior year quarter. On the remainder of the property treaty portfolio, rates were down 3% and ceding commissions on pro rata treaties increased slightly. Our casualty portfolio rates were essentially flat over the prior year quarter.

Despite difficult market conditions, the Reinsurance segment retained profitable business while maintaining underwriting discipline.

2)     Market Movement Impacts on Our Investment Portfolio (Excluding Life Funds Withheld Assets)

During the three months ended March 31, 2016, the positive mark to market change of $397.4 million on our available-for-sale ("AFS") investments was primarily driven by falling interest rates in our major jurisdictions. This represents an approximately 1.1% appreciation in the average fair market value of investments for the three months ended March 31, 2016.

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The following table provides further detail regarding the movements in relevant credit and equity markets, as well as in government interest rates, using selected market indices during the three months ended March 31, 2016:

	Interest Rate Movement for the three months ended March 31, 2016 (1) (‘+’/‘-’ represents increases / decreases in interest rates)	Credit Spread Movement for the three months ended March 31, 2016 (2) (‘+’/‘-’ represents widening / tightening of credit spreads)	Equity Market Price Movement for the three months ended March 31, 2016 (1) (‘+’/‘-’ represents increases / decreases in common equity market benchmarks)
United States	-55 basis points (5 year Treasury)	1 basis points (U.S. Corporate A rated)	-0.3% (Global equity market)
		-2 basis points (U.S. Agency Mortgages)	0.8% (U.S. equity market)
United Kingdom	-50 basis points (5 year Gilt)	14 basis points (U.K. Corporate, AA rated)
Euro-zone	-28 basis points (5 year Bund)	0 basis points (Europe Corporate, A rated)

____________

(1) Source: Bloomberg Finance L.P.

(2) Source: Merrill Lynch Global Indices.

Net realized losses on investments in the three months ended March 31, 2016 totaled $8.4 million, including net realized gains of $11.2 million from sales of fixed maturities offset by net realized losses of approximately $19.6 million related to OTTI charges on certain of the Company’s fixed income investments. For further analysis of this, see "Income Statement Analysis - Investment Activities" below.

OTHER KEY FOCUSES OF MANAGEMENT

We remain focused on, among other things, managing capital, enhancing enterprise risk management capabilities and monitoring regulatory change.  In addition, in connection with the closing of our acquisition of Catlin, we are focused on both successfully integrating our respective businesses, including culture, products, internal controls, procedures and systems, as well as capitalizing on the respective strengths and talents of both organizations.

Catlin Integration

We closed the Catlin Acquisition on May 1, 2015. Management has been highly focused on successfully integrating Catlin and realizing the anticipated synergies associated with this significant acquisition. Following the initial announcement of the proposed Catlin Acquisition, management developed a comprehensive integration plan that identified key areas of focus and action plans in anticipation of closing. Examples of this include the development of proposed operating models and leadership structures, talent management and system and process integration roadmaps for structural and organizational design changes. These efforts were further broken down into multiple work streams led by an integration steering committee and a project management team that includes colleagues from both organizations. Management, the integration steering committee and the project management team have continued to implement this integration plan since the closing of the Catlin Acquisition.

Capital Management

The management of our capital is fundamental to our business model and our ability to underwrite business.

Buybacks of Ordinary Shares

On August 6, 2015, XL-Ireland announced that its Board of Directors approved a new share buyback program, authorizing the purchase of up to $1.0 billion of ordinary shares (the "August 2015 Program").

During the three months endedMarch 31, 2016, the Company purchased and canceled 10.0 million ordinary shares under the August 2015 Program for $355.1 million. As of March 31, 2016, $348.2 million remained available for purchase under the August 2015 Program.

All share buybacks were carried out by way of redemption in accordance with Irish law and our constitutional documents. All shares so redeemed were canceled upon redemption.

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Risk Management

Our risk management and risk appetite framework is detailed in Item 1, "Business - Enterprise Risk Management," included in our Annual Report on Form 10-K for the year ended December 31, 2015. The table below shows our estimated per event net 1% and 0.4% exceedance probability exposures for certain peak natural catastrophe peril regions. These estimates assume that amounts due from reinsurance and retrocession purchases are 100% collectible. There may be credit or other disputes associated with these potential receivables.

			1-in-100 Event				1-in-250 Event
Geographical Zone (U.S. dollars in millions)	Peril	Measurement Date of In-Force Exposures (1)	Probable Maximum Loss (2)		Percentage of Adjusted Tangible Capital at March 31, 2016 (3)		Probable Maximum Loss (2)		Percentage of Adjusted Tangible Capital at March 31, 2016 (3)
North Atlantic	Windstorm	January 1, 2016	$	1,582	13.6	%	$	2,591	22.3	%
North America	Earthquake	January 1, 2016	929		8.0	%	1,759		15.2	%
Europe	Windstorm	January 1, 2016	739		6.4	%	826		7.1	%
Japan	Earthquake	January 1, 2016	601		5.2	%	818		7.1	%
Japan	Windstorm	January 1, 2016	401		3.5	%	530		4.6	%

____________

(1) Detailed analyses of aggregated in-force exposures and maximum loss levels are done periodically. The measurement dates represent the date of the last completed detailed analysis by geographical zone.

(2) Probable maximum losses, which include secondary uncertainty that incorporates variability around the expected probable maximum loss for each event, do not represent our maximum potential exposures and are pre-tax.

(3) Adjusted Tangible Capital is defined as Total Shareholders’ Equity plus (i) outstanding subordinated notes due 2025 and 2045 less (ii) Goodwill and Other Intangible Assets and less (iii) Accumulated Other Comprehensive Income (excluding certain net balances associated with Life Funds Withheld Assets).

Regulatory Change

As part of our operational efficiency, management continues to actively monitor and assess the various regulatory initiatives and legislation that impact us or in the future could impact us. For example, management has been focused on Solvency II, which became effective on January 1, 2016. This E.U. directive covers the supervision, capital adequacy and risk management of, and regulatory reporting for, European-based (re)insurers. See Item 1, "Business - Regulation" for additional discussion of Solvency II. See "Business - Regulation," included in Item 1 of our Annual Report on Form 10-K for the year ended December 31, 2015.

If the proposed redomestication described in Item 1, Note 1, "Basis of Preparation and Consolidation," is completed, our group regulator would change from Ireland to Bermuda, whose regulatory system has been granted Solvency II Equivalence.

CRITICAL ACCOUNTING POLICIES AND ESTIMATES

See the discussion of our Critical Accounting Policies and Estimates in "Management's Discussion and Analysis of Financial Condition and Results of Operations - Critical Accounting Policies and Estimates," included in Item 7 of our Annual Report on Form 10-K for the year ended December 31, 2015.

VARIABLE INTEREST ENTITIES AND OTHER OFF-BALANCE SHEET ARRANGEMENTS

See the discussion of our variable interest entities and other off-balance sheet arrangements in "Management's Discussion and Analysis of Financial Condition and Results of Operations - Variable Interest Entities ("VIEs") and Other Off-Balance Sheet Arrangements," included in our Annual Report on Form 10-K for the year ended December 31, 2015 and Item 1, Note 12, "Variable Interest Entities," to the Unaudited Consolidated Financial Statements included herein.

SEGMENTS

We are organized into two operating segments: Insurance and Reinsurance. The results of our run-off life operations are reported within "Corporate and Other." Our general investment and financing operations are also reflected in "Corporate and Other." Prior period information has been re-presented to reflect the current presentation.

We evaluate the performance of both the Insurance and Reinsurance segments based on underwriting profit. Other items of our revenue and expenditure are not evaluated at the segment level for reporting purposes. In addition, we do not allocate investment assets by segment for our P&C operations. Investment assets related to our run-off life operations and certain structured products included in the Insurance and Reinsurance segments are held in separately identified portfolios. As such, net investment income from these assets is included in the contribution from each of these segments. See Item 1, Note 5,

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"Segment Information," to the Unaudited Consolidated Financial Statements included herein for a reconciliation of segment data to our Unaudited Consolidated Financial Statements.

Segment Results for the three months ended March 31, 2016 compared to the three months ended March 31, 2015

Insurance

Our Insurance operations provide commercial property, casualty and specialty insurance products on a global basis. Products generally provide tailored coverages for complex corporate risks and include the following lines of business: property, casualty, professional liability, environmental liability, aviation and satellite, marine and offshore energy, equine, fine art and specie, surplus lines, political risk and trade credit, crisis management, surety, cybertech, accident and health and other insurance coverages, including those mentioned above, through our programs, middle market and construction businesses. We focus on those lines of business within our Insurance operations that we believe provide the best return on capital over time. As a result of the Catlin Acquisition, Insurance lines of business are now divided into the following underwriting divisions: Professional Lines ("Professional"), which we previously referred to as Global Professional Lines; Casualty, which includes the casualty business previously included under International Property and Casualty, and North America Property and Casualty; Energy, Property & Construction ("EPC"), which includes the property business previously reported under International Property and Casualty, North America Property and Casualty, and Specialty; and Specialty Lines ("Specialty").

The following table summarizes the underwriting profit (loss) for the Insurance segment:

	Three Months Ended						Percentage
	March 31,						Change
(U.S. dollars in thousands)	2016			2015			2016 to 2015
Gross premiums written	$	2,503,972		$	1,654,747		51.3	%
Net premiums written	1,503,934			1,089,108			38.1	%
Net premiums earned	1,593,874			962,306			65.6	%
Net losses and loss expenses	999,592			616,947			62.0	%
Acquisition costs	225,458			80,387			180.5	%
Operating expenses	312,432			208,457			49.9	%
Underwriting profit (loss)	$	56,392		$	56,515		(0.2	)%
Net results – structured products	1,222			2,905			(57.9	)%
Net fee income and other (expense)	(3,862		)	(7,465		)	(48.3	)%

Gross Premiums Written

The following table summarizes our gross premiums written by underwriting division for the Insurance segment:

	Three Months Ended				Percentage
	March 31,				Change
(U.S. dollars in thousands)	2016		2015		2016 to 2015
Professional	$	381,264	$	341,711	11.6	%
Casualty	812,414		674,565		20.4	%
EPC	661,276		366,805		80.3	%
Specialty	649,018		271,666		138.9	%
Total	$	2,503,972	$	1,654,747	51.3	%

Gross premiums written increased by 51.3%, primarily due to the Catlin Acquisition. When evaluated in local currency, our gross premiums written increased by 54.7%. The unfavorable foreign exchange on our gross premiums written was mainly due to the weakening of the Euro against the U.S. dollar, impacting Euro-denominated business. Adjusting for the impact of the Catlin Acquisition and foreign exchange, premiums were generally flat. However, when you consider the portfolio "tuning" activities that started in 2015, where decisions were made to exit certain under-performing books, we saw growth of over 3%.

The following is a summary of the premium movements by underwriting division:

▪ Professional - increase of 11.6% primarily in North America and international financial lines as a result of the Catlin Acquisition. Additionally, we experienced modest growth in cyber and design professional business lines. Compared to the combined books in the prior year, premiums decreased slightly, most notably in the commercial errors and omissions line.

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▪ Casualty - increase of 20.4% is largely as a result of the Catlin Acquisition and related to excess and surplus lines, casualty programs and international casualty. Compared to the combined books in the prior year, premiums decreased slightly due to rate pressures.

▪ EPC - increase of 80.3% with increases across all lines of business, following the Catlin Acquisition. Compared to the combined books in the prior year, and excluding the effects of foreign exchange, premiums increased slightly, generally in core property lines.

▪ Specialty - increases across all lines of business following the Catlin Acquisition. Compared to the combined books in the prior year, premiums decreased slightly due to rate pressures, most notably in marine lines.

Net Premiums Written

The increase of 38.1% largely resulted from the increase in gross premiums written due to the Catlin Acquisition, partially offset by increases in ceded premium written due to a change in our ceded reinsurance strategy whereby we are placing greater emphasis on composite and whole account covers along with early cancellations and re-writes of several treaties.

Net Premiums Earned

The increase of 65.6% is mainly attributable to the increase in net premiums written as noted above, plus the effects of the change in our ceded reinsurance strategy noted above, as contracts written in the first quarter are earned ratably throughout the year.

Net Losses and Loss Expenses

Combined Ratio

The following table presents the ratios for the Insurance segment:

	Three Months Ended				Percentage
	March 31,				Change
	2016		2015		2016 to 2015
Loss and loss expense ratio	62.7	%	64.1	%	(1.4	)
Acquisition expense ratio	14.1	%	8.4	%	5.7
Operating expense ratio	19.7	%	21.6	%	(1.9	)
Underwriting expense ratio	33.8	%	30.0	%	3.8
Combined ratio	96.5	%	94.1	%	2.4

The loss and loss expense ratio includes net losses incurred for both the reported period and any favorable or adverse prior year development of loss and loss expense reserves held at the beginning of the year. The following table summarizes these components of the loss ratio for the Insurance segment for the three months ended March 31, 2016:

	Three Months Ended				Percentage
	March 31,				Change
	2016		2015		2016 to 2015
Loss and loss expense ratio	62.7	%	64.1	%	(1.4	)
Prior year reserve development	0.7	%	0.6	%	0.1
Loss ratio excluding prior year development	63.4	%	64.7	%	(1.3	)

Loss Ratio - excluding prior year development

The 1.3% percentage point decrease in the loss ratio excluding prior year development was primarily as a result of the incorporation of the acquired businesses, the non-renewal of unprofitable business across the combined books, as well as the amortization of fair value adjustments made as a result of the Catlin Acquisition in the three months ended March 31, 2016 as compared to the prior year period, partially offset by the increase in losses related to natural catastrophe events. Losses net of reinsurance recoveries and reinstatement premiums related to natural catastrophe events for the three months ended March 31, 2016 were $20.6 million higher than in the same period in 2015. Excluding favorable prior year development, net natural catastrophe losses and related reinstatement premiums in both quarters, the loss ratio for the three months ended March 31, 2016 compared to the same period of 2015 decreased by 2.0 percentage points to 61.2%.

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Prior Year Development

The following table summarizes the net (favorable) adverse prior year reserve development by underwriting division relating to the Insurance segment for the three months ended March 31, 2016 and 2015:

	Three Months Ended
	March 31,
(U.S. dollars in thousands)	2016			2015
Professional	$	(301	)	$	1,672
Casualty	1,287			(4,501		)
EPC	(2,276		)	(1,008		)
Specialty	(8,917		)	(2,287		)
Other (1)	(1,151		)	127
Total	$	(11,358	)	$	(5,997	)

____________

(1) Other includes programs, excess and surplus, surety, structured indemnity, certain discontinued lines and the amortization of fair value adjustments made as a result of the Catlin Acquisition.

Net favorable prior year development of $11.4 million was mainly attributable to a release of $8.9 million in specialty lines, driven by international travel binder business.

Underwriting Expense Ratio

The increase of 3.8 percentage points was due to increases in the acquisition expense ratio of 5.7 percentage points partially offset by a decrease in the operating expense ratio of 1.9 percentage points, as follows:

▪ Acquisition expense ratio - we experienced a modest increase to gross acquisition costs across the portfolio on new, renewal and acquired business with lower commissions received from the ceded business, largely resulting from a higher mix of facultative and other excess of loss protections carrying lower ceding commissions than quota share cessions.

▪ Operating expense ratio - decreased 1.9 percentage points due to synergies realized from the Catlin Acquisition.

Net Results - Structured Products

Net results from structured insurance products decreased 57.9% to $1.2 million from the prior year result of $2.9 million. The results include net investment income of $6.0 million and $7.6 million for the three months ended March 31, 2016 and 2015, respectively, and net interest expense of $4.7 million and $4.7 million, for the three months ended March 31, 2016 and 2015, respectively. The decrease in the net results was mainly due to a reduction in investment income as a result of a declining investment yield.

For further information about our structured indemnity contracts that are accounted for as deposit contracts, see Item 8, Note 12, "Deposit Liabilities," to the Consolidated Financial Statements included in our Annual Report on Form 10-K for the year ended December 31, 2015.

Net Fee Income and Other

The decrease compared to the same period of 2015 in net fee income and other expenses was driven by discontinued lines in the Specialty division.

Reinsurance

The Reinsurance segment provides casualty, property risk, property catastrophe, marine, aviation, credit and other specialty reinsurance on a global basis, with business being written on both a proportional and non-proportional treaty basis and also on a facultative basis. Following the Catlin Acquisition, our reinsurance operations are structured into five geographical regions: Bermuda; North America; London; Europe, Middle East & Africa ("EMEA"); and Latin America, Asia Pacific & Credit ("LAC"). Prior to the Catlin Acquisition, London, EMEA and LAC were reported together as International.

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The following table summarizes the underwriting profit (loss) for the Reinsurance segment:

	Three Months Ended				Percentage
	March 31,				Change
(U.S. dollars in thousands)	2016		2015		2016 to 2015
Gross premiums written	$	1,855,343	$	825,662	124.7	%
Net premiums written	1,557,661		747,635		108.3	%
Net premiums earned	757,572		357,188		112.1	%
Net losses and loss expenses	382,893		152,880		150.5	%
Acquisition costs	176,348		71,492		146.7	%
Operating expenses	79,234		42,495		86.5	%
Underwriting profit (loss)	$	119,097	$	90,321	31.9	%
Net results – structured products	748		2,120		(64.7	)%
Net fee income and other	837		825		1.5	%

Gross Premiums Written

The following table summarizes our gross premiums written by region for the Reinsurance segment:

	Three Months Ended				Percentage
	March 31,				Change
(U.S. dollars in thousands)	2016		2015		2016 to 2015
Bermuda	$	393,035	$	265,711	47.9	%
North America	289,343		171,338		68.9	%
London	309,189		66,905		362.1	%
EMEA	536,690		240,723		122.9	%
LAC	327,086		80,985		303.9	%
Total	$	1,855,343	$	825,662	124.7	%

Gross premiums written increased by 124.7%, primarily driven by the Catlin Acquisition. Compared to the combined books in the prior year and excluding the effects of foreign exchange, premiums increased due to positive new business. The following is a summary of the premium movements by region:

▪ Bermuda - increase of 47.9% primarily in the Property Catastrophe line of business. Partially offsetting this growth was due to the alignment of the accounting policy of the acquired business for multiyear contracts with the legacy business, particularly relating to the Property Catastrophe and Casualty lines of business.

▪ North America - increase of 68.9% is largely related to Property Treaty and Casualty lines of business. This is partially offset by canceled Property Treaty business due to higher client retention of exposures.

▪ London - increase relates to the Property Catastrophe and Casualty lines of business. Partially offsetting this growth was aligning the legacy Catlin accounting policy for multiyear contracts, particularly impacting the Property Catastrophe line of business.

▪ EMEA - increase is primarily related to Property Treaty and Casualty businesses. This is partially offset by cancellations in Property Treaty due to the competitive pricing environment.

▪ LAC - increase is primarily related to growth in Crop and Credit lines of business.

When evaluated in local currency, our gross premiums written increased by 127.8%. The unfavorable foreign exchange on our gross premiums written was mainly due to the weakening of the Euro against the U.S. dollar, impacting European business written in this currency.

Net Premiums Written

The significant increase resulted from the gross written premium increases noted above.

Net Premiums Earned

The significant increase is mainly attributable to the increase in gross premiums written noted above.

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Net Losses and Loss Expenses

Combined Ratio

The following table presents the ratios for the Reinsurance segment:

	Three Months Ended				Percentage
	March 31,				Change
	2016		2015		2016 to 2015
Loss and loss expense ratio	50.5	%	42.8	%	7.7
Acquisition expense ratio	23.3	%	20.0	%	3.3
Operating expense ratio	10.5	%	11.9	%	(1.4	)
Underwriting expense ratio	33.8	%	31.9	%	1.9
Combined ratio	84.3	%	74.7	%	9.6

The loss and loss expense ratio includes net losses incurred for both the reported period and any favorable or adverse prior year development of loss and loss expense reserves held at the beginning of the year. The following table summarizes these components of the loss ratio for the Reinsurance segment for the three months ended March 31, 2016 and 2015:

	Three Months Ended				Percentage
	March 31,				Change
	2016		2015		2016 to 2015
Loss and loss expense ratio	50.5	%	42.8	%	7.7
Prior year reserve development	4.3	%	11.9	%	(7.6	)
Loss ratio excluding prior year development	54.8	%	54.7	%	0.1

Loss Ratio - excluding prior year development

The 0.1 percentage point increase in the three months ended March 31, 2016 was mainly the result of natural catastrophe events, net of recoveries and reinstatement premium, being $17.5 million or 2.5 percentage points higher for the three months ended March 31, 2016 than in the same period in 2015. This increase is offset by a 2.4 percentage point improvement on attritional losses for the same periods.

Prior Year Development

The following table summarizes the net (favorable) adverse prior year reserve development by line of business relating to the Reinsurance segment for the three months ended March 31, 2016 and 2015:

	Three Months Ended
	March 31,
(U.S. dollars in thousands)	2016			2015
Property and other short-tail lines	$	(28,692	)	$	(42,293	)
Casualty and other long-tail lines	(3,362		)	(198		)
Total	$	(32,054	)	$	(42,491	)

Net favorable prior year reserve development of $32.1 million for the three months ended March 31, 2016 was mainly attributable to the following:

▪ Net favorable prior year development for the short-tail lines totaled $28.7 million. Details of the significant components are as follows:

▪ For property catastrophe lines, net prior year development was $17.9 million favorable mainly due to better than expected development on attritional losses across the whole book.

▪ For property other lines, net prior year development was $7.8 million favorable mainly due to better than expected development on attritional losses on the property business being partially offset by worse than expected development on attritional losses on the crop business for the 2015 year of account.

▪ For specialty lines, net prior year development was $2.9 million favorable due to better than expected development on attritional losses mainly on the Marine book.

▪ Net favorable prior year development for the long-tail lines totaled $3.4 million. Details of the significant components are as follows:

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▪ For casualty lines, net prior year development was $1.3 million favorable due to better than expected development on attritional losses.

▪ For other lines, net prior year development was $2.1 million favorable mainly due to better than expected development on attritional losses in the credit & surety business.

Underwriting Expense Ratio

The increase of 1.9 percentage points was due to an increase in the acquisition expense ratio of 3.3 percentage points, partially offset by a decrease in the operating expense ratio of 1.4 percentage points.

• The acquisition expense ratio increase was due to the amortization of fair value adjustments recognized as a result of the Catlin Acquisition. Additionally, this acquired business carried a different business mix with a higher average commission.

• The operating expense ratio decrease was mainly attributable to synergies realized from the Catlin Acquisition.

Net Results - Structured Products

Net results from structured reinsurance products decreased 64.7% to $0.7 million from the prior year period net results of $2.1 million. The results include net investment income of $6.7 million and $7.5 million for the three months ended March 31, 2016 and 2015, respectively, interest expense of $6.0 million and $5.3 million, and operating expenses of nil and $0.1 million, for the three months ended March 31, 2016 and 2015, respectively. The decrease in the net results was from higher interest expense recorded in the prior year quarter, which was a result of accretion rate adjustments on certain structured indemnity contracts. Also, contributing to the decrease in net results is the reduction in net investment income due to a declining investment yield.

For further information about our structured indemnity contracts that are accounted for as deposit contracts, see Item 8, Note 12, "Deposit Liabilities," to the Consolidated Financial Statements included in our Annual Report on Form 10-K for the year ended December 31, 2015.

Corporate and Other (including run-off Life Operations)

Our general investment and financing operations are reflected in Corporate and Other. In addition, results of our Run-Off Life Operations are reported within "Corporate and Other." We ceased writing new life reinsurance contracts in 2009 and, since that time, have been managing the run-off of our life reinsurance operations.

Run-Off Life Operations

As noted in Item 1, Note 1, "Basis of Preparation and Consolidation," in May 2014, we ceded the majority of our life reinsurance business to GreyCastle Life Reinsurance ("GCLR") via 100% quota share reinsurance (the "GreyCastle Life Retro Arrangements"). In December 2015, we ceded the vast majority of our remaining life reinsurance reserves, consisting mainly of U.S. Term business (the "U.S. Term Life Retro Arrangements").

Impact of GreyCastle Life Retro Arrangements

As noted in Item 1, Note 7(c)(ii), "Derivative Instruments - Other Non-Investment Derivatives - Credit Exposure," to the Unaudited Consolidated Financial Statements included herein, although our net income (loss) is subject to variability related to the GreyCastle Life Retro Arrangements, there is minimal impact on our comprehensive income in any period.

Run-Off Life Operations - not subject to GreyCastle Life Retro Arrangements

During the three months ended March 31, 2016, our net income from our Run-Off Life Operations which were not subject to the GreyCastle Life Retro Arrangements was $4.5 million. Included within this positive result are net realized gains of $2.7 million. Additionally, the net investment result of $8.6 million is partially offset by a net underwriting loss of $3.4 million and interest expense of $3.4 million on the funds withheld for the U.S. Term Life Retro Arrangements.

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Investment Performance (Excluding Life Funds Withheld Assets)

We manage our investment portfolio in accordance with investment guidelines approved by the Risk and Finance Committee of the Board of Directors of XL-Ireland. The following is a summary of the investment portfolio returns, which are calculated by dividing the sum of gross investment income, net income from investment affiliates, realized gains (losses) and unrealized gains (losses) by the average market value of each portfolio, for the three months ended March 31, 2016 and 2015:

	Three Months Ended
	March 31,
	2016		2015
Total Return on Investments (1)	1.7	%	1.4	%
Other Portfolios (2)
Hedge fund portfolio (3)	(1.0	)%	2.6	%
Equity portfolio	0.5	%	2.0	%

___________

(1) The performance of investment portfolios is measured on a local currency basis. For the aggregate performance calculation, respective local currency balances are translated to U.S. dollars using quarter end rates to calculate composite portfolio results.

(2) Performance on Other Portfolios is included in the Total Return on Investments.

(3) Performance on the hedge fund portfolio reflects the three months ended February 29, 2016 and February 28, 2015, respectively, for both equity and non-equity hedge funds.

Investment Activities (Excluding Life Funds Withheld Assets)

The following table illustrates net investment income, net income from investment fund affiliates, net realized (losses) gains on investments and net realized and unrealized gains (losses) on derivative instruments for the three months ended March 31, 2016 and 2015:

	Three Months Ended					Percentage
	March 31,					Change
(U.S. dollars in thousands)	2016			2015		2016 to 2015
Net investment income - excluding Life Funds Withheld Assets	$	164,326		$	158,094	3.9	%
Net income (loss) from investment fund affiliates	(4,579		)	35,329		N/M
Net realized gains (losses) on investments	(8,416		)	4,602		N/M
Net realized and unrealized gains (losses) on derivative instruments (1)	(3,622		)	16,521		N/M

____________

(1) For a summary of realized and unrealized losses on all derivative instruments, see Item 1, Note 7, "Derivative Instruments," to the Unaudited Consolidated Financial Statements included herein.

* N/M - Not Meaningful

Net Investment Income

The increase of 3.9% was primarily due to the addition of assets to our portfolio as a result of the Catlin Acquisition, partially offset by a reduction in investments yield as a result of lower reinvestment rates and cash outflows from the investment portfolio.

We estimate that approximately $3.6 billion of assets with an average gross book yield of 2.4% will mature and pay down over the next 12 months compared to the average new money rate in the three months ended March 31, 2016 on our portfolio of 1.7%.

Net Income (Loss) from Investment Fund Affiliates

Net income from investment fund affiliates includes earnings from our investments in closed-end investment funds and partnerships and similar vehicles that are accounted for under the equity method.

Performance for the three months ended March 31, 2016 was a loss and lagged significantly behind very strong results from the same period of 2015. Hedge fund returns were weak in the first quarter, as poor equity and credit market returns and elevated volatility during the period challenged hedge fund affiliate results. In particular, funds pursuing market directional strategies, including equity long/short and macro, contributed to the losses for the quarter. The Company's private equity and private credit funds produced solid performance for the quarter, generally in line with the prior year quarter's results.

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Net Realized Gains and Losses on Investments

Net realized losses on investments of $8.4 million in the three months ended March 31, 2016 included net realized gains of $11.2 million, which resulted primarily from sales of U.S. Government and Government Related fixed maturities and equities, partially offset by losses in corporate securities and Non-U.S. Sovereign securities. These amounts were offset by realized losses of approximately $19.6 million related to the OTTI charges on certain of our fixed income and equity investments. For further discussion, see Item 1, Note 6, "Investments," to the Unaudited Consolidated Financial Statements included herein.

Net realized gains on investments of $4.6 million in the three months ended March 31, 2015 included realized losses of $10.6 million related to the write-down of certain of our structured securities and medium term notes and currency losses with respect to which we determined that there was an other-than-temporary decline in the value of those investments, as well as net realized gains of $15.2 million.

Net Realized and Unrealized Gains and Losses on Derivative Instruments

Net realized and unrealized losses on derivatives of $3.6 million for the three months ended March 31, 2016 resulted from our investment strategy to manage interest rate risk, foreign exchange risk and credit risk, and to replicate permitted investments. For further information, see Item 1, Note 7, "Derivative Instruments," to the Unaudited Consolidated Financial Statements included herein.

Other Revenues and Expenses

The following table sets forth our other revenues and expenses for the three months ended March 31, 2016 and 2015:

	Three Months Ended						Percentage
	March 31,						Change
(U.S. dollars in thousands)	2016			2015			2016 to 2015
Net income (loss) from operating affiliates	$	12,650		$	22,668		(44.2	)%
Exchange (gains) losses	(33,819		)	27,390			N/M
Corporate operating expenses	112,510			62,443			80.2	%
Net realized and unrealized gains (losses) on life retrocession embedded derivative and derivative instruments - Life Funds Withheld Assets	(236,080		)	(229,367		)	2.9	%
Interest expense (1)	41,613			41,481			0.3	%
Income tax expense	22,295			24,218			(7.9	)%

____________

(1) Interest expense includes costs related to our debt and collateral facilities and does not include deposit liability accretion, which is included in Net investment results - structured products.

* N/M - Not Meaningful

Net Income (Loss) from Operating Affiliates

The following table sets forth the net income (loss) from operating affiliates for the three months ended March 31, 2016 and 2015:

	Three Months Ended				Percentage
	March 31,				Change
(U.S. dollars in thousands)	2016		2015		2016 to 2015
Net income (loss) from investment manager affiliates	$	12,529	$	3,739	N/M
Net income (loss) from strategic and other operating affiliates	121		18,929		(99.4	)%
Net income (loss) from operating affiliates	$	12,650	$	22,668	(44.2	)%

____________

* N/M - Not Meaningful

Net Income from Investment Manager Affiliates

The results for the three months ended March 31, 2016 reflect a significant increase in the amount of incentive fees generated by several investment manager affiliates relative to the prior year period, where incentive fees for the managers that charge them were modest.

Net Income from Strategic and Other Operating Affiliates

The decrease of 99.4% was largely due to the sale of our interest of ARX, which was an insurance affiliate that writes direct U.S. homeowners insurance, as noted in Item 1, Note 3(d), "Acquisitions and Disposals - Sale of Strategic Operating Affiliate."

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Exchange Gains and Losses

The foreign exchange gains of $33.8 million in the three months ended March 31, 2016 were principally a result of the impact of the strengthening of the U.S. dollar against our U.K. sterling-denominated net monetary liabilities held in U.S. dollar functional currency designated business units, which was partially offset by losses created by the effect of a weakening of the U.S. dollar against the Canadian dollar and the Brazilian real on net monetary liabilities. In the three months ended March 31, 2015, foreign exchange net losses of $27.4 million were principally a result of an overall strengthening of the U.S. dollar against our Euro and Singapore dollar denominated net monetary assets, arising from our operating assets in business units with functional currencies designated in a range of currencies, partially offset by the effect of a strengthening of the U.S. dollar against our U.K. sterling-denominated net monetary liabilities.

Corporate Operating Expenses

The significant increase was primarily due to integration and operational costs associated with the Catlin Acquisition as noted in Item 1, Note 3(c), "Acquisitions and Disposals - Catlin Acquisition."

Net Realized and Unrealized Gains and Losses on Life Retrocession Embedded Derivative and Derivative Instruments - Life Funds Withheld Assets

The Company has entered into GreyCastle Life Retro Arrangements, as described in Note 1, "Basis of Preparation and Consolidation," to the Unaudited Consolidated Financial Statements included herein. The embedded derivative is recorded at fair value with changes in fair value recognized in earnings through "Net realized and unrealized gains (losses) on life retrocession embedded derivative and derivative instruments - Life Funds Withheld Assets." For a further discussion, see Item 1, Note 7, "Derivative Instruments," to the Unaudited Consolidated Financial Statements included herein.

Interest Expense

The increase of 0.3% was a result of the overall increase in our debt due to the issuance of subordinated notes in March 2015, as outlined in Item 8, Note 14, "Notes Payable and Debt and Financing Arrangements," to the Consolidated Financial Statements included in our Annual Report on Form 10-K for the year ended December 31, 2015 and Item 1, Note 10, "Notes Payable and Debt and Financing Arrangements," to the Unaudited Consolidated Financial Statements included herein.

Income Tax Expense

Tax charges of $22.3 million and $24.2 million were incurred in the three months ended March 31, 2016 and 2015, respectively. The tax charges recognized in these periods reflect the combination of our expected full year effective tax rate applied to pre-tax operating net income in the respective periods, the tax calculated on items excluded from operating net income, and discrete tax adjustments which are not part of the effective tax rate. The tax on items excluded from operating net income is calculated at the applicable jurisdictional tax rate.

BALANCE SHEET ANALYSIS

Investments (Excluding Life Funds Withheld Assets)

The primary objective of our investment strategy is to maximize the risk adjusted return on capital employed subject to a variety of constraints including: maintaining adequate regulatory capitalization; maintaining sufficient liquidity to ensure payment of claims, operating expenses and other obligations even during stressed scenarios; and generating stable net investment income.

As described in Item 1, Note 1, "Basis of Preparation and Consolidation," to the Unaudited Consolidated Financial Statements included herein, in connection with the GreyCastle Life Retro Arrangements, the Life Funds Withheld Assets are managed pursuant to agreed upon investment guidelines that meet the contractual commitments of the XL ceding companies and applicable laws and regulations. All of the investment results associated with the Life Funds Withheld Assets ultimately accrue to GCLR. Because we no longer share the risks and rewards of the underlying performance of the supporting invested assets, the disclosures in this section exclude the Life Funds Withheld Assets.

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As of March 31, 2016 and December 31, 2015, total investments and cash and cash equivalents, including accrued investment income and net receivable/(payable) for investments sold/(purchased) but excluding Life Funds Withheld Assets, were approximately $37.4 billion and $37.4 billion, respectively. The following table summarizes the composition of our invested assets, excluding Life Funds Withheld Assets, as of March 31, 2016 and December 31, 2015:

	March 31, 2016					December 31, 2015
(U.S. dollars in thousands)	Carrying Value			Percent of Total		Carrying Value		Percent of Total
Cash and cash equivalents	$	2,820,897		7.5	%	$	3,256,236	8.7	%
Restricted cash	57,920			0.2	%	41,860		0.1	%
Net receivable/ (payable) for investments sold/ (purchased)	(10,914		)	—	%	101,098		0.3	%
Accrued investment income	228,686			0.6	%	243,409		0.7	%
Short-term investments	317,304			0.8	%	617,390		1.7	%
Fixed maturities - AFS (1):
U.S. Government and Government-Related/Supported	4,576,987			12.2	%	5,065,637		13.5	%
Corporate - Financials	3,704,315			9.9	%	3,561,909		9.5	%
Corporate - Non Financials	7,091,510			19.0	%	6,900,447		18.5	%
RMBS – Agency	4,367,007			11.7	%	3,757,971		10.1	%
RMBS – Non-Agency	302,843			0.8	%	328,540		0.9	%
CMBS	325,485			0.9	%	405,316		1.1	%
CDOs	21,729			0.1	%	32,410		0.1	%
Other asset-backed securities	1,162,898			3.1	%	1,168,572		3.1	%
U.S. States and political subdivisions of the States	2,584,747			6.9	%	2,632,070		7.0	%
Non-U.S. Sovereign Government, Provincial, Supranational and Government-Related/Supported	5,546,695			14.8	%	5,251,614		14.0	%
Total fixed maturities - AFS	$	29,684,216		79.4	%	$	29,104,486	77.8	%
Equity securities	878,407			2.3	%	878,919		2.4	%
Investments in affiliates	1,953,711			5.2	%	1,708,899		4.6	%
Other investments	1,453,890			4.0	%	1,433,057		3.7	%
Total investments and cash and cash equivalents - excluding Life Funds Withheld Assets	$	37,384,117		100.0	%	$	37,385,354	100.0	%

____________

(1) Carrying value represents the fair value of AFS fixed maturities.

We review our corporate debt investments on a regular basis to consider their concentration, credit quality and compliance with established guidelines. As of March 31, 2016 and December 31, 2015, the average credit quality of our total fixed income portfolio was "AA". Included in the table below are the credit ratings of the fixed income portfolio excluding operating cash as of March 31, 2016 and December 31, 2015:

	March 31, 2016				December 31, 2015
Investments by Credit Rating (1) (U.S. dollars in millions)	Carrying Value		Percent of Total		Carrying Value		Percent of Total
AAA	$	13,970	44.3	%	$	14,242	45.1	%
AA	7,153		22.7	%	7,005		22.3	%
A	7,487		23.8	%	7,316		23.2	%
BBB	2,228		7.1	%	2,343		7.4	%
BB and below	598		1.9	%	577		1.8	%
Not rated	85		0.2	%	65		0.2	%
Total	$	31,521	100.0	%	$	31,548	100.0	%

____________

(1) The credit rating for each asset reflected above was principally determined based on the weighted average rating of the individual securities from Standard & Poor's, Moody's Investors Service and Fitch Ratings (when available). U.S. Agency debt and related mortgage-backed securities, whether with implicit or explicit government support, reflect the credit quality rating of the U.S. government for the purpose of these calculations.

Gross and Net Unrealized Gains and Losses on Investments (Excluding Life Funds Withheld Assets)

We had gross unrealized losses totaling $239.7 million on 1,934 securities out of a total of 8,763 held as of March 31, 2016 in our AFS portfolio (excluding Life Funds Withheld Assets) that we consider to be temporarily impaired. Individual security positions comprising this balance have been evaluated by management, in conjunction with our investment managers, to determine the severity of these impairments and whether they should be considered other-than-temporary.

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Gross unrealized losses can be attributed to the following significant drivers:

• gross unrealized losses of $68.0 million related to Government and Government Related holdings. Securities in a gross unrealized loss position had a fair value of $2.0 billion as of March 31, 2016.

• gross unrealized losses of $82.0 million related to the Corporate holdings. Securities in a gross unrealized loss position had a fair value of $1.9 billion as of March 31, 2016.

• gross unrealized losses of $20.8 million related to Non-Agency RMBS securities (which consists of our holdings of sub-prime Non-Agency RMBS, second liens, asset backed securities collateralized debt obligations ("ABS CDOs") with sub-prime collateral, Alt-A and Prime RMBS). Securities in an unrealized loss position had a fair value of $211.8 million as of March 31, 2016.

The following table details the security type and length of time that AFS securities were in a continual gross unrealized loss position as of March 31, 2016:

(U.S. dollars in thousands)	March 31, 2016
Security Type and Length of Time in a Continual Unrealized Loss Position (1)	Amount of Unrealized Loss			Fair Value of Securities in an Unrealized Loss Position
Fixed Maturities and Short-Term Investments
Less than 6 months	$	(49,123	)	$	1,971,071
At least 6 months but less than 12 months	(32,389		)	1,584,723
At least 12 months but less than 2 years	(65,885		)	850,454
2 years and over	(45,641		)	690,429
Total	$	(193,038	)	$	5,096,677
Equities
Less than 6 months	$	(8,110	)	$	98,040
At least 6 months but less than 12 months	(38,543		)	267,328
Total	$	(46,653	)	365,368

The following is the maturity profile of the AFS fixed income securities that were in a continual gross unrealized loss position as of March 31, 2016:

	March 31, 2016
(U.S. dollars in thousands)	Amount of Unrealized Loss			Fair Value of Securities in an Unrealized Loss Position
Maturity profile in years of AFS fixed income securities in a gross unrealized loss position
Less than 1 year remaining	$	(29,038	)	$	754,696
At least 1 year but less than 5 years remaining	(68,273		)	2,033,794
At least 5 years but less than 10 years remaining	(33,169		)	870,345
At least 10 years but less than 20 years remaining	(10,220		)	108,588
At least 20 years or more remaining	(8,653		)	186,920
RMBS - Agency	(5,091		)	478,792
RMBS - Non-Agency	(20,847		)	211,811
CMBS	(2,725		)	86,971
CDOs	(4,118		)	21,727
Other asset-backed securities	(10,904		)	343,033
Total	$	(193,038	)	$	5,096,677

European Sovereign Debt Crisis (Excluding Life Funds Withheld Assets)

As developed markets emerged from the global recession, several key nations within the European Union (the "E.U.") - particularly Greece, Italy, Ireland, Portugal and Spain (the "European Periphery Nations") - have carried particularly high levels of debt and have been slower to return to positive economic growth due to austerity measures implemented to lower such countries' debt levels, and a general lack of competitiveness. The European Central Bank has taken various measures and has asserted its willingness to take any measures deemed necessary to protect these sovereigns' ability to continue to fund their debt. As a result, we believe market risks associated with the European Sovereign Debt crisis have been reduced.

61

Our exposure to this European sovereign debt crisis is from direct investment in fixed maturity securities issued by national and local governments of the European Periphery Nations, as well as from fixed maturity securities issued by certain financial and non-financial corporate entities operating within the European Periphery Nations that currently have a fair value of $64.5 million as of March 31, 2016. We continue to monitor our financial exposure to this crisis, and continually assess the impact of a potential default by any of the European Periphery Nations on their respective debt issuances, including the associated impact on non-sovereign entities in these five nations in the event of such a default.

We currently have no unfunded investment exposures or commitments to either sovereign or non-sovereign entities within the European Periphery Nations. We do invest in various hedge funds, private investment funds and medium term notes that from time to time may invest in securities or investments related to the European Periphery Nations. In general, such funds and medium term notes will invest in debt and/or equity securities of individual corporate issuers, securitized debt instruments and/or fixed maturity instruments issued by national governments of the European Periphery Nations. As market volatility in the European Periphery Nations has declined, we have observed that our hedge fund and private fund managers have increased their exposure to these countries. We estimate that, as of March 31, 2016, our aggregate exposure to European Periphery Nations via our fund investments and medium term notes did not exceed $200 million on a net basis. The exposure was diversified across issuers and instruments and across the five European Periphery Nations.

In addition to the direct investment portfolio considerations discussed above, as an international (re)insurance company, European credit exposures may exist for us within unpaid losses and loss expenses recoverable and reinsurance balances receivable. For further details on these balances, including the names of our most significant reinsurance counterparties, see Item 8, Note 10, "Reinsurance," to the Consolidated Financial Statements included in our Annual Report on Form 10-K for the year ended December 31, 2015. Other sources of potential exposure to European credit issues may exist within certain lines of insurance or reinsurance business written (including, but not limited to, lines such as surety, business interruption, and political risk), or within underlying investments held in securitized financial instruments or in structured transactions in which we have an interest. We consider these potential exposures as part of our ongoing enterprise risk management processes.

Fair Value Measurements of Assets and Liabilities

As described in Item 1, Note 4, "Fair Value Measurements," to the Unaudited Consolidated Financial Statements included herein, we have provided required disclosures by level within the fair value hierarchy of the Company’s assets and liabilities that are carried at fair value, including valuation methodologies.

Level 3 Assets and Liabilities (Excluding Life Funds Withheld Assets)

See Item 1, Note 4, "Fair Value Measurements," of the Unaudited Consolidated Financial Statements included herein, for a description of the valuation methodology utilized to value Level 3 assets and liabilities, how the valuation methodology is validated, an analysis of the change in fair value of Level 3 assets and liabilities, as well as further details associated with various assets classified as Level 3. As of March 31, 2016, we did not have any liabilities that were carried at fair value based on Level 3 inputs other than derivative instruments in a liability position as of March 31, 2016.

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As of March 31, 2016, the fair value of total assets and liabilities carried at fair value, the fair value of Level 3 assets and liabilities and the percentage of Level 3 assets to our total assets and liabilities that are carried at fair value were as follows:

(U.S. dollars in thousands)	Total Assets and Liabilities Carried at Fair Value at March 31, 2016		Fair Value of Level 3 Assets and Liabilities		Level 3 Assets and Liabilities as a Percentage of Total Assets and Liabilities Carried at Fair Value, by Class
Assets
Fixed maturities, at fair value
U.S. Government and Government Agency-Related/Supported	$	4,576,987	$	44,940	1.0	%
Corporate - Financials	3,704,315		43,583		1.2	%
Corporate - Non-Financials	7,091,510		181		—	%
RMBS – Agency	4,367,007		2,853		0.1	%
RMBS – Non-Agency	302,843		—		—	%
CMBS	325,485		—		—	%
CDOs	21,729		21,729		100.0	%
Other asset-backed securities	1,162,898		4,200		0.4	%
U.S. States and political subdivisions of the States	2,584,747		—		—	%
Non-U.S. Sovereign Government, Supranational and Government-Related	5,546,695		—		—	%
Total Fixed maturities, at fair value	$	29,684,216	$	117,486	0.4	%
Equity securities, at fair value	878,407				—	%
Short-term investments, at fair value	317,304		—		—	%
Total investments available for sale	$	30,879,927	$	117,486	0.4	%
Cash equivalents (1)	1,177,119		—		—	%
Other investments (2)	1,312,431		301,095		22.9	%
Other assets (3)	38,734		20,486		52.9	%
Total assets carried at fair value	$	33,408,211	$	439,067	1.3	%
Liabilities
Financial instruments sold, but not yet purchased (4)	$	2,180	$	—	—	%
Other liabilities (5)	50,818		30,338		59.7	%
Total liabilities carried at fair value	$	52,998	$	30,338	57.2	%

____________

(1) Cash equivalents balances subject to fair value measurements include certificates of deposit and money market funds.

(2) The Other investments balances exclude certain structured transactions including certain investments in project finance transactions and a payment obligation (for further information, see Item 8, Note 8, "Other Investments," to the Consolidated Financial Statements included in our Annual Report on Form 10-K for the year ended December 31, 2015) are carried at amortized cost, which totaled $141.5 million at March 31, 2016.

(3) Other assets include derivative instruments, reported on a gross basis.

(4) Financial instruments sold, but not yet purchased, are included within "Payable for investments purchased" on the balance sheets.

(5) Other liabilities include derivative instruments, reported on a gross basis.

Unpaid Losses and Loss Expenses

We establish reserves to provide for estimated claims, the general expenses of administering the claims adjustment process and losses incurred but not reported. These reserves are calculated using actuarial and other reserving techniques to project the estimated ultimate net liability for losses and loss expenses. Our reserving practices and the establishment of any particular reserve reflect our judgment concerning sound financial practice and do not represent any admission of liability with respect to any claims made against us.

Gross unpaid losses and loss expenses totaled $25.9 billion and $25.4 billion as of March 31, 2016 and December 31, 2015, respectively. The table below represents a reconciliation of our P&C unpaid losses and loss expenses for the three months ended March 31, 2016:

63

(U.S. dollars in thousands)	Gross unpaid losses and loss expenses			Unpaid losses and loss expenses recoverable			Net unpaid losses and loss expenses
Balance at December 31, 2015	$	25,439,744		$	(5,248,905	)	$	20,190,839
Losses and loss expenses incurred	1,850,727			(468,242		)	1,382,485
Losses and loss expenses (paid) / recovered	(1,574,236		)	402,499			(1,171,737		)
Loss reserves acquired	140,805			(40,285		)	100,520
Foreign exchange and other	56,444			(23,382		)	33,062
Balance at March 31, 2016	$	25,913,484		$	(5,378,315	)	$	20,535,169

While we regularly review the adequacy of established reserves for unpaid losses and loss expenses, no assurance can be given that actual claims made and payments related thereto will not be in excess of the amounts reserved. In the future, if such reserves develop adversely, such deficiency would have a negative impact on future results of operations. For further discussion, see "Management's Discussion and Analysis of Financial Condition and Results of Operations - Critical Accounting Policies and Estimates - 1) Unpaid Loss and Loss Expenses and Unpaid Loss and Loss Expenses Recoverable," and Note 11, "Losses and Loss Expenses," to the Consolidated Financial Statements included in Items 7 and 8, respectively, in our Annual Report on Form 10-K for the year ended December 31, 2015.

Unpaid Losses and Loss Expenses Recoverable and Reinsurance Balances Receivable

In the normal course of business, we seek to reduce the potential amount of loss arising from claims events by reinsuring certain levels of risk assumed in various areas of exposure with other insurers or reinsurers. While reinsurance agreements are designed to limit our losses from large exposures and permit recovery of a portion of direct unpaid losses, reinsurance does not relieve our ultimate liability to the insureds. Accordingly, the losses and loss expense reserves on the balance sheets represent our total unpaid gross losses. Unpaid losses and loss expense recoverable relates to estimated reinsurance recoveries on the unpaid loss and loss expense reserves.

The table below presents our net paid and unpaid losses and loss expenses recoverable and reinsurance balances receivable:

(U.S. dollars in thousands)	March 31, 2016			December 31, 2015
Reinsurance balances receivable	$	490,755		$	439,934
Reinsurance recoverable on future policy benefits (excluding balances related to the GreyCastle Life Retro Arrangements)	12,749			13,801
Reinsurance recoverable on unpaid losses and loss expenses	5,422,052			5,309,782
Bad debt reserve on unpaid losses and loss expenses recoverable and reinsurance balances receivable	(81,943		)	(82,145		)
Net paid and unpaid losses and loss expenses recoverable and reinsurance balances receivable	$	5,843,613		$	5,681,372

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LIQUIDITY AND CAPITAL RESOURCES

Liquidity is a measure of our ability to generate sufficient cash flows to meet the short- and long-term cash requirements of our business operations. As a global insurance and reinsurance company, one of our principal responsibilities to clients is to ensure that we have ready access to funds with which to settle claims, including large or multiple unforeseen claims. We would generally expect that positive cash flow from operations (underwriting activities and investment income) will be sufficient to cover cash outflows under most future loss scenarios. However, there is a possibility that unforeseen demands could be placed on us due to extraordinary events and, as such, our liquidity needs may change. Such events include, among other things: several significant catastrophes occurring in a relatively short period of time resulting in material incurred losses; rating agency downgrades of our core insurance and reinsurance subsidiaries that would require posting of collateral in connection with our letter of credit and revolving credit facilities; the return of unearned premiums and/or the settlement of derivative transactions and large scale uncollectible reinsurance recoverables on paid losses (as a result of coverage disputes, reinsurers' credit problems or decreases in the value of collateral supporting reinsurance recoverables). Any one or a combination of such events may cause a liquidity strain for us. In addition, a liquidity strain could also occur when there is illiquidity in financial markets, such as that which was experienced in 2008. Investments that may be used to meet liquidity needs in the event of a liquidity strain may not be liquid due to inactive markets, or may have to be sold at a significant loss as a result of depressed prices. Because each subsidiary focuses on a more limited number of specific product lines than is collectively available from the consolidated group of companies, the mix of business tends to be less diverse at the subsidiary level. As a result, the probability of a liquidity strain, as described above, may be greater for individual subsidiaries than when liquidity is assessed on a consolidated basis. If such a liquidity strain were to occur in a subsidiary, XL-Ireland may be required to contribute capital to the particular subsidiary and/or curtail dividends from the subsidiary that would otherwise support holding company operations and dividend payments, which may be difficult given that XL-Ireland is a holding company and has limited liquidity.

A downgrade below "A-" of our principal insurance and reinsurance subsidiaries by either S&P or A.M. Best, which is three notches below the current S&P financial strength rating of "A+" (Stable) and two notches below the A.M. Best financial strength rating of "A" (Stable) of these subsidiaries, may trigger cancelation provisions in a significant amount of our assumed reinsurance agreements and may potentially require us to return unearned premiums to cedants. In addition, due to collateral posting requirements under our letter of credit and revolving credit facilities, such a downgrade may require the posting of cash collateral in support of certain "in use" portions of these facilities. Specifically, a downgrade below "A-" by A.M. Best would constitute an event of default under our two largest credit facilities and may trigger such collateral requirements. In certain limited instances, such downgrades may require that we return cash or assets to counterparties or to settle derivative and/or other transactions with the respective counterparties. See Item 1A, "Risk Factors," included in our Annual Report on Form 10-K for the year ended December 31, 2015.

Holding Company Liquidity

As holding companies, XL-Ireland and XL-Cayman have no operations of their own and their assets consist primarily of investments in subsidiaries. XL-Ireland's principal uses of liquidity are ordinary share-related transactions, including dividend payments to holders of its ordinary shares as well as share buybacks, acquisition activity, capital investments in its subsidiaries and certain corporate operating expenses. XL-Cayman's principal uses of liquidity are preference share related transactions, including dividend payments to its preference shareholders as well as preference share buybacks from time to time, interest and principal payments on debt, dividends to XL-Ireland and certain corporate operating expenses. Except for the trust preferred securities assumed as part of the Allied Acquisition as noted below, all of our outstanding debt securities were issued by XL-Cayman.

XL-Ireland's future cash flows largely depend on the availability of dividends or other permissible payments from subsidiaries to make principal and interest payments on debt, to pay operating expenses and ordinary shareholder dividends, to make capital investments in subsidiaries and to pay other obligations that may arise from time to time. The ability of our subsidiaries to pay dividends to us or return capital from shareholders' equity is limited by applicable laws and regulations of the various jurisdictions in which we operate, certain additional required regulatory approvals and financial covenants contained in our letters of credit and revolving credit facilities. The payment of dividends by our principal operating subsidiaries is regulated under the laws of various jurisdictions including Bermuda, the U.K., Ireland and Switzerland, certain insurance statutes of various states in the United States in which the principal operating subsidiaries are licensed to transact business, the other jurisdictions where we have regulated subsidiaries and regulations of the Society of Lloyd's. See Item 8, Note 23, "Statutory Financial Data," to the Consolidated Financial Statements included in our Annual Report on Form 10-K for the year ended December 31, 2015 for further discussion and details regarding the dividend capacity of our major operating subsidiaries. See also Item 1A, "Risk Factors - Our holding company structure and certain regulatory and other constraints affect our ability to pay dividends, make payments on our debt securities and make other payments," included in our Annual Report on Form 10-K for the year ended December 31, 2015. No assurance can be given that our subsidiaries will pay dividends in the future to XL-Ireland and XL-Cayman.

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Under Irish law, XL-Ireland is required to pay cash dividends as well as redeem and buy back shares from distributable reserves. As of March 31, 2016, XL-Ireland had $2.5 billion in distributable reserves.

As of March 31, 2016, XL-Ireland and XL-Cayman held cash and investments, net of liabilities associated with cash sweeping arrangements, of $8.7 million and $0.8 billion, respectively, compared to $11.6 million and $0.9 billion, respectively, as of December 31, 2015.

Excluding the trust preferred securities acquired as part of the Allied Acquisition as described in Item 1, Note 3(a), "Acquisitions and Disposals - Allied Acquisition," and Item 1, Note 10, "Notes Payable and Debt and Financing Arrangements," to the Unaudited Consolidated Financial Statements included herein, all of our outstanding debt as of March 31, 2016 was issued by XL-Cayman. The ability of XL-Cayman, like that of XL-Ireland, to obtain funds from its subsidiaries to satisfy any of its debts, including obligations under guarantees, is subject to certain contractual restrictions, applicable laws and statutory requirements of the various countries in which we operate, including, among others, Bermuda, the United States, Ireland, Switzerland and the United Kingdom. For details of the required statutory capital and surplus for our principal operating subsidiaries, see Item 8, Note 23, "Statutory Financial Data," included in our Annual Report on Form 10-K for the year ended December 31, 2015. See also the Unaudited Consolidated Statements of Cash Flows in Item 1, Financial Statements included herein.

We believe that we have adequate capital resources in the aggregate, and that our subsidiaries have the ability to produce sufficient cash flows, to meet expected claims payments and operational expenses and to provide dividend payments to XL-Cayman and XL-Ireland. In turn, we anticipate that we will have adequate capital resources, or the access to capital resources, to meet our obligations, including but not limited to dividend payments to our shareholders, interest payments on our senior and subordinated notes and other liabilities as they come due.

Sources of Liquidity

As of March 31, 2016, on a consolidated basis we had cash and cash equivalents of approximately $2.8 billion as compared to approximately $3.3 billion as of December 31, 2015. We have three main sources of cash flows - those provided (used) by operating activities, investing activities and financing activities:

(U.S. dollars in thousands)	March 31, 2016			March 31, 2015
Operating activities	$	(171,113	)	$	34,978
Investing activities	$	203,961		$	(195,554	)
Financing activities	$	(448,791	)	$	896,093
Effects of exchange rate changes on foreign currency cash	$	(19,396	)	$	(47,397	)

Operating Cash Flows

Historically, cash receipts from operations that are typically derived from the receipt of investment income on our investment portfolio as well as the net receipt of premiums less claims and expenses related to our underwriting activities have generally provided sufficient funds to pay losses as well as operating expenses of our subsidiaries and to fund dividends payable by our subsidiaries to XL-Ireland and XL-Cayman. Our operating subsidiaries provide liquidity in that premiums are generally received months or even years before losses are paid under the policies related to such premiums. Premiums and acquisition expenses are settled based on terms of trade as stipulated by an underwriting contract, and generally are received within the first year of inception of a policy when the premium is written, but can be up to three years on certain reinsurance business assumed. Operating expenses are generally paid within a year of being incurred. Claims, especially for the casualty business, may take a much longer time before they are reported and ultimately settled, requiring the establishment of reserves for unpaid losses and loss expenses. Therefore, the amount of claims paid in any one year is not necessarily related to the amount of net losses incurred, as reported in the consolidated statement of income.

During the three months ended March 31, 2016, net cash flows used in operating activities was $171.1 million compared to net cash flows provided by operating activities of $35.0 million for the same period in 2015. Consistent with prior years, while our premiums written and earned increased during the three months ended March 31, 2016 compared to the same period of 2015, largely due to the Catlin Acquisition, contracts written in the first quarter are generally collected later in the year, which has an adverse effect on our operating cash flow in the first quarter.

Investing Cash Flows

Generally, positive cash flow from operations and financing activities is invested in our investment portfolio, including affiliates, or the acquisition of subsidiaries.

Net cash provided by investing activities was $204.0 million in the three months ended March 31, 2016 compared to net cash used of $195.6 million for the same period in 2015. The increase in cash flow is mainly attributable to favorable proceeds

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from the sale and redemptions of fixed maturities and short-term investments compared to purchases, partially offset by purchases of affiliates and other equity securities, as well as the purchase of Allied, net of acquired cash, as noted in Item 1, Note 3(a), "Acquisitions and Disposals - Allied Acquisition" to the Unaudited Consolidated Financial Statements included herein.

As further outlined in Item 1, Note 6, "Investments," to the Unaudited Consolidated Financial Statements included herein, certain assets of the investment portfolio are pledged as collateral under our letter of credit facilities and for other purposes. As of March 31, 2016 and December 31, 2015, the Company had $19.0 billion and $18.3 billion in pledged assets, respectively. Of these pledged assets, we have determined in accordance with the accounting policy outlined in Item 8, Note 2(i), "Significant Accounting Policies - Cash Equivalents," to the Consolidated Financial Statements included in our Annual Report on Form 10-K for the year ended December 31, 2015, cash in the amount of $161.0 million as of March 31, 2016 is restricted and has been disclosed as such in our consolidated balance sheet.

Financing Cash Flows

Cash flows related to financing activities include ordinary share-related transactions, the payment of dividends, the issue or repayment of preference ordinary shares, the issue or repayment of debt and deposit liability transactions. During the three months ended March 31, 2016, net cash flows used in financing activities was $448.8 million, mainly due to the buyback of ordinary shares, as well as dividends paid to ordinary shareholders and distributions to non-controlling interests. See "Other Key Focuses of Management - Capital Management" for information regarding share buyback activity.

In addition, the Company maintains credit facilities that provide liquidity. Details of these facilities are described below in "Capital Resources."

Capital Resources

As of March 31, 2016 and December 31, 2015, we had total shareholders' equity of $13.7 billion. In addition to ordinary share capital, we depend on external sources of financing to support our underwriting activities in the form of:

• debt;

• XL-Cayman and Catlin Insurance Company Ltd. ("Catlin-Bermuda") preference shares;

• letter of credit facilities and other sources of collateral; and

• revolving credit facilities.

In particular, we require, among other things:

▪ sufficient capital to maintain our financial strength and credit ratings, as issued by several ratings agencies, at levels considered necessary by management to enable our key operating subsidiaries to compete;

▪ sufficient capital to enable our regulated subsidiaries to meet the regulatory capital levels required in the United States, the U.K., Bermuda, Ireland, Switzerland and other key markets;

▪ letters of credit and other forms of collateral that are required to be posted or deposited, as the case may be, by our operating subsidiaries that are "non-admitted" under U.S. state insurance regulations in order for the U.S. cedant to receive statutory credit for reinsurance. We also use letters of credit to support our operations at Lloyd's; and

▪ revolving credit facilities to meet short-term liquidity needs.

The following risks are associated with our requirement to renew or obtain new credit facilities:

▪ the credit available from banks may be reduced due to market conditions resulting in our need to pledge our investment portfolio to customers, which could result in a lower investment yield;

▪ we may be downgraded by one or more rating agencies, which could materially and negatively impact our business, financial condition, results of operations and/or liquidity; and

▪ the volume of business that our subsidiaries that are not admitted in the United States are able to transact could be reduced if we are unable to obtain letter of credit facilities at an appropriate amount.

Consolidation within the banking industry may result in the reduction of the aggregate amount of credit provided to us . We attempt to mitigate this risk by identifying and/or selecting additional banks that can participate in the credit facilities upon renewal. See Item 1A, "Risk Factors - We may require additional capital in the future, which may not be available to us on satisfactory terms, on a timely basis or at all," included in our Annual Report on Form 10-K for the year ended December 31, 2015.

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The following table summarizes the components of our current capital resources:

(U.S. dollars in thousands)	March 31, 2016		December 31, 2015
Non-controlling interests - Series D preference ordinary shares of XL-Cayman	$	345,000	$	345,000
Non-controlling interests - Series E preference ordinary shares of XL-Cayman	999,500		999,500
Non-controlling interests - preference shares of Catlin-Bermuda	562,285		562,285
Non-controlling interests - Other	72,189		70,599
Ordinary share capital	11,688,744		11,677,079
Total ordinary shares and non-controlling interests	$	13,667,718	$	13,654,463
Notes payable and debt	2,653,895		2,644,970
Total	$	16,321,613	$	16,299,433

Ordinary Share Capital

The following table reconciles the opening and closing ordinary share capital positions as follows:

(U.S. dollars in thousands)	March 31, 2016			December 31, 2015
Ordinary shareholders’ equity – beginning of period	$	11,677,079		$	10,033,751
Net income (loss) attributable to ordinary shareholders	21,885			1,207,152
Share buybacks	(355,900		)	(468,971		)
Share issuances	512			1,861,538
Ordinary share dividends	(58,714		)	(211,814		)
Change in accumulated other comprehensive income	407,941			(797,842		)
Share-based compensation and other	(4,059		)	53,265
Ordinary shareholders’ equity – end of period	$	11,688,744		$	11,677,079

Preferred Shares - Non-controlling Interest in Equity of Consolidated Subsidiaries

The Series D preference ordinary shares and the Series E preference ordinary shares were issued by XL-Cayman. As a result of the Catlin Acquisition, we also acquired the preference shares issued by Catlin-Bermuda. Accordingly, these instruments represent non-controlling interests in our consolidated financial statements and are presented as non-controlling interest in equity of consolidated subsidiaries. As of both March 31, 2016 and December 31, 2015, the face values of the outstanding Series D and Series E preference ordinary shares were $345.0 million and $999.5 million, respectively. The value of the preference shares issued by Catlin-Bermuda as of March 31, 2016 was $562.3 million.

Debt

The following tables present our debt under outstanding securities and lenders' commitments as of March 31, 2016:

						Payments Due by Period
(U.S. dollars in thousands)	Commitment/ Debt (1)		In Use/ Outstanding (2)		Year of Expiry	Less than 1 Year		1 to 3 Years		3 to 5 Years		After 5 Years
2.30% Senior Notes	300,000		298,183		2018	—		300,000		—		—
5.75% Senior Notes	400,000		397,630		2021	—		—		—		400,000
6.375% Senior Notes	350,000		349,057		2024	—		—		—		350,000
4.45% Subordinated Notes	500,000		492,723		2025	—		—		—		500,000
6.25% Senior Notes	325,000		323,257		2027	—		—		—		325,000
Trust Preferred Securities, face amount $8m, due 2035	8,248		8,248		2035	—		—		—		8,248
5.25% Senior Notes	300,000		296,328		2043	—		—		—		300,000
5.5% Subordinated Notes	500,000		488,469		2045	—		—		—		500,000
Total	$	2,683,248	$	2,653,895		$	—	$	300,000	$	—	$	2,383,248

_______________

(1)    Excluded from this table are credit facilities under which we are permitted to utilize up to $1.4 billion and $1.4 billion as of March 31, 2016 and December 31, 2015, respectively, for revolving loans to support general operating and financial needs. However, as of March 31, 2016 and December 31, 2015, $526.5 million and $527.1 million, respectively, were utilized under these facilities as letters of credit, leaving $823.5 million and $822.9 million, respectively, available to support other operating and financing needs.

(2)    "In Use/Outstanding" data represent March 31, 2016 accreted values. "Payments Due by Period" data represents ultimate redemption values.

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In addition, see Item 8, Note 14, "Notes Payable and Debt and Financing Arrangements," to the Consolidated Financial Statements included in our Annual Report on Form 10-K for the year ended December 31, 2015 for further information.

As of March 31, 2016, outstanding debt held by investors as follows consisted of senior and subordinated unsecured notes of approximately $2.6 billion issued by XL-Cayman and guaranteed by XL-Ireland. These notes require XL-Cayman to pay a fixed rate of interest during their terms. As of March 31, 2016, the outstanding issues of unsecured notes are as follows:

▪ $300 million senior notes due December 2018, with a fixed coupon of 2.30%. The notes are listed on the New York Stock Exchange. The notes were issued at 99.69% of the face amount and net proceeds were $296.6 million. Related expenses of the offering amounted to $2.5 million.

▪ $400 million senior notes due October 2021, with a fixed coupon of 5.75%. The notes are listed on the New York Stock Exchange. The notes were issued at 100.0% of the face amount and net proceeds were $395.7 million. Related expenses of the offering amounted to $4.3 million.

▪ $350 million senior notes due November 2024, with a fixed coupon of 6.375%. The notes are publicly traded. The notes were issued at 100.0% of the face amount and net proceeds were $347.8 million. Related expenses of the offering amounted to $2.2 million.

▪ $500 million subordinated notes due March 2025, with a fixed coupon of 4.45%. The notes are listed on the New York Stock Exchange. The notes were issued at 99.633% of the face amount and net proceeds were $492.2 million. Related expenses of the offering amounted to $5.9 million.

▪ $325 million senior notes due May 2027, with a fixed coupon of 6.25%. The notes are publicly traded. The notes were issued at 99.805% of the face amount and net proceeds were $321.9 million. Related expenses of the offering amounted to $2.5 million.

▪ $300 million senior notes due December 2043, with a fixed coupon of 5.25%. The notes are listed on the New York Stock Exchange. The notes were issued at 99.77% of the face amount and net proceeds were $296.0 million. Related expenses of the offering amounted to $3.3 million.

▪ $500 million subordinated notes due March 2045, with a fixed coupon of 5.5%. The notes are listed on the New York Stock Exchange. The notes were issued at 99.115% of the face amount and net proceeds were $488.4 million. Related expenses of the offering amounted to $7.2 million.

As a result of the Allied Acquisition described in Item 1, Note 3(a), "Acquisitions and Disposals - Allied Acquisition," to the Unaudited Consolidated Financial Statements included herein, the Company assumed $8.2 million of trust preferred securities, due in 2035 and bearing a floating interest rate, adjustable quarterly, at three-month LIBOR plus 3.75%. The Company has given notice that these securities will be retired at the next interest payment date on June 15, 2016.

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Letter of Credit Facilities and other sources of collateral

As of March 31, 2016, we had fifteen letter of credit ("LOC") facilities in place with total availability of $4.5 billion, of which $2.5 billion was utilized.

(U.S. dollars in thousands)						Amount of Commitment Expiration by Period
Facility Name (1)	Commitment/ Debt		In Use/ Outstanding		Year of Expiry	Less than 1 Year		1 to 3 Years		3 to 5 Years		After 5 Years
Syndicated Unsecured Facility (2)	$	1,000,000	$	181,475	2018	$	—	$	1,000,000	$	—	$	—
Syndicated Secured Facility (2)	1,000,000		670,254		2018	—		1,000,000		—		—
Citi E.U. Facility	600,000		101,020		Continuous	—		—		—		600,000
London Market Facility	250,000		120,988		Continuous	—		—		—		250,000
2015 Citi Facility	250,000		245,000		2017	—		250,000		—		—
Goldman Facility	200,000		200,000		2017	—		200,000		—		—
2013 Citi Facility	100,000		100,000		2016	100,000		—		—		—
ING Facility	150,000		47,000		Continuous	—		—		—		47,000
FAL Facility I	125,000		125,000		2019	—		—		125,000		—
FAL Facility II	125,000		125,000		2019	—		—		125,000		—
FAL Facility III	125,000		125,000		2019	—		—		125,000		—
FAL Facility IV	125,000		125,000		2019	—		—		125,000		—
LOC Facility	230,000		160,268		Continuous	—		—		—		230,000
LOC Facility	215,000		213,463		Continuous	—		—		—		215,000
LOC Facility	8,617		8,617		2016	—		—		—		8,617
Total LOC facilities (3)	$	4,503,617	$	2,548,085		$	100,000	$	2,450,000	$	500,000	$	1,350,617

____________

(1) Terms used in this table are defined in the discussion below.

(2) We have the option to increase the size of the facilities under the Syndicated Credit Agreements by an additional $500 million across both such facilities.

(3) As of March 31, 2016, the portion of the total credit facilities permitted to be utilized for revolving loans was $1.4 billion. However, $526.5 million of this allowable portion was utilized to issue letters of credit, leaving $823.5 million available either to issue additional letters of credit or to support other operating or financing needs under these particular facilities.

In November 2015, we entered into four bilateral unsecured credit agreements, each providing for $125 million of letters of credit for Funds at Lloyd’s purposes ("FAL Facility I," "FAL Facility II," "FAL Facility III," and "FAL Facility IV" in the table above, and collectively the "FAL Facilities") for an aggregate amount of $500 million. Each of the FAL Facilities expires in 2019. The FAL Facilities replaced four unsecured bilateral facilities available for utilization by Catlin-Bermuda for Funds at Lloyd's purposes that we terminated in November 2015.

On June 10, 2015, XL-Cayman entered into the fifth amendment to the credit agreement with Citicorp USA, Inc., as administrative agent and issuing lender, and the lenders party thereto (as amended, the "2015 Citi Facility"). The 2015 Citi Facility and a continuing agreement for standby letters of credit with Citibank, N.A. were initially entered into on May 7, 2013.

On November 4, 2013, XL-Cayman entered into a credit agreement with Citicorp USA, Inc., as administrative agent and issuing lender, and the lenders party thereto and a continuing agreement for standby letters of credit with Citibank, N.A. (the "2013 Citi Facility" and, together with the 2015 Citi Facility, the "Citi Agreements").

Collectively, the Citi Agreements and the continuing agreements for standby letters of credit provide for issuance of letters of credit and revolving credit loans in an aggregate amount of up to $350 million. XL-Cayman has the option to increase the maximum amount of letters of credit and revolving credit loans available under the 2013 Citi Agreements with the lender's and issuing lender's consent.

The commitments under the Citi Agreements expire on, and such credit facilities are available until, the earlier of (i) June 20, 2017 (with respect to the 2015 Citi Facility) and December 20, 2016 (with respect to the 2013 Citi Facility) and (ii) the date of termination in whole of the commitments upon an optional termination or reduction of the commitments by the account parties or upon the occurrence of certain events of default.

On September 8, 2015, XL-Cayman entered into a new credit agreement with Goldman Sachs Mortgage Company, as administrative agent and issuing lender, and a continuing agreement for standby letters of credit with Goldman Sachs Bank USA. On September 9, 14, and 16, 2015, XL-Cayman entered into first, second and third amendments, respectively, to such credit agreement (as amended, the Goldman Facility"). XL-Cayman entered into the Goldman Facility to replace the letter of credit capacity under a credit agreement with Citicorp USA, Inc. initially entered into on August 6, 2013 that expired by its terms on September 20, 2015.

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The Goldman Facility and the continuing agreement for standby letters of credit provide for issuance of letters of credit in an aggregate amount of up to $200 million. XL-Cayman has the option to increase the maximum amount of letters of credit available under the Goldman Facility with the lender's and issuing lender's consent.

The commitments under the Goldman Facility expire on, and such credit facility is available until, the earlier of (i) September 20, 2017 and (ii) the date of termination in whole of the commitments upon an optional termination or reduction of the commitments by the account parties or upon the occurrence of certain events of default.

On December 30, 2014, we reduced the capacity available under a continuous letter of credit facility between XLIB and Citibank Europe plc (the "Citi E.U. Facility") from $750 million to $600 million simultaneous with XLIB entering into a continuous $150 million letter of credit facility with ING Bank N.V., London Branch (the "ING Facility"). Both the Citi E.U. Facility and the ING Facility are collateralized by pledged financial assets.

In November 2013, we (i) entered into two credit agreements (together, the "Syndicated Credit Agreements"), which provide for an aggregate amount of outstanding letters of credit and revolving loans of up to $2 billion, subject to certain options to increase the sizes of the facilities.

The Syndicated Credit Agreements consist of (i) a secured credit agreement, which provides for the issuance of up to $1 billion of letters of credit and is collateralized by pledged financial assets (the "Syndicated Secured Facility"), and (ii) an unsecured credit agreement, which provides for the issuance of up to $1 billion of letters of credit and revolving loans (the "Syndicated Unsecured Facility"). We have the option to increase the maximum amount of letters of credit available by an additional $500 million across these facilities under the Syndicated Credit Agreements.

The commitments under the Syndicated Credit Agreements expire on, and such credit facilities are available until, the earlier of (i) November 22, 2018 and (ii) the date of termination in whole of the commitments upon an optional termination or reduction of the commitments by the account parties or upon the occurrence of certain events of default.

The availability of letters of credit under the Syndicated Secured Facility is subject to a borrowing base requirement, determined on the basis of specified percentages of the face value of eligible categories of assets varying by type of collateral. In the event that such credit support is insufficient, we could be required to provide alternative security to cedants. This could take the form of insurance trusts supported by our investment portfolio or funds withheld (amounts retained by ceding companies to collateralize loss or premium reserves) using our cash resources or combinations thereof. The face amount of letters of credit required is driven by, among other things, loss development of existing reserves, the payment pattern of such reserves, the expansion of business written by us and the loss experience of such business.

We have $250 million of available capacity pursuant to a continuous credit agreement between XL Re Ltd and Citibank N.A. that is collateralized by pledged financial assets (the "London Market Facility").

As a result of the Catlin Acquisition, we assumed, and may continue to access, the following letter of credit facilities:

• A bilateral facility pursuant to a continuous credit agreement, available for utilization by Catlin-Bermuda, collateralized by pledged financial assets (the "CICL Facility"). As of March 31, 2016, $230 million of capacity was available under this facility.

• A bilateral facility pursuant to a continuous credit agreement, available for utilization by Catlin Re Switzerland Ltd ("CRCH"), collateralized by pledged financial assets (the "CRCH Facility"). As of March 31, 2016, $175 million of capacity was available under this facility.

• A facility managed by Lloyd's, acting for Catlin Syndicate 2003 (the "Syndicate 2003 Facility"). As of March 31, 2016, $9 million of letters of credit were issued under this facility.

In addition to letters of credit, we have established insurance trusts in the U.S. that provide cedants with statutory credit for reinsurance under state insurance regulation in the U.S.

We review current and projected collateral requirements on a regular basis, as well as new sources of collateral. Our objective is to maintain an excess amount of collateral sources over expected uses. We also review our liquidity needs on a regular basis.

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ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

General

The following risk management discussion and the estimated amounts generated from the sensitivity and value-at-risk ("VaR") analyses presented in this document are forward-looking statements of market risk assuming certain adverse market conditions occur. Actual results in the future may differ materially from these estimated results due to, among other things, actual developments in the global financial markets and changes in the composition of our investment portfolio. The results of analysis used by us to assess and mitigate risk should not be considered projections of future events of losses. See Item 2, "Management's Discussion and Analysis of Financial Condition and Results of Operations - Liquidity and Capital Resources - General - Cautionary Note Regarding Forward-Looking Statements."

As described in Item 1, Note 1, "Basis of Preparation and Consolidation," to the Unaudited Consolidated Financial Statements included herein, in connection with the GreyCastle Life Retro Arrangements, the Life Funds Withheld Assets are managed pursuant to agreed upon investment guidelines that meet the contractual commitments of the XL ceding companies and applicable laws and regulations. All of the investment results associated with the Life Funds Withheld Assets ultimately accrue to GCLR. Because we no longer share in the risks and rewards of the underlying performance of the supporting invested assets, quantitative and qualitative disclosures about market risk exclude the Life Funds Withheld Assets.

Market risk represents the potential for loss due to adverse changes in the fair value of financial and other instruments. We are principally exposed to the following market risks: interest rate risk, foreign currency exchange rate risk, credit risk, equity price risk and other related market risks.

The majority of our market risk arises from the investment portfolio, which consists of fixed income securities, hedge fund investments, public equities, private investments (including funds), derivatives, other investments and cash, denominated in both U.S. and foreign currencies, which are sensitive to changes in interest rates, credit spreads, equity prices, foreign currency exchange rates and other related market risks. Our fixed income and equity securities are generally classified as available for sale, and, as such, changes in interest rates, credit spreads on corporate and structured securities, equity prices, foreign currency exchange rates or other related market instruments will have an immediate effect on comprehensive income and shareholders' equity but will not ordinarily have an immediate effect on net income. Nevertheless, changes in interest rates, credit spreads and defaults, equity prices and other related market instruments affect consolidated net income when, and if, a security is sold or impaired.

We may enter into derivatives to reduce risk or enhance portfolio efficiency. For example, we may use derivatives to hedge foreign exchange and interest rate risk related to our consolidated net exposures or to efficiently gain exposure to investments that are eligible under our investment policy. From time to time, we may also use instruments such as futures, options, interest rate swaps, total return swaps, credit default swaps and swaptions, and foreign currency forward contracts to manage the risk of interest rate changes, credit deterioration, foreign currency exposures, and other market related exposures as well as to obtain exposure to a particular financial market. We seek to manage the risks associated with the use of derivatives through our comprehensive framework of investment decision authorities ("Authorities Framework"). Derivative instruments are carried at fair value with the resulting changes in fair value recognized in income in the period in which they occur. For further information, see Item 1, Note 7, "Derivative Instruments," to the Unaudited Consolidated Financial Statements included herein.

Interest Rate Risk (Excluding Life Funds Withheld Assets)

Interest rate risk is the price sensitivity of a fixed income security to changes in interest rates. Our fixed income portfolio is exposed to interest rate risk. Our liabilities are accrued at a static rate from an accounting standpoint. However, management considers the liabilities to have an economic exposure to interest rate risk and manages the net economic exposure to interest rate risk considering both assets and liabilities. Interest rate risk is managed within the context of our Strategic Asset Allocation ("SAA") process by specifying a SAA benchmark relative to the estimated duration of our liabilities and managing the fixed income portfolio relative to the benchmarks such that the overall economic effect of interest rate risk is within management's risk tolerance. Nevertheless, we remain exposed to interest rate risk with respect to our overall net asset position and more generally from an accounting standpoint since the assets are carried at fair value, while liabilities are accrued at a static rate. We may utilize derivative instruments via an interest rate overlay strategy to manage or optimize our duration and curve exposures.

In addition, while our debt is not carried at fair value and not adjusted for market changes, changes in market interest rates could have an impact on debt values at the time of any refinancing.

Foreign Currency Exchange Rate Risk (Excluding Life Funds Withheld Assets)

Many of our non-U.S. subsidiaries maintain both assets and liabilities in local currencies; therefore, foreign exchange risk is generally limited to net assets denominated in foreign currencies.

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Foreign currency exchange rate gains and losses in our consolidated Statements of Income arise for accounting purposes when net assets or liabilities are denominated in foreign currencies that differ from the functional currency of those subsidiaries. While unrealized foreign exchange gains and losses on underwriting balances are reported in earnings, the offsetting unrealized gains and losses on invested assets are recorded as a separate component of shareholders' equity, to the extent that the asset currency does not match that entity's functional currency. This results in an accounting mismatch that will result in foreign exchange gains or losses in the consolidated statements of income depending on the movement in certain currencies. We have formed several branches with Euro and U.K. sterling functional currencies and continue to focus on attempting to limit exposure to foreign exchange risk.

Foreign currency exchange rate risk in general is reviewed as part of our risk management framework. Within the asset liability framework for the investment portfolio, we pursue a general policy of holding the assets and liabilities in the same currency and, as such, we are not generally exposed to the risks associated with foreign exchange movements within the investment portfolio, as currency impacts on the assets are generally matched by corresponding impacts on the related liabilities. However, locally-required capital levels are invested in local currencies in order to satisfy regulatory requirements and to support local insurance operations and are not matched by related liabilities. Foreign exchange contracts within the investment portfolio may be utilized to manage individual portfolio foreign exchange exposures, subject to investment management service providers' guidelines established by management. Where these contracts are not designated as specific hedges for financial reporting purposes, we record realized and unrealized gains and losses in income in the period in which they occur. These contracts generally have maturities of three months or less. We may also attempt to manage the foreign exchange volatility arising on certain transactions denominated in foreign currencies. These include, but are not limited to, premiums receivable, reinsurance contracts, claims payable and investments in subsidiaries.

The principal currencies creating our foreign exchange risk are the U.K. sterling, the Euro, the Swiss franc and the Canadian dollar. The following table provides more information on our net exposures to these principal foreign currencies as of March 31, 2016 and December 31, 2015:

(Foreign currency in millions)	March 31, 2016		December 31, 2015
Euro	146.0		25.6
U.K. Sterling	136.2		(34.6	)
Swiss Franc	(26.5	)	(11.5	)
Canadian Dollar	316.5		293.9

Credit Risk (Excluding Life Funds Withheld Assets)

Credit risk relates to the uncertainty of an obligor's continued ability to make timely payments in accordance with the contractual terms of the instrument or contract. We are exposed to direct credit risk within our investment portfolio, through general counterparties, including customers and reinsurers, and through certain underwriting activities that include, but are not limited to, surety, workers' compensation, environmental and political risk and trade credit.

We have an established credit risk governance process delegated to the Credit Risk Committee. The governance process is designed to ensure that transactions and activities, individually and in the aggregate, are carried out within established risk tolerances. This process also recognizes the potential for clash event risk (which covers a number of substantially similar claims against multiple policyholders) that could arise from credit events owing to the identified credit risk embedded in certain underwriting businesses, as well as our investment activities and reinsurance relationships. In particular, certain of our underwriting activities expose us to indirect credit risk in that profitability of certain strategies can correlate with credit events at the issuer, industry or country level. We manage these risks through established underwriting policies that operate in accordance with established limit and escalation frameworks.

To manage our exposure to credit risk, we have established a credit risk framework that establishes tolerances for credit risk at various levels of granularity (counterparty, industry, country and underwriting business) and tolerances for credit risk arising from certain clash events. Credit risk capacity is allocated across our businesses and functional areas and regular reporting and aggregation activities are carried out to ensure compliance with our credit risk framework and related tolerances. Credit risk arising from credit sensitive underwriting activities is also managed via our underwriting limit framework. We manage credit risk within the investment portfolio through our Authorities Framework and established investment credit policies, which address the quality of obligors and counterparties, industry limits, and diversification requirements. Our exposure to market credit spreads primarily relates to market price and cash flow variability associated with changes in credit spreads.

Our credit risk framework establishes a 1% exceedance credit clash limit at a level not to exceed approximately 25% of Adjusted Tangible Capital in order to manage the direct and indirect credit exposures arising from underwriting and non-

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underwriting activities that could potentially be impacted in various degrees by a systemic credit event (e.g. our investment portfolio, credit sensitive underwriting activities, unsecured exposures arising from reinsurance recoverable counterparties, brokers and other obligor counterparties). If we were to deploy the full limit, there would be a 1% probability that an event would occur during the next year that would result in a net credit clash related loss in excess of the limit. See "Other Key Focuses of Management - Risk Management" for factors we consider in setting the credit clash risk tolerance as well as for factors that could cause a deviation between estimated and actual incurred losses.

Credit Risk – Investment Portfolio (Excluding Life Funds Withheld Assets)

Credit risk in the investment portfolio is the exposure to adverse changes in the creditworthiness of individual investment holdings, issuers, groups of issuers, industries and countries. A widening of credit spreads will increase the net unrealized loss position, will increase losses associated with credit-based derivatives where we assume credit exposure, and, if issuer credit spreads increase significantly for an extended period of time or it is a period of increasing defaults, will also likely result in higher OTTI charges. All else held equal, credit spread tightening will reduce net investment income associated with new purchases of fixed maturities. In addition, market volatility can make it difficult to value certain of our securities if trading becomes less frequent. As such, valuations may include assumptions or estimates that may have significant period to period changes that could have a material adverse effect on our consolidated results of operations or financial condition. The credit spread duration in our fixed income portfolio was 3.1 years as of March 31, 2016.

We manage credit risk in the investment portfolio, including fixed income, alternative and short-term investments, through the credit research performed by investment management service providers and our internal portfolio management team. The management of credit risk in the investment portfolio is integrated in our credit risk management governance framework and the management of credit exposures and concentrations within the investment portfolio is carried out in accordance with our risk policies, philosophies, appetites, limits and risk concentrations related to the investment portfolio. In the investment portfolio, we review on a regular basis our asset concentration, credit quality and adherence to our credit limit guidelines. Any issuer over its credit limits or experiencing financial difficulties or material credit quality deterioration or potentially subject to forthcoming credit quality deterioration is placed on a watch list for closer monitoring. Where appropriate, exposures are reduced or prevented from increasing.

See Item 2, "Management's Discussion and Analysis of Financial Condition and Results of Operations - Balance Sheet Analysis - Investments (Excluding Life Funds Withheld Assets," included herein for our aggregate fixed income portfolio credit rating in percentage terms of our aggregate fixed income portfolio as of March 31, 2016.

As of March 31, 2016 and December 31, 2015, the average credit quality of our aggregate fixed income investment portfolio was "AA." Our $14.0 billion portfolio of government and government related, agency, sovereign and cash holdings was rated "AA+," our $10.8 billion portfolio of corporates was rated "A," and our $6.2 billion structured securities portfolio was rated "AA+."

As of March 31, 2016, the top 5 corporate sector exposures listed below represented 26.7% of the aggregate fixed income investment portfolio and 77.2% of all corporate holdings.

Top 5 Sector Exposures (1) (U.S. dollars in millions)	Carrying Value		Percentage of Aggregate Fixed Income Portfolio
Financials	$	3,720.2	11.8	%
Consumer, non-Cyclical	1,971.1		6.3	%
Industrial	936.5		3.0	%
Consumer, Cyclical	934.9		3.0	%
Energy	812.6		2.6	%
Total	$	8,375.3	26.7	%

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(1) Government-guaranteed securities and Covered Bonds have been excluded from the above figures.

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We also have exposure to credit risk associated with our mortgage-backed and asset-backed securities. The table below shows the breakdown of the $6.2 billion structured securities portfolio, of which 92.7% is AAA rated:

(U.S. dollars in millions)	Carrying Value (1)		Percentage of Structured Portfolio
RMBS - Agency	$	4,367.0	70.7	%
RMBS - Non-Agency	302.8		4.9	%
CMBS	325.5		5.3	%
Core CDOs (non-ABS CDOs and CLOs)	21.7		0.4	%
Other ABS (1)	1,162.9		18.7	%
Total	$	6,179.9	100.0	%

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(1) Includes Covered Bonds.

Credit Risk – Other (Excluding Life Funds Withheld Assets)

Credit derivatives can be purchased within our investment portfolio. From time to time, we may purchase credit default swaps to hedge an existing position or concentration of holdings. The credit derivatives are recorded at fair value. For further details with respect to our exposure to credit derivatives, see Item 1, Note 7, "Derivative Instruments," to the Unaudited Consolidated Financial Statements included herein.

We have exposure to many different industries and counterparties, and routinely execute transactions with counterparties in the financial services industry, including brokers and dealers, commercial banks, investment banks, alternatives and other investment funds and other institutions. Many of these transactions expose us to credit risk in the event of default of our counterparty. In addition, with respect to secured transactions, our credit risk may be exacerbated when the collateral held by us cannot be sold or is liquidated at prices not sufficient to recover the full amount of the loan or derivative exposure that is due. We also have exposure to financial institutions in the form of unsecured debt instruments, derivative transactions, revolving credit facility and letter of credit commitments and equity investments. There can be no assurance that any such losses or impairments to the carrying value of these assets would not materially and adversely affect our business and results of operations.

With regard to unpaid losses and loss expenses recoverable and reinsurance balances receivable, we have credit risk should any of our reinsurers be unable or unwilling to settle amounts due to us; however, these exposures are not marked to market. For further information relating to reinsurer credit risk, see Item 2, "Management's Discussion and Analysis of Financial Condition and Results of Operations - Unpaid Losses and Loss Expenses Recoverable and Reinsurance Balances Receivable."

We are exposed to credit risk in the event of non-performance by the other parties to our derivative instruments in general; however, we do not anticipate non-performance. The difference between the notional principal amounts and the associated market value is our maximum credit exposure.

Equity Price Risk (Excluding Life Funds Withheld Assets)

Equity price risk is the potential loss arising from changes in the market value of equities. Our equity investment portfolio is exposed to equity price risk. As of March 31, 2016, our equity portfolio was approximately $878.4 million as compared to $878.9 million at December 31, 2015. As of March 31, 2016 and December 31, 2015, our direct allocation to equity securities was 2.5% and 2.4%, respectively, of the total investment portfolio (including cash and cash equivalents, accrued investment income and net payable for investments purchased). We also estimate the equity risk embedded in certain hedge fund and private investments (including funds). Such estimates are derived from market exposures provided to us by certain individual fund investments and/or internal statistical analyses.

Other Market Risks (Excluding Life Funds Withheld Assets)

Our private investments (including funds) portfolio is invested in limited partnerships and other entities that are not publicly traded. In addition to normal market risks, these positions may also be exposed to liquidity risk, risks related to distressed investments and risks specific to startup or small companies. As of March 31, 2016, our exposure to private investments (including funds), excluding unfunded commitments, was $482.5 million, representing 1.3% of the total investment portfolio (including cash and cash equivalents, accrued investment income and net payable for investments purchased) compared to $547.2 million as of December 31, 2015.

Our hedge fund investment portfolio, which is exposed to equity and credit risk as well as certain other market risks, had a total exposure of $1.8 billion representing approximately 4.9% of the total investment portfolio (including cash and cash equivalents, accrued investment income and net payable for investments purchased) as of March 31, 2016, as compared to

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December 31, 2015 when we had a total exposure of $1.6 billion representing approximately 4.4% of the total investment portfolio.

Our operating affiliate investment portfolio is invested in both investment managers and strategic and other affiliate investments. In addition to normal market risks, the positions may also be exposed to liquidity risk, risks related to distressed investments and risks specific to startup or small companies, had a total exposure of $502.1 million representing approximately 1.4% of the total investment portfolio (including cash and cash equivalents, accrued investment income and net payable for investments purchased) at March 31, 2016, as compared to December 31, 2015, when we had a total exposure of $322.0 million representing approximately 0.9% of the investment portfolio.

As noted above, we also invest in certain derivative positions that can be impacted by market value movements. For further details on derivative instruments, see Item 1, Note 7, "Derivative Instruments," to the Unaudited Consolidated Financial Statements included herein.

Sensitivity and Value-at-Risk Analysis (Excluding Life Funds Withheld Assets)

The table below summarizes our assessment of the estimated impact on the value of our investment portfolio as of March 31, 2016 associated with an immediate and hypothetical: +100bps increase in interest rates, a -10% decline in equity markets, a +100bps widening in spreads and a +10% widening in spreads. The table also reports the 95%, 1-year VaRs for our investment portfolios as of March 31, 2016, excluding foreign exchange. The interest rate, spread risk, and VaR shown in the table below exclude Life Funds Withheld Assets.

The table below also excludes the impact of foreign exchange rate risk on our investment portfolio. Our investment strategy incorporates asset-liability management, and, accordingly, any foreign exchange movements impact the assets and liabilities approximately equally. See "Foreign Currency Exchange Rate Risk" for further details. We consider the investment portfolio VaR estimated results excluding foreign exchange rate risk to be the more relevant and appropriate metric to consider when assessing the actual risk of the investment portfolio.

The estimated results below also do not include any risk contributions from our various operating affiliates (strategic, investment manager or financial operating affiliates) or certain other investments that are carried at amortized cost.

(U.S. dollars in millions)	Interest Rate Risk (1)			Equity Risk (2)			Absolute Spread Risk (3)			Relative Spread Risk (4)			VaR (5) (6)
Total Investment Portfolio (7)	$	(1,135.0	)	$	(237.6	)	$	(992.7	)	$	(79.1	)	$	844.4
(I) Fixed Income Portfolio	(1,130.9		)	—			(988.5		)	(78.2		)	816.7
(a) Cash & Short Term Investments	(13.0		)	—			(6.7		)	(0.9		)	4.6
(b) Total Government Related	(541.7		)	—			(302.9		)	(13.6		)	386.9
(c) Total Corporate Credit	(377.3		)	—			(425.9		)	(47.3		)	316.8
(d) Total Structured Credit	(199.0		)	—			(253.0		)	(16.4		)	142.4
(II) Non-Fixed Income Portfolio	—			(237.6		)	—			—			383.0
(e) Equity Portfolio	—			(87.4		)	—			—			224.1
(f) Hedge Fund Portfolio	—			(68.6		)	—			—			146.2
(g) Private Investments	—			(81.6		)	—			—			58.8

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(1) The estimated impact on the fair value of our fixed income portfolio of an immediate hypothetical +100 bps adverse parallel shift in global bond curves.

(2) The estimated impact on the fair value of our investment portfolio of an immediate hypothetical -10% change in the value of equity exposures in our equity portfolio, certain equity-sensitive hedge fund investments and private equity investments. This includes our estimate of equity risk embedded in the hedge fund and private investment portfolios with such estimates utilizing market exposures provided to us by certain individual fund investments, internal statistical analyses, and/or various assumptions regarding illiquidity and concentrations.

(3) The estimated impact on the fair value of our fixed income portfolio of an immediate hypothetical +100 basis point increase in all global government related, corporate and structured security spreads to which our fixed income portfolio is exposed. This excludes exposure to credit spreads in our hedge fund investments, private investments and counterparty exposure.

(4) The estimated impact on the fair value of our fixed income portfolio of an immediate hypothetical +10% increase in all global government related, corporate and structured security spreads to which our fixed income portfolio is exposed. This excludes exposure to credit spreads in our hedge fund investments, private investments and counterparty exposure.

(5) The VaR results are based on a 95% confidence interval, with a one-year holding period, excluding foreign exchange rate risk. Our investment portfolio VaR as of March 31, 2016 is not necessarily indicative of future VaR levels as these are based on statistical estimates of possible price changes and, therefore, exclude other sources of investment return such as coupon and dividend income.

(6) The VaR results are the standalone VaRs, based on the prescribed methodology, for each component of our Total Investment Portfolio. The standalone VaRs of the individual components are non-additive, with the difference between the summation of the individual component VaRs and their respective aggregations being due to diversification benefits across the individual components. In the case of the VaR results for our Total Investment Portfolio, the results also include the impact associated with our Business and Other investments.

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(7) Our Total Investment Portfolio also includes our Business and Other investments that do not form part of our Fixed Income Portfolio or Non-Fixed Income Portfolio. The individual results reported in the above table for our Total Investment Portfolio therefore represent the aggregate impact on our Fixed Income Portfolio, Non-Fixed Income Portfolio and the majority of our Other investments.

Stress Testing (Excluding Life Funds Withheld Assets)

VaR does not provide the means to estimate the magnitude of the loss in the 5% of occurrences when we expect the VaR level to be exceeded. To complement the VaR analysis based on normal market environments, we consider the impact on the investment portfolio in several different stress scenarios to analyze the effect of unusual market conditions. We establish certain stress scenarios that are applied to the actual investment portfolio. As these stress scenarios and estimated gains and losses are based on scenarios established by us, they will not necessarily reflect future stress events or gains and losses from such events. The results of the stress scenarios are reviewed on a regular basis to ensure they are appropriate, based on current shareholders' equity, market conditions and our total risk tolerance. It is important to note that, when assessing the risk of our investment portfolio, we do not take into account either the value or risk associated with the liabilities arising from our operations.

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ITEM 4. CONTROLS AND PROCEDURES

Conclusion Regarding the Effectiveness of Disclosure Controls and Procedures

Our management, with the participation of our Chief Executive Officer and Chief Financial Officer, evaluated the effectiveness of our disclosure controls and procedures as of the end of the period covered by this report. Based on that evaluation, the Chief Executive Officer and Chief Financial Officer concluded, except as noted below, that our disclosure controls and procedures, as of the end of the period covered by this report, were effective and provided reasonable assurance that the information required to be disclosed by us in reports filed under the Securities Exchange Act of 1934, as amended, is (i) recorded, processed, summarized, and reported within the time periods specified in the SEC's rules and forms, and (ii) accumulated and communicated to our management, including the Chief Executive Officer and Chief Financial Officer, as appropriate to allow timely decisions regarding required disclosure.

On May 1, 2015, the Company completed the Catlin Acquisition described in Item 1, Note 3(c), "Acquisitions and Disposals - Catlin Acquisition" to the Unaudited Consolidated Financial Statements included herein. Catlin's assets constituted approximately 26.1% of the Company's consolidated assets as of March 31, 2016 and revenue constituted approximately 48.9% of the Company's revenues for the three month period ended March 31, 2016. At this time, we are in the process of evaluating internal control over financial reporting for the Catlin businesses acquired, and accordingly, in reliance upon SEC interpretive guidance related to recent acquisitions, we did not consider the Catlin businesses when we evaluated our internal control over financial reporting for purposes of our evaluation of disclosure controls and procedures.

Changes in Internal Control Over Financial Reporting

There have been no changes in internal control over financial reporting identified in connection with our evaluation required pursuant to Rules 13a-15 or 15d-15 promulgated under the Securities Exchange Act of 1934, as amended, that occurred during the most recent fiscal quarter that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

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PART II – OTHER INFORMATION

ITEM 1. LEGAL PROCEEDINGS

We are subject to legal proceedings as described in our Annual Report on Form 10-K for the year ended December 31, 2015. There have been no material developments to such proceedings during the three months ended March 31, 2016.

See Part I, Item 1, Note 14(b), "Litigation " to the Unaudited Consolidated Financial Statements included herein.

ITEM 1A. RISK FACTORS

On February 29, 2016, the Company announced a proposal to change the parent holding company's place of incorporation to Bermuda from Ireland (the "Redomestication"). To effect the redomestication, a Bermuda exempted company, XL Group Ltd ("XL-Bermuda") would replace XL-Ireland as the ultimate holding company of the XL group of companies, and XL-Ireland's ordinary shareholders would receive one common share of XL-Bermuda in exchange for each ordinary share of XL-Ireland held by them. The Company expects to submit the proposal for Redomestication, along with related proposals, to its shareholders in the next several months and complete the transaction in the third quarter of 2016. The following risk factors relate solely to the proposed redomestication. Refer to Item 1A., "Risk Factors," in our Annual Report on Form 10-K for the year ended December 31, 2015 for additional risk factors.

The rights of shareholders will change if the Redomestication is consummated due to differences between Bermuda law and Irish law.

Because of differences between Bermuda law and Irish law, if the Redomestication is consummated, certain rights of shareholders will change. Certain of these changes will be conditioned on the approval of proposals at the shareholder meetings relating to the adoption of bye-laws of XL-Bermuda. A discussion of material differences in shareholder rights between XL-Ireland and XL-Bermuda will be included in the definitive proxy statement relating to the Redomestication. Further, because XL-Bermuda will not be incorporated in Ireland, if the Redomestication is consummated, attempted takeovers of XL-Bermuda would not, as a matter of law, be subject to the Irish Takeover Rules nor review by the Irish Takeover Panel.

The anticipated benefits of the Redomestication may not be realized.

We may not realize the benefits we anticipate from the Redomestication. Our failure to realize those benefits could have a material and adverse effect on our business, results of operations or financial condition.

If the Irish High Court does not sanction the scheme of arrangement, XL-Ireland will not have the ability to effect the Redomestication.

The Redomestication is expected to be effectuated through a scheme of arrangement (the “Scheme of Arrangement”) that must be sanctioned by the High Court of Ireland (the "Irish High Court"). We cannot proceed with the Redomestication unless the Irish High Court sanctions the Scheme of Arrangement after conducting a sanction hearing. Assuming that the shareholders meetings to approve the Scheme of Arrangement and other matters in connection with the Redomestication are conducted in accordance with the Irish High Court’s order and that the shareholders approve the Scheme of Arrangement by the majority required by the Irish Companies Act of 2014, we are not aware of any reason why the Irish High Court would not sanction the Scheme of Arrangement. Nevertheless, the Irish High Court’s sanction is a matter for its discretion and there can be no assurance if or when such sanction will be obtained.

If the Irish High Court does not sanction the Scheme of Arrangement, XL-Ireland will be unable to effect the Redomestication as contemplated under the Scheme of Arrangement (even if the requisite shareholders have approved the Scheme of Arrangement). In addition, the Irish High Court may impose such conditions, modifications or amendments as it deems appropriate in relation to the Scheme of Arrangement, but may not impose any material changes without the joint consent of XL-Ireland and XL-Bermuda. If such conditions, modifications or amendments are imposed, the Company will be unable to effect the Redomesticaiton without amending the Scheme of Arrangement, which, depending on the nature of such conditions, modifications or amendments, might require new shareholder approvals. In addition, it is likely that the Company may determine to terminate the Scheme of Arrangement and not proceed with the Redomestication if any condition, modification or amendment is imposed on us that is adverse to the Company.

The market for the XL-Bermuda common shares may differ from the market for the XL-Ireland ordinary shares.

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Following the Redomestication, we will continue to list XL-Bermuda common shares on the NYSE under the symbol "XL", the same trading symbol as the XL-Ireland ordinary shares. The market price, trading volume or volatility of the XL-Bermuda common shares could be different from those of the XL-Ireland ordinary shares.

XL-Bermuda may become subject to taxes in Bermuda after March 31, 2035, which may have a material adverse effect on its financial condition.

Bermuda currently does not impose profits taxes, income taxes, capital gains taxes or any tax of the nature of estate or inheritance taxes. The Bermuda Minister of Finance, under the Exempted Undertakings Tax Protection Act 1966, as amended, of Bermuda, has provided XL-Bermuda an assurance that if any legislation is enacted in Bermuda that would “impose tax computed on profits or income or computed on any capital asset, gain or appreciation, or any tax in the nature of estate duty or inheritance tax, then the imposition” of any such tax will not be applicable to XL-Bermuda or any of its respective operations, shares, debentures or other obligations until March 31, 2035. It is possible that after March 31, 2035 XL-Bermuda may become subject to Bermuda taxes of the nature described above if Bermuda changes its tax laws as described in the prior sentence.

The Redomestication may not allow us to maintain a competitive worldwide effective corporate tax rate.

We believe the Redomestication should permit us to maintain a competitive worldwide effective tax rate. However, we cannot provide any assurance as to what our worldwide effective tax rate will be after the Redomestication because of, among other things, uncertainty regarding the amount of business activities in any particular jurisdiction in the future and the tax laws of such jurisdictions. Our actual worldwide effective tax rate may vary from our expectation and that variation may be material.

If Bermuda does not maintain Solvency II equivalence in the future, the Company could face other regulation that would be adverse to its business.

Although the Solvency II equivalence determination for Bermuda (and other third countries) has been granted for an "indefinite period", Solvency II provides that equivalence for third countries should be regularly reviewed to take into account any changes to the prudential or solvency regime. It is therefore possible that in the future a determination could be made that Bermuda’s insurance supervisory regime is no longer equivalent to Solvency II. In such event, European Union supervisors may conduct group supervision in respect of the Company or utilize (currently unspecified) “other methods” to achieve the aims of group supervision. These methods may include requiring the Company to form a European Union subgroup under a new European Union domiciled holding company over which supervision would be exercised by a European supervisor, possibly accompanied by additional supervisory measures. This supervision or any group supervision conducted, or alternative measures utilized by European Union supervisors may apply in addition to Bermuda’s group supervision regime and could impose restrictions and requirements on the Company that could be material and adverse to the Company’s business and operations.

The Redomestication will result in additional direct and indirect costs, even if it is not consummated.

We will incur additional costs and expenses in connection with and as a result of the Redomestication. These costs and expenses include professional fees to comply with Bermuda corporate laws and financial reporting requirements, as well as any additional costs we may incur going forward as a result of our new corporate structure. In addition, we have incurred and expect to incur further legal, accounting, filing and possible other fees and mailing, financial printing and other expenses in connection with the Redomestication, even if the Scheme of Arrangement is not approved by the shareholders or the Redomestication is not consummated.

We may choose to abandon or defer the Redomestication.

The Redomestication may be abandoned, at any time or for any reason prior to the sanctioning of the Scheme of Arrangement by the Irish High Court, by action of the Board of Directors of XL-Ireland. While we currently expect the effective time of the Scheme of Arrangement to take place soon after the sanctioning of the Scheme of Arrangement by the Irish High Court, the effective time of the Scheme of Arrangement will not occur until the Irish Registrar of Companies has registered an order of the Irish High Court approving the Scheme of Arrangement. In addition the Board of Directors may defer the application to the Irish High Court to approve the Scheme of Arrangement, and thus the Redomestication for economic, strategic or other reasons, including if adverse conditions are imposed on the Scheme of Arrangement by the Irish High Court. It is likely that the Company may determine to terminate the Scheme of Arrangement and not proceed with the Redomestication if any condition, modification or amendment is imposed on us that is adverse to the Company.

The enforcement of judgments in shareholder suits against XL-Bermuda may be more difficult.

XL-Bermuda is a Bermuda company. XL-Bermuda has been advised by its Bermuda counsel, ASW Law Limited, that a judgment for the payment of money rendered by a court in the U.S. based on civil liability would not be automatically

80

enforceable in Bermuda. XL-Bermuda has also been advised by ASW Law Limited that with respect to a final and conclusive judgment obtained in a court of competent jurisdiction in the U.S. under which a sum of money is payable (other than a sum of money payable in respect of multiple damages, taxes or other charges of a like nature or in respect of a fine or other penalty), a Bermuda court would be expected to enforce a judgment based thereon, provided that (a) such courts had proper jurisdiction over the parties subject to such judgment, (b) such courts did not contravene the rules of natural justice of Bermuda, (c) such judgment was not obtained by fraud, (d) the enforcement of the judgment would not be contrary to the public policy of Bermuda, (e) no new admissible evidence relevant to the action is submitted prior to the rendering of the judgment by the courts of Bermuda and (f) there is due compliance with the correct procedures under the laws of Bermuda. As a result, it may be difficult for a shareholder to effect service of process within the U.S. or to enforce judgments obtained against XL-Bermuda in U.S. courts. A Bermuda court may impose civil liability on XL-Bermuda or its directors or officers in a suit brought in the Supreme Court of Bermuda against XL-Bermuda or such persons with respect to a violation of U.S. federal securities laws, provided that the facts surrounding such violation would constitute or give rise to a cause of action under Bermuda law.

ITEM 2. UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS

Purchases of Equity Securities by the Issuer and Affiliate Purchasers

The following table provides information about purchases by the Company during the three months ended March 31, 2016 of its ordinary shares:

	Total Number of Shares Purchased(1)	Average Price Paid per Share		Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs	Approximate Dollar Value of Shares that May Yet Be Purchased Under the Plans or Programs (1) (2)
January 1, 2015 to January 31, 2015	1,615,881	$	36.11	1,614,605	$	645.0	million
February 1, 2015 to February 28, 2015	1,698,099	$	34.69	1,680,663	$	586.7	million
March 1, 2015 to March 31, 2015	6,656,361	$	35.84	6,656,361	$	348.2	million
	9,970,341	$	35.69	9,951,629	$	348.2	million

____________

(1) Shares purchased in connection with the vesting of restricted shares granted under our restricted stock plan do not represent shares purchased as part of publicly announced plans or programs. All such purchases were made in connection with satisfying tax withholding obligations of those employees.

(2) For information regarding our share buyback activity see Part I, Item 2, "Management's Discussion and Analysis of Financial Condition and Results of Operations - Other Key Focuses of Management - Capital Management - Buybacks of Ordinary Shares," included herein.

ITEM 5. OTHER INFORMATION

Disclosure of Certain Activities Under Section 13(r) of the Securities Exchange Act of 1934

Section 13(r) of the Securities Exchange Act of 1934, as amended, requires an issuer to disclose in its annual or quarterly reports, as applicable, whether it or any of its affiliates knowingly engaged in certain activities with Iran or with individuals or entities that are subject to certain sanctions under U.S. law. Disclosure is required even where the activities, transactions or dealings are conducted outside of the United States in compliance with applicable law, and whether or not the activities are sanctionable under U.S. law.

Certain of the Company’s non-U.S. subsidiaries provide insurance to marine policyholders located outside of the U.S. or reinsurance coverage to non-U.S. insurers of marine risks as well as mutual associations of ship owners that provide their members with protection and liability coverage. As a result of the recent lifting of European sanctions on Iran, some of these marine policyholders have informed us that they have begun shipping, or will begin to ship, cargo to and from Iran, including transporting crude oil, petrochemicals and refined petroleum products. Because these non-U.S. subsidiaries insure or reinsure multiple voyages and fleets containing multiple ships, we are unable to attribute gross revenues and net profits from such marine policies to activities with Iran. As the activities of our insureds and reinsureds are permitted under applicable laws and regulations, the Company intends for its non-U.S. subsidiaries to continue providing such coverage to its insureds and reinsureds to the extent permitted by applicable law.

A non-U.S. subsidiary provides property insurance for building and contents and business interruption for one property in the United Kingdom, owned by Bank Saderat, an entity that appears on the Specially Designated Nationals and Blocked Persons list of the U.S. Treasury Department’s Office of Foreign Assets Control under Executive Order 13224. Coverage began on July 16, 2014. The insurance contract was entered into pursuant to a license issued by Her Majesty’s Treasury in the United Kingdom. The payments received by our non-U.S. subsidiary for this insurance contract from inception through March 31,

81

2016 are £72,960. There are no net profits attributable to this contract. As these activities are permitted pursuant to the license issued by Her Majesty’s Treasury, the subsidiary intends to continue providing property insurance in the United Kingdom to Bank Saderat in accordance with applicable law.

A non-U.S. subsidiary provides property insurance for building and contents for one property in the United Kingdom, owned by Melli Bank plc, a wholly owned subsidiary of Bank Melli Iran, which is an entity that has been identified as owned or controlled by the Government of Iran and appears on the List of Persons Identified as Blocked Solely Pursuant to Executive Order 13599. Coverage began on July 1, 2014. The insurance contract was entered into pursuant to a license issued by Her Majesty’s Treasury in the United Kingdom. The payments received by our non-U.S. subsidiary for the insurance contract from inception through March 31, 2016 are £37,650. There are no net profits attributable to this contract. As these activities are permitted pursuant to the license issued by Her Majesty’s Treasury, the subsidiary intends to continue providing property insurance in the United Kingdom to Melli Bank plc in accordance with applicable law.

ITEM 6.	EXHIBITS
The following exhibits are filed as exhibits to this Quarterly Report:
12*	Statements regarding computation of ratios
31*	Rule 13a-14(a)/15d-14(a) Certifications
32*	Section 1350 Certification
101.INS*	XBRL Instance Document
101.SCH*	XBRL Taxonomy Extension Schema Document
101.CAL*	XBRL Taxonomy Extension Calculation Linkbase Document
101.LAB*	XBRL Taxonomy Extension Label Linkbase Document
101.PRE*	XBRL Taxonomy Extension Presentation Linkbase Document
101.DEF*	XBRL Taxonomy Extension Definition Linkbase Document

* Filed herewith.

82

SIGNATURES

Pursuant to the requirements of the Securities and Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

Date:	May 6, 2016
		XL Group plc
		(Registrant)
		/s/ MICHAEL S. MCGAVICK
		Name: Michael S. McGavick
		Title: Chief Executive Officer and Director
		XL Group plc
Date:	May 6, 2016
		/s/ PETER R. PORRINO
		Name: Peter R. Porrino
		Title: Executive Vice President and Chief Financial Officer
		XL Group plc

83

EX-12

Exhibit 12

XL GROUP PLC

COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES AND RATIO OF EARNINGS TO COMBINED FIXED CHARGES AND PREFERENCE DIVIDENDS

	Three Months Ended
(U.S. dollars in thousands, except ratios)	2016		2015
Earnings:
Pre-tax income (loss) from continuing operations	$	97,252	$	39,892
Fixed charges	114,541		89,747
Distributed income of equity investees	40,622		24,570
Subtotal	$	252,415	$	154,209
Less: Non-controlling interests	3,679		1,957
Preference share dividends	57,464		35,433
Total earnings (loss)	$	191,272	$	116,819
Fixed charges:
Interest costs	$	41,613	$	41,481
Accretion of deposit liabilities	10,690		9,957
Rental expense at 30% (1)	4,774		2,876
Total fixed charges	$	57,077	$	54,314
Preference share dividends	57,464		35,433
Total fixed charges and preference dividends	$	114,541	$	89,747
Ratio of earnings to fixed charges	3.4		2.2
Ratio of earnings to combined fixed charges and preference dividends	1.7		1.3
Deficiency - fixed charges only	N/A		N/A
Deficiency - fixed charges and preference dividends	N/A		N/A

_______________

(1) 30% represents a reasonable approximation of the interest factor.

EX-31

Exhibit 31

Certification of Chief Executive Officer

XL Group plc

Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

(Chapter 98, Title 15 U.S.C. 7241)

I, Michael S. McGavick, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of XL Group plc;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Dated:	May 6, 2016
		/s/ MICHAEL S. MCGAVICK
		Michael S. McGavick
		Chief Executive Officer

Certification of Chief Financial Officer

XL Group plc

Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

(Chapter 98, Title 15 U.S.C. 7241)

I, Peter R. Porrino, certify that:

1. I have reviewed this Annual Report on Form 10-K of XL Group plc;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Dated:	May 6, 2016
		/s/ PETER R. PORRINO
		Peter R. Porrino
		Executive Vice President and
		Chief Financial Officer

EX-32

Exhibit 32

Certification Accompanying Form 10-Q of XL Group plc

Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

(Chapter 63, Title 18 U.S.C. 1350(a) and (b))

Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (Chapter 63, Title 18 U.S.C. 1350(a) and (b)), each of the undersigned hereby certifies that, to his knowledge, the Quarterly Report on Form 10-Q for the period ended March 31, 2016 of XL Group plc (the “Company”) fully complies with the requirements of Section 13(a) or Section 15(d) of the Securities Exchange Act of 1934 and that the information contained in such Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Dated:	May 6, 2016
/s/ MICHAEL S. MCGAVICK
Michael S. McGavick
Chief Executive Officer
XL Group plc
Dated:	May 6, 2016
/s/ PETER R. PORRINO
Peter R. Porrino
Executive Vice President and
Chief Financial Officer
XL Group plc

A signed original of this written statement required by Section 906, or other document authenticating, acknowledging, or otherwise adopting the signature that appears in typed form within the electronic version of this written statement required by Section 906, has been provided to XL Group plc and will be retained by XL Group plc and furnished to the Securities and Exchange Commission or its staff upon request.

XML

Document And Entity Information - shares	3 Months Ended
	Mar. 31, 2016	May. 03, 2016
Document and Entity Information [Abstract]
Entity Registrant Name	XL GROUP PLC
Entity Central Index Key	0000875159
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Mar. 31, 2016
Document Fiscal Year Focus	2016
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Common Stock, Shares Outstanding		284,669,984

XML

UNAUDITED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Investments:
Fixed maturities, at fair value (amortized cost: 2016 - $31,444,747; 2015 - $31,517,654)	$ 32,647,573	$ 32,257,589
Equity securities, at fair value (cost: 2016 - $831,543; 2015 - $834,079)	878,407	878,919
Short-term investments, at fair value (amortized cost: 2016 - $317,939; 2015 - $618,851)	317,304	617,390
Total investments available for sale	33,843,284	33,753,898
Fixed maturities, at fair value (amortized cost: 2016 - $1,367,908; 2015 - $1,263,609)	1,409,583	1,235,699
Short-term investments, at fair value (amortized cost: 2016 - $26,949; 2015 - $60,176)	26,959	60,330
Total investments, trading	1,436,542	1,296,029
Investments in affiliates	1,953,711	1,708,899
Other investments	1,453,890	1,433,057
Total investments	38,687,427	38,191,883
Cash and cash equivalents	2,820,897	3,256,236
Restricted cash	161,019	154,992
Accrued investment income	291,016	312,667
Deferred acquisition costs and value of business acquired	1,057,941	890,568
Ceded unearned premiums	2,255,664	1,821,793
Premiums receivable	6,041,000	4,712,493
Reinsurance balances receivable	469,009	418,666
Unpaid losses and loss expenses recoverable	5,374,604	5,262,706
Receivable from investments sold	65,471	231,158
Goodwill and other intangible assets	2,233,597	2,210,266
Deferred tax asset	245,927	282,311
Other assets	942,120	937,199
Total assets	60,645,692	58,682,938
Liabilities:
Unpaid losses and loss expenses	25,913,484	25,439,744
Deposit liabilities	1,170,595	1,168,376
Future policy benefit reserves	4,020,602	4,163,500
Funds withheld on GreyCastle life retrocession arrangements (net of future policy benefit reserves recoverable: 2016 - $3,574,716; 2015 - $3,719,131)	998,391	914,629
Unearned premiums	8,217,539	7,043,358
Notes payable and debt	2,653,895	2,644,970
Reinsurance balances payable	2,583,962	2,117,727
Payable for investments purchased	74,476	130,060
Deferred tax liability	105,589	120,651
Other liabilities	1,239,441	1,285,460
Total liabilities	$ 46,977,974	$ 45,028,475
Commitments and Contingencies
Shareholders' Equity:
Ordinary shares, 999,990,000 authorized, par value $0.01; issued and outstanding (2016 - 286,273,358; 2015 - 294,745,045)	$ 2,863	$ 2,947
Additional paid in capital	8,608,726	8,910,167
Accumulated other comprehensive income	1,094,557	686,616
Retained earnings	1,982,598	2,077,349
Shareholders' equity attributable to XL Group plc	11,688,744	11,677,079
Non-controlling interest in equity of consolidated subsidiaries	1,978,974	1,977,384
Total shareholders' equity	13,667,718	13,654,463
Total liabilities and shareholders' equity	$ 60,645,692	$ 58,682,938

XML

UNAUDITED CONSOLIDATED BALANCE SHEETS (Parentheticals) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Amortized cost of fixed maturities	$ 31,444,747	$ 31,517,654
Cost of equity securities	831,543	834,079
Amortized cost of short-term investments, available for sale	317,939	618,851
Amortized cost of fixed maturities, trading	1,367,908	1,263,609
Amortized cost of short-term investments, trading	26,949	60,176
Future policy benefit reserves recoverable	$ 3,574,716	$ 3,719,131
Ordinary shares, shares authorized (in shares)	999,990,000	999,990,000
Ordinary shares, par value (in dollars per share)	$ 0.01	$ 0.01
Ordinary shares, shares issued (in shares)	286,273,358	294,745,045
Ordinary shares, shares outstanding (in shares)	286,273,358	294,745,045

XML

UNAUDITED CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2016		Mar. 31, 2015
Revenues:
Net premiums earned	$ 2,354,610		$ 1,334,000
Net investment income	205,886		208,513
Realized investment gains (losses):
Total net realized gains (losses) on investments, and net unrealized gains (losses) on investments, trading - Life Funds Withheld Assets	92,750		52,891
Net realized and unrealized gains (losses) on derivative instruments	(3,622)		16,521
Income (loss) from investment fund affiliates	(4,579)		35,329
Fee income and other	8,262		4,728
Total revenues	2,417,227		1,422,615
Expenses:
Net losses and loss expenses incurred	1,382,485		769,827
Claims and policy benefits	4,937		19,387
Acquisition costs	403,267	[1]	153,696
Operating expenses	515,381		325,656
Foreign exchange (gains) losses	(33,819)		27,390
Loss on sale of life reinsurance subsidiary			0
Interest expense	52,303		51,438
Total expenses	2,324,554		1,347,394
Income (loss) before income tax and income (loss) from operating affiliates	92,673		75,221
Income (loss) from operating affiliates	12,650		22,668
Provision (benefit) for income tax	22,295		24,218
Net income (loss)	83,028		73,671
Non-controlling interests	61,143		37,390
Net income (loss) attributable to ordinary shareholders	$ 21,885		$ 36,281
Weighted average ordinary shares outstanding - basic (in thousands of shares)	291,969		255,724
Weighted average ordinary shares outstanding - diluted (in thousands of shares)	296,666		260,704
Earnings (loss) per ordinary share and ordinary share equivalent - basic (in dollars per share)	$ 0.07		$ 0.14
Earnings (loss) per ordinary share and ordinary share equivalent - diluted (in dollars per share)	$ 0.07		$ 0.14
Excluding Life Funds Withheld Assets
Revenues:
Net investment income	$ 164,326		$ 158,094
Realized investment gains (losses):
Net realized gains (losses) on investments sold	11,164		15,178
Other-than-temporary impairments on investments	(19,582)		(10,515)
Other-than-temporary impairments on investments transferred to (from) other comprehensive income	2		(61)
Life Funds Withheld Assets
Revenues:
Net investment income	41,560		50,419
Realized investment gains (losses):
Net realized gains (losses) on investments sold	34,416		52,738
Other-than-temporary impairments on investments	(2,346)		(5,209)
Net unrealized gains (losses) on investments, trading securities	69,096		760
Net realized and unrealized gains (losses) on derivative instruments	$ (236,080)		$ (229,367)

[1] The Company has reflected the amortization of certain fair value adjustments recorded in conjunction with the Catlin Acquisition within the respective segments.

XML

UNAUDITED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Net income (loss) attributable to ordinary shareholders	$ 21,885	$ 36,281
Change in adjustments related to future policy benefit reserves, net of tax	17,035	60,356
Change in net unrealized gains (losses) on affiliate and other investments, net of tax	(9,707)	15,865
Change In Otti Losses Recognized In Other Comprehensive Income Net Of Tax	2,267	9,858
Change in underfunded pension liability, net of tax	(1,049)	975
Change in value of cash flow hedge	(39)	95
Foreign currency translation adjustments, net of tax	(16,439)	36,103
Comprehensive income (loss)	429,826	256,993
Excluding Life Funds Withheld Assets
Change in net unrealized gains (losses) on investments, net of tax	363,883	60,345
Life Funds Withheld Assets
Change in net unrealized gains (losses) on investments, net of tax	$ 51,990	$ 37,115

XML

UNAUDITED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Excluding Life Funds Withheld Assets	Life Funds Withheld Assets	Ordinary Shares	Additional Paid in Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss) Excluding Life Funds Withheld Assets	Accumulated Other Comprehensive Income (Loss) Life Funds Withheld Assets	Retained Earnings (Deficit)	Non-controlling Interest in Equity of Consolidated Subsidiaries
Balance, beginning of year at Dec. 31, 2014				$ 2,552	$ 7,359,102	$ 1,484,458			$ 1,187,639	$ 1,402,015
Issuance of ordinary shares				15	6
Buybacks of ordinary shares				(1)	(1,573)				(393)
Exercise of stock options				1
Exercise of stock options					1,771
Share-based compensation expense					1,832				(6,746)
Change in net unrealized gains (losses) on investments, net of tax		$ 60,345	$ 37,115				$ 60,345	$ 37,115
Change in adjustments related to future policy benefit reserves, net of tax	$ 60,356					60,356
Change in net unrealized gains (losses) on affiliate and other investments, net of tax	15,865					15,865
Change In Otti Losses Recognized In Other Comprehensive Income Net Of Tax	9,858					9,858
Change in underfunded pension liability, net of tax	975					975
Change in value of cash flow hedge	95					95
Foreign currency translation adjustments, net of tax	36,103					36,103
Net income (loss) attributable to ordinary shareholders	36,281								36,281
Dividends on ordinary shares									(41,599)
Non-controlling interests - contributions										2,569
Non-controlling interests - distributions										(4,175)
Non-controlling interests										1,957
Non-controlling interest share in change in accumulated other comprehensive income (loss)										0
Balance, end of year at Mar. 31, 2015	11,646,423			2,567	7,361,138	1,705,170			1,175,182	1,402,366
Balance, beginning of year at Dec. 31, 2015	13,654,463			2,947	8,910,167	686,616			2,077,349	1,977,384
Issuance of ordinary shares				15	7
Buybacks of ordinary shares				(99)	(301,354)				(54,447)
Exercise of stock options				0
Exercise of stock options					490
Share-based compensation expense					(584)				(3,475)
Change in net unrealized gains (losses) on investments, net of tax		$ 363,883	$ 51,990				$ 363,883	$ 51,990
Change in adjustments related to future policy benefit reserves, net of tax	17,035					17,035
Change in net unrealized gains (losses) on affiliate and other investments, net of tax	(9,707)					(9,707)
Change In Otti Losses Recognized In Other Comprehensive Income Net Of Tax	2,267					2,267
Change in underfunded pension liability, net of tax	(1,049)					(1,049)
Change in value of cash flow hedge	(39)					(39)
Foreign currency translation adjustments, net of tax	(16,439)					(16,439)
Net income (loss) attributable to ordinary shareholders	21,885								21,885
Dividends on ordinary shares									(58,714)
Non-controlling interests - contributions										882
Non-controlling interests - distributions										(3,030)
Non-controlling interests										3,679
Non-controlling interest share in change in accumulated other comprehensive income (loss)										59
Balance, end of year at Mar. 31, 2016	$ 13,667,718			$ 2,863	$ 8,608,726	$ 1,094,557			$ 1,982,598	$ 1,978,974

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UNAUDITED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Cash flows provided by (used in) operating activities:
Net income (loss)	$ 83,028	$ 73,671
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Total net realized (gains) losses on investments and net unrealized (gains) losses on investments, Trading - Life Funds Withheld Assets	(92,750)	(52,891)
Net realized and unrealized (gains) losses on derivative instruments	3,622	(16,521)
Amortization of premiums (discounts) on fixed maturities	47,505	35,998
(Income) loss from investment and operating affiliates	19,797	(45,467)
Share-based compensation	20,707	18,295
Depreciation and amortization	22,592	10,907
Accretion of deposit liabilities	12,055	10,044
Changes in:
Unpaid losses and loss expenses	330,160	77,832
Future policy benefit reserves	(59,858)	(49,279)
Funds withheld on GreyCastle life retrocession arrangements, net	(121,272)	(169,569)
Unearned premiums	1,148,149	655,733
Premiums receivable	(1,322,085)	(517,881)
Unpaid losses and loss expenses recoverable	(82,729)	(148,962)
Ceded unearned premiums	(436,332)	(146,049)
Reinsurance balances receivable	(49,781)	10,057
Deferred acquisition costs and value of business acquired	(156,373)	(72,340)
Reinsurance balances payable	460,982	84,261
Deferred tax asset - net	(7,945)	14,119
Derivatives	17,863	141,754
Other assets	(47,084)	(31,407)
Other liabilities	(155,826)	(94,545)
Other	(41,618)	17,851
Total adjustments	(254,141)	(38,693)
Net cash provided by (used in) operating activities	(171,113)	34,978
Cash flows provided by (used in) investing activities:
Proceeds from sale of fixed maturities and short-term investments	3,772,077	1,473,941
Proceeds from redemption of fixed maturities and short-term investments	949,221	1,053,739
Proceeds from sale of equity securities	62,895	189,473
Purchases of fixed maturities and short term investments	(4,325,679)	(2,835,304)
Purchases of equity securities	(55,411)	(94,141)
Proceeds from sale of affiliates	41,538	77,916
Purchases of affiliates	(247,049)	(29,037)
Purchase of Allied International Holdings, Inc., net of cash acquired	(69,745)	0
Change in restricted cash	(6,027)	0
Other, net	82,141	(32,141)
Net cash provided by (used in) investing activities	203,961	(195,554)
Cash flows provided by (used in) financing activities:
Proceeds from issuance of ordinary shares and exercise of stock options	491	1,772
Buybacks of ordinary shares	(355,901)	(1,966)
Dividends paid on ordinary shares	(57,861)	(40,922)
Distributions to non-controlling interests	(27,857)	(7,172)
Contributions from non-controlling interests	883	2,569
Proceeds from the issuance of debt	0	980,600
Deposit liabilities	(8,546)	(38,788)
Net cash provided by (used in) financing activities	(448,791)	896,093
Effects of exchange rate changes on foreign currency cash	(19,396)	(47,397)
Increase (decrease) in cash and cash equivalents	(435,339)	688,120
Cash and cash equivalents beginning of year	3,256,236	2,521,814
Cash and cash equivalents end of year	2,820,897	3,209,934
Life Funds Withheld Assets
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Net realized and unrealized (gains) losses on derivative instruments	$ 236,080	$ 229,367

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Basis of Preparation and Consolidation

3 Months Ended

Mar. 31, 2016

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Basis of Preparation and Consolidation

Basis of Preparation and Consolidation

Unless the context otherwise indicates, references herein to the "Company" include XL Group plc, an Irish public limited company ("XL-Ireland"), and its consolidated subsidiaries.

These unaudited consolidated financial statements include the accounts of the Company and have been prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP") for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and disclosures required by GAAP for complete financial statements. In addition, the year-end balance sheet data was derived from audited financial statements but do not include all disclosures required by GAAP. In the opinion of management, these unaudited financial statements reflect all adjustments considered necessary for a fair statement of financial position and results of operations at the end of and for the periods presented. The results of operations for any interim period are not necessarily indicative of the results for a full year. All inter-company accounts and transactions have been eliminated. The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure about contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ materially from these estimates. For further information, see Item 8, Note 2(a), "Significant Accounting Policies - Basis of Preparation and Consolidation," to the Consolidated Financial Statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2015.

On February 29, 2016, the Company announced a proposal to change the parent holding company's place of incorporation to Bermuda from Ireland. To effect the redomestication, XL Group Ltd, a wholly-owned subsidiary of XL-Ireland and a Bermuda exempted company ("XL-Bermuda"), would replace XL-Ireland as the ultimate holding company of the XL group of companies, and XL-Ireland's ordinary shareholders would receive one common share of XL-Bermuda in exchange for each ordinary share of XL-Ireland held by them. The Company expects to submit the proposal for redomestication, along with related proposals, to its shareholders in the next several months and complete the transaction in the third quarter of 2016. The proposed redomestication will be subject to approval by the Company's ordinary shareholders and sanctioning by the High Court of Ireland. In addition, the proposed redomestication could be abandoned by the Company prior to its completion for any reason, including if any necessary regulatory approvals are not obtained. XL-Bermuda will continue to be registered with the U.S. Securities and Exchange Commission (the "SEC") and be subject to SEC reporting requirements applicable to domestic registrants. Further, if approved, XL-Bermuda will be subject to the applicable corporate governance rules of the New York Stock Exchange ("NYSE"), and will report its financial results in U.S. dollars and under U.S. generally accepted accounting principles, in addition to any reporting requirements under Bermuda law. XL-Bermuda's shares will continue to trade on the NYSE under the ticker symbol "XL". The Company does not expect the redomestication to have a material impact on the Company's financial condition, results of operations, including its global effective tax rate, or cash flows. If, and only if, the proposed redomestication is consummated, XL-Ireland will be liquidated and following the effectiveness of such liquidation, XL-Ireland's direct, wholly-owned subsidiary XLIT Ltd ("XL-Cayman"). will become a direct, wholly-owned subsidiary of XL-Bermuda. If the proposed redomestication is consummated the liquidation of XL-Ireland is expected to occur at the end of 2016 or beginning of 2017.

On May 1, 2015, the Company completed its acquisition of Catlin Group Limited and its consolidated subsidiaries ("Catlin"). Catlin, through its wholly-owned subsidiaries, provided property, casualty and specialty insurance and reinsurance coverage on a worldwide basis. The Company's consolidated results of operations include those of Catlin from May 1, 2015. For further information, see Item 8, Note 3(c), "Acquisitions and Disposals - Catlin Acquisition," to the Consolidated Financial Statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2015.

In May 2014, the Company ceded the majority of its life reinsurance business to GreyCastle Life Reinsurance ("GCLR") via 100% quota share reinsurance (the "GreyCastle Life Retro Arrangements"). Under the terms of the transaction, the Company continues to own, on a funds withheld basis, assets supporting the GreyCastle Life Retro Arrangements consisting of cash, fixed maturity securities and accrued interest (the "Life Funds Withheld Assets"). The Life Funds Withheld Assets are managed pursuant to agreed investment guidelines that meet the contractual commitments of the XL ceding companies and applicable laws and regulations. All of the investment results associated with the Life Funds Withheld Assets ultimately accrue to GCLR. Because the Company no longer shares in the risks and rewards of the underlying performance of the supporting invested assets, disclosures within the financial statement notes included herein separate the Life Funds Withheld Assets from the rest of the Company's investments. For further information, see Item 8, Note 3(e), "Acquisitions and Disposals - Sale of Life Reinsurance Subsidiary," to the Consolidated Financial Statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2015.

To facilitate period-to-period comparisons, certain reclassifications have been made to prior period consolidated financial statement amounts to conform to current period presentation.

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Significant Accounting Policies

3 Months Ended

Mar. 31, 2016

Accounting Policies [Abstract]

Significant Accounting Policies

Significant Accounting Policies

(a) Recent Accounting Pronouncements

In January 2016, the Financial Accounting Standards Board ("FASB") issued an accounting standards update concerning the accounting for financial instruments. The guidance retains the basic existing framework for accounting for financial instruments under GAAP, while achieving limited convergence with IFRS in this area. The guidance: (1) requires equity investments (except consolidated entities and those accounted for under the equity method of accounting) to be measured at fair value with changes in fair value recognized in net income, although equity instruments without a readily determinable fair value may be measured at cost less impairment with an adjustment for observable price changes; (2) simplifies the impairment assessment of equity investments without readily determinable fair values by requiring a qualitative assessment to identify impairment; (3) eliminates the requirement to disclose the fair value of financial instruments measured at amortized cost for non-public business entities; (4) eliminates the requirement to disclose the method(s) and significant assumptions used to estimate the fair value of financial instruments measured at amortized cost on the balance sheet; (5) requires public business entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes; (6) requires an entity to present separately in other comprehensive income the portion of the total change in the fair value of a liability resulting from a change in the instrument-specific credit risk when the entity has elected to measure the liability at fair value in accordance with the fair value option for financial statements; (7) requires separate presentation of financial assets and financial liabilities by measurement category and form of asset in the financial statements; and (8) clarifies that an entity should evaluate the need for a valuation allowance on a deferred tax asset related to available for sale securities in combination with the entity's other deferred tax assets. The guidance will be effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. Early adoption is permitted only for the amendment relating to presentation of the change in the fair value of a liability resulting from a change in instrument-specific credit risk and should be applied as of the beginning of the fiscal year of adoption. All of the amendments from this update should be applied by means of a cumulative effect adjustment to the balance sheet as of the beginning of the fiscal year of adoption, except the amendments related to impairment of equity securities without readily determinable fair values. The Company is currently evaluating the impact of this guidance, but expects that it will have an effect on results of operations as mark to market movements will prospectively impact net income. The Company does not expect this new guidance to have a material impact on the Company's financial condition or cash flows.

In February 2016, the FASB issued an accounting standards update concerning the accounting for leases. The most significant change to existing GAAP created by this standard will be the lessee recognition of lease assets and lease liabilities for those leases classified as operating. The core principle of this guidance stipulates that a lessee should recognize in the statement of financial position, initially measured at the present value of the lease payments, both a liability for contractual payments due under the lease, and an asset representing its right to use the underlying leased asset for the lease term ("right-of-use asset"). For financing leases, interest on the lease liability should be recognized separately from the amortization of the right-of-use asset in the statement of comprehensive income. Additionally, as regards the presentation of financing lease activities within the statement of cash flows, repayments of the principal portion of the lease liability should be classified within financing activities, while payments of interest on the lease liability should be classified within operating activities. For operating leases, a single net lease cost should be recognized over the lease term, generally on a straight-line basis, and all cash payments related to the lease should be classified within operating activities in the statement of cash flows. For leases with a term of 12 months or less, a lessee is permitted to make an accounting policy election by class of underlying asset not to recognize lease assets and lease liabilities, and therefore recognize lease expense for such leases on a straight-line basis over the lease term. The guidance will be effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early adoption is permitted. In transition, lessees and lessors are required to recognize and measure leases at the beginning of the earliest period presented using a modified retrospective approach, which includes a number of optional practical expedients that entities may elect to apply. An entity that elects to apply the practical expedients will substantively continue to account for leases that commence before the effective date in accordance with existing GAAP, except that a right-of-use asset and a lease liability must be recorded for all operating leases at each reporting date based on the present value of the remaining minimum rental payments that were previously tracked and disclosed. The Company is currently evaluating the impact of this guidance, but expects that it will have an effect on the Company's financial condition as new assets and liabilities related to operating leases are likely to be recorded as a result of adoption. The Company does not expect this new guidance to have a material impact on the Company's results of operations or cash flows.

In March 2016, the FASB issued an accounting standards update concerning the accounting for equity method investments. The amendments in this update require that when an investment qualifies for use of the equity method as a result of an increase in the level of ownership interest or degree of influence, the equity method investor add the cost of acquiring the additional interest in the investee to the current basis of the investor's previously held interest and adopt the equity method of accounting as of that date. Additionally, if the investment was previously accounted for as an available-for sale security, an entity also shall immediately recognize through earnings the unrealized holding gain or loss in accumulated other comprehensive income (“AOCI”) as of that date. Thus, this new treatment is eliminating existing GAAP rules requiring retroactive adjustment of an entity’s investments, results of operations and retained earnings when an existing investment qualifies for the equity method of accounting. The guidance will be effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2016, and should be applied prospectively upon their effective date. Early adoption is permitted. The Company is currently evaluating the impact of this guidance, but does not expect this new guidance to have a material impact on the Company's financial condition, results of operations or cash flows.

In March 2016 as part of its simplification initiative, the FASB issued an accounting standards update concerning the accounting for several aspects of employee share-based payment awards including: income tax consequences, classification of awards as either equity or liabilities, classification of items in the statement of cash flows, and certain expedients that entities can now elect regarding estimates and assumptions in this area. Regarding the accounting for income taxes, all excess tax benefits and tax deficiencies, including tax benefits of dividends on share-based payment awards, should be recognized as income tax expense or benefit (regardless of whether the benefit reduces taxes payable in the current period) in the income statement, as opposed to additional paid-in capital as current GAAP prescribes. The tax effects of exercised or vested awards should be treated as discrete items in the reporting period in which they occur. Regarding the classification of awards, the update changes the threshold to qualify for equity classification from the employer's minimum statutory withholding requirements to the maximum statutory tax rates in the applicable jurisdictions. Regarding the classification of cash flows, excess tax benefits should be classified along with other income tax cash flows as an operating activity, while cash paid by an employer when directly withholding shares for tax-withholding purposes should be classified as a financing activity. As regards new expedients which can be elected related to estimates and assumptions in this area of accounting, the only one allowable for public business entities is that they may now make an entity-wide accounting policy election to either estimate the number of share-based payment awards that are expected to vest (which is current GAAP) or account for forfeitures as they occur. The guidance will be effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2016 with early adoption permitted so long as all the amendments in the update are adopted in the same period. The amendments within the guidance related to the recognition of excess tax benefits and tax deficiencies in the income statement as opposed to in paid-in capital should be applied prospectively. The amendments related to the statement of cash flows presentation of excess tax benefits may be adopted either prospectively or retrospectively, while the amendments related to the presentation of employee taxes paid must be applied retrospectively. The remaining amendments - relating to the timing of when excess tax benefits are recognized, the change in the threshold for equity versus liability classification of certain awards, and the allowable policy election regarding forfeitures - should be applied using a modified retrospective transition method by means of a cumulative-effect adjustment to equity as of the beginning of the period in which the guidance is adopted. The Company is currently evaluating the impact of this guidance, but expects it will have an impact on the Company's financial position, results of operations and cash flows upon adoption.

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Acquisition and Disposals

3 Months Ended

Mar. 31, 2016

Business Combinations [Abstract]

Acquisition and Disposals

Acquisitions and Disposals

(a)    Allied Acquisition

Overview

On February 1, 2016, the Company announced that its indirect, wholly-owned subsidiary, XL Reinsurance America Inc. ("XLRA"), completed the acquisition ("Allied Acquisition") of Allied International Holdings, Inc. ("Allied"). Allied is the holding company of Allied Specialty Insurance, Inc. and T.H.E. Insurance Company, a leading insurer of the outdoor entertainment industry in the U.S.

Acquisition Consideration

The Company made an initial payment of $75.6 million to acquire Allied. Additional contingent consideration then will be paid based on production and underwriting profitability over a three year period subsequent to the acquisition date. The target payments of contingent consideration range from $7.5 million to $30.0 million. The Company currently believes the fair market value of these payments to be $15.0 million, resulting in total consideration of $90.6 million recorded for the acquisition.

Fair Value of Net Assets Acquired and Liabilities Assumed

The purchase price was allocated to the acquired assets and assumed liabilities of Allied based on estimated fair values on the acquisition date. The fair value of the net assets acquired and liabilities assumed was $76.7 million, which includes indefinite-lived intangible assets of $8.0 million and other intangible assets of $6.0 million, which will be amortized over their estimated useful lives. Other adjustments to the historical carrying value of acquired assets and liabilities included: estimating the fair value of net loss and loss expense reserves at the present value of expected net loss and loss adjustment expense payments plus a risk premium, estimating the value of the business acquired at the present value of expected underwriting profits with net unearned premiums plus a risk margin less policy servicing costs, and estimating the fair value of real estate assets at appraised market values. In conjunction with the transaction, the Company recognized goodwill of $13.9 million which is primarily attributable to the acquiree's underwriting expertise in a niche specialty risk business. The Company has allocated all of the $13.9 million of goodwill to its Insurance segment. See Note 8, "Goodwill and Other Intangible Assets," for further information.

The allocation of the purchase price is based on information that was available to management at the time the consolidated financial statements were prepared. The allocation may change as additional information becomes available within the measurement period, which cannot exceed 12 months from the Acquisition Date. The fair value recorded for these items may be subject to adjustments, which may impact the individual amounts recorded for assets acquired and liabilities assumed, as well as the residual goodwill.

(b)     New Energy Risk

On July 24, 2015, the Company purchased an additional 63.63% interest in New Energy Risk Inc. ("New Energy"), a provider of insurance risk management solutions within the alternative energy sector. A substantial portion of the additional shares were purchased directly from the family trusts of a Company employee who is responsible for managing the business generated by New Energy. Prior to the additional purchase, the Company held a 31.16% ownership interest in New Energy, which was accounted for as an equity method investment. The subsequent purchase raised the Company's ownership stake to 94.79%, which is deemed a controlling financial interest, and hence, the Company now consolidates New Energy. Subsequent to the additional purchase, the family trusts of the employee contributed their remaining 5.21% ownership interest in New Energy to XL Innovate Fund, LP ("XL Innovate Fund"), the entity that holds the Company's New Energy shares, in partial satisfaction of the employee's aggregate 5.21% investment commitment to the Fund. See Note 11, "Related Party Transactions," for further details of these transactions.

The Company paid approximately $8.8 million to acquire the additional interest in New Energy, and realized a gain of approximately $2.5 million, included within income from operating affiliates, in order to reflect the appropriate fair value adjustment to its existing investment previously accounted for under the equity method. The assets and liabilities of New Energy are now reflected in the consolidated financial statements of the Company based on their fair value as of the acquisition date, while Goodwill of approximately $13.4 million was recorded in conjunction with the transaction. See Note 8, "Goodwill and Other Intangible Assets," for a further discussion of the goodwill recorded in conjunction with the acquisition.

(c)    Catlin Acquisition

Overview

On May 1, 2015 (the "Acquisition Date"), the Company completed its acquisition (the "Catlin Acquisition") of the entire issued share capital of Catlin Group Limited ("Catlin") for approximately $4.1 billion. For further information, see Item 8, Note 3(c), "Acquisitions and Disposals - Catlin Acquisition," to the Consolidated Financial Statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2015.

Pursuant to the terms of the Implementation Agreement, XL-Ireland acquired each ordinary share of Catlin, par value $0.01 per share ("Catlin Shares"), for consideration per Catlin Share (the "Acquisition Consideration") equal to 388 pence in cash and 0.130 of an XL-Ireland ordinary share, par value $0.01 per share ("XL Shares"), subject to the mix and match facility set forth in the Implementation Agreement. The newly-issued XL Shares are listed on the New York Stock Exchange. The XL Shares issued in connection with the Catlin Acquisition were issued in reliance upon the exemption from registration under the U.S. Securities Act of 1933, as amended (the "Securities Act"), provided by Section 3(a)(10) of the Securities Act.

XL-Ireland issued approximately 49.9 million XL Shares and paid approximately £1.49 billion in cash to the holders of Catlin Shares as Acquisition Consideration pursuant to the terms of the Scheme.

Fair Value of Net Assets Acquired and Liabilities Assumed

The purchase price was allocated to the acquired assets and assumed liabilities of Catlin based on estimated fair values on the Acquisition Date. The Company recognized goodwill of $794.0 million which is primarily attributable to the synergies and economies of scale expected to result upon integration of Catlin into the Company's operations, including further diversification in geographic mix and product offerings and an increase in distribution strength. The Company has allocated $466.1 million of this goodwill to its Insurance segment and $327.9 million to its Reinsurance segment. The Company also recognized indefinite lived intangible assets of $673.0 million and other intangible assets of $315.0 million, which will be amortized over their estimated useful lives. See Note 8, "Goodwill and Other Intangible Assets," for further information.

The allocation of the purchase price is based on information that was available to management at the time the consolidated financial statements were prepared. The allocation may change as additional information becomes available within the measurement period, which cannot exceed 12 months from the Acquisition Date. The fair value recorded for these items may be subject to adjustments, which may impact the individual amounts recorded for assets acquired and liabilities assumed, as well as the residual goodwill.

As part of the purchase price allocation, the Company adjusted the historical carrying value of the acquired assets and liabilities based on estimated fair values at the Acquisition Date. An explanation of the significant adjustments for fair value that are being amortized to net income is as follows:

• Deferred acquisition costs and value of business acquired - The adjustment consists of two components. The first adjustment is the elimination of Catlin's deferred acquisition costs asset. The second adjustment is the establishment of the value of business acquired asset, which represents the present value of the expected underwriting profit within the unearned premiums liability, net of reinsurance, less costs to service the related policies and a risk premium. This adjustment will be amortized to underwriting, acquisition and insurance expenses over approximately two years, as the contracts for business in-force as of the Acquisition Date expire. The Company has included $59.6 million in acquisition expenses related to the amortization of the value of business acquired during the three months ended March 31, 2016.

• Unpaid losses and loss adjustment expenses - Unpaid losses and loss adjustment expenses acquired include an increase to adjust the carrying value of Catlin's historical unpaid losses and loss adjustment expenses, net of related reinsurance recoverable, to fair value as of the Acquisition Date. The estimated fair value consists of the present value of the expected net loss and loss adjustment expense payments plus a risk premium. This adjustment, plus the unamortized fair value adjustment included in Catlin's historical unpaid losses and loss adjustment expenses, will be amortized to losses and loss adjustment expenses over a weighted average period of approximately 20 years, based on the estimated payout pattern of net reserves as of the Acquisition Date.

Transaction-related Costs

As a part of the ongoing integration of Catlin's operations, the Company incurs costs associated with restructuring the systems, processes and workforce. These costs include such items as severance, retention, facilities and consulting and other costs. The Company separately identifies such costs and includes these expenses within Corporate and Other:

(U.S. dollars in thousands)	Severance related costs		Retention and other compensation costs		Facilities-related costs		Consulting and other		Total
Liabilities at December 31, 2015	$	16,127	$	16,969	$	818	$	23,375	$	57,289
Costs incurred in 2016	16,758		8,006		6,103		24,120		54,987
2016 payments	16,535		17,466		1,040		16,303		51,344
Liabilities at March 31, 2016	$	16,350	$	7,509	$	5,881	$	31,192	$	60,932

(d)    Sale of Strategic Operating Affiliate

On April 1, 2015, XL Re Ltd ("XL Re"), an indirect wholly-owned subsidiary of the Company, completed the previously announced sale of all of its shares in ARX Holding Corp. ("ARX") to The Progressive Corporation ("Progressive") pursuant to the terms of the Stock Purchase Agreement with Progressive. XL Re's shares in ARX represented approximately 40.6% of ARX's outstanding capital stock on a fully diluted basis at the time of the announcement. The carrying value of XL Re's shares in ARX was $220.2 million at the time of the sale.

XL Re received $560.6 million in proceeds from the transaction, which was based upon the consolidated tangible net book value of ARX and its subsidiaries as of December 31, 2014, and certain other factors. Thus, the Company recorded a gain of $340.4 million as a result of this transaction.

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Fair Value Measurements

3 Months Ended

Mar. 31, 2016

Fair Value Disclosures [Abstract]

Fair Value Measurements

Fair Value Measurements

Fair value is defined as the amount that would be received for the sale of an asset or paid to transfer a liability (an exit price), in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants as of the measurement date. Applicable accounting guidance provides an established hierarchy for inputs used in measuring fair value that maximizes the use of observable inputs and minimizes the use of unobservable inputs by requiring that the most observable inputs be used when available. Observable inputs are inputs that market participants would use in valuing the asset or liability and are developed based on market data obtained from sources independent of the Company. Unobservable inputs are inputs that reflect the Company’s assumptions about the factors that market participants would use in valuing the asset or liability. Assets and liabilities are classified based on the lowest level of input that is significant to the fair value measurements. The Company reviews the fair value hierarchy classification on a quarterly basis. Changes in the observability of valuation inputs may result in a reclassification of levels for certain securities within the fair value hierarchy.

The fair values for available for sale investments are generally sourced from third parties. The fair value of fixed income securities is based upon quoted market values where available, "evaluated bid" prices provided by third party pricing services ("pricing services") where quoted market values are not available, or by reference to broker quotes where pricing services do not provide coverage for a particular security. While the Company receives values for the majority of the investment securities it holds from pricing services, it is ultimately management’s responsibility to determine whether the values received and recorded in the financial statements are representative of appropriate fair value measurements.

The Company performs regular reviews of the prices received from our third party valuation sources to assess whether the prices represent a reasonable estimate of the fair value. This process is completed by investment and accounting personnel who are independent of those responsible for obtaining the valuations. The approaches taken by the Company include, but are not limited to, annual reviews of the controls of the external parties responsible for sourcing valuations that are subjected to automated tolerance checks, quarterly reviews of the valuation sources and dates, comparisons of executed sales prices to prior valuations, regular deep dives on a sample of securities across our major asset classes and monthly reconciliations between the valuations provided by external parties and valuations provided by third party investment managers at a portfolio level.

In addition, the Company assesses the effectiveness of valuation controls performed by external parties responsible for sourcing appropriate valuations from third parties on our behalf. The approaches taken by these external parties to gain comfort include, but are not limited to, comparing valuations between external sources, completing recurring reviews of third party pricing services' methodologies and reviewing controls of the third party service providers to support the completeness and accuracy of the prices received. Where broker quotes are the primary source of the valuations, sufficient information regarding the specific inputs utilized by the brokers is generally not available to support a Level 2 classification. The Company obtains the majority of broker quoted values from third party investment managers who perform independent verifications of these valuations using pricing matrices based upon information gathered by market traders. In addition, for the majority of these securities, the Company compares the broker quotes to independent valuations obtained from third party pricing vendors, which may also consist of broker quotes, to assess if the prices received represent reasonable estimates of the fair value.

For further information about the Company's fair value measurements, see Item 8, Note 2(b), "Significant Accounting Policies - Fair Value Measurements," and Item 8, Note 4, "Fair Value Measurements," to the Consolidated Financial Statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2015.

(a) Fair Value Summary

The following tables set forth the Company’s assets and liabilities that were accounted for at fair value as of March 31, 2016 and December 31, 2015 by level within the fair value hierarchy:

March 31, 2016 (U.S. dollars in thousands)	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Other Unobservable Inputs (Level 3)		Collateral and Counterparty Netting		Balance at March 31, 2016
Assets
Fixed maturities - Available for Sale ("AFS") - Excluding Life Funds Withheld Assets
U.S. Government and Government-Related/Supported ("U.S. Government")	$	—	$	4,532,047	$	44,940	$	—	$	4,576,987
Corporate - Financials	—		3,660,732		43,583		—		3,704,315
Corporate - Non Financials	—		7,091,329		181		—		7,091,510
Residential mortgage-backed securities – Agency ("RMBS - Agency")	—		4,364,154		2,853		—		4,367,007
Residential mortgage-backed securities – Non-Agency ("RMBS - Non-Agency")	—		302,843		—		—		302,843
Commercial mortgage-backed securities ("CMBS")	—		325,485		—		—		325,485
Collateralized debt obligations ("CDOs")	—		—		21,729		—		21,729
Other asset-backed securities (1)	—		1,158,698		4,200		—		1,162,898
U.S. States and political subdivisions of the States	—		2,584,747		—		—		2,584,747
Non-U.S. Sovereign Government, Provincial, Supranational and Government-Related/Supported ("Non-U.S. Governments")	—		5,546,695		—		—		5,546,695
Total fixed maturities - AFS - Excluding Funds Withheld Assets, at fair value	$	—	$	29,566,730	$	117,486	$	—	$	29,684,216
Equity securities, at fair value	532,672		345,735				—		878,407
Short-term investments, at fair value (1)	—		317,304		—		—		317,304
Total investments AFS - Excluding Funds Withheld Assets	$	532,672	$	30,229,769	$	117,486	$	—	$	30,879,927
Fixed maturities - Life Funds Withheld Assets
U.S. Government	$	—	$	12,692	$	—	$	—	$	12,692
Corporate - Financials	—		547,279		—		—		547,279
Corporate - Non Financials	—		1,269,262		—		—		1,269,262
RMBS – Agency	—		733		—		—		733
RMBS – Non-Agency	—		25,829		—		—		25,829
CMBS	—		108,914		—		—		108,914
Other asset-backed securities	—		121,721		—		—		121,721
Non-U.S. Governments	—		876,927		—		—		876,927
Total fixed maturities - AFS - Life Funds Withheld Assets, at fair value	$	—	$	2,963,357	$	—	$	—	$	2,963,357
Total investments - AFS, at fair value	$	532,672	$	33,193,126	$	117,486	$	—	$	33,843,284
Fixed maturities - Trading
U.S. Government	$	—	$	15,267	$	—	$	—	$	15,267
Corporate - Financials	—		382,755		—		—		382,755
Corporate - Non Financials	—		558,284		—		—		558,284
RMBS – Agency	—		1,869		—		—		1,869
CMBS	—		4,760		—		—		4,760
Other asset-backed securities	—		25,615		—		—		25,615
Non-U.S. Governments	—		421,033		—		—		421,033
Total fixed maturities - Trading, at fair value	$	—	$	1,409,583	$	—	$	—	$	1,409,583
Short-term investments, at fair value (1)	—		26,959		—		—		$	26,959
Total investments, Trading	$	—	$	1,436,542	$	—	$	—	$	1,436,542

March 31, 2016 (U.S. dollars in thousands)	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Other Unobservable Inputs (Level 3)		Collateral and Counterparty Netting			Balance at March 31, 2016
Cash equivalents (2)	295,962		881,157		—		—			1,177,119
Cash equivalents - Life Funds Withheld Assets (2)	—		92,444		—		—			92,444
Other investments (3)	—		1,011,336		301,095		—			1,312,431
Other assets (4)	—		56,118		20,486		(37,870		)	38,734
Total assets accounted for at fair value	$	828,634	$	36,670,723	$	439,067	$	(37,870	)	$	37,900,554
Liabilities
Funds withheld on GreyCastle life retrocession arrangements (net of future policy benefit reserves recoverable) (5)	$	—	$	681,811	$	—	$	—		$	681,811
Financial instruments sold, but not yet purchased (6)	2,180		—		—		—			2,180
Other liabilities (4)	—		58,350		30,338		(37,870		)	50,818
Total liabilities accounted for at fair value	$	2,180	$	740,161	$	30,338	$	(37,870	)	$	734,809

December 31, 2015 (U.S. dollars in thousands)	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Other Unobservable Inputs (Level 3)		Collateral and Counterparty Netting		Balance at December 31, 2015
Assets
Fixed maturities - AFS - Excluding Life Funds Withheld Assets
U.S. Government	$	—	$	5,020,574	$	45,063	$	—	$	5,065,637
Corporate - Financials	—		3,508,224		53,685		—		$	3,561,909
Corporate - Non Financials	—		6,900,259		188		—		$	6,900,447
RMBS - Agency	—		3,754,894		3,077		—		$	3,757,971
RMBS - Non-Agency	—		328,540		—		—		$	328,540
CMBS	—		405,316		—		—		$	405,316
CDOs	—		2		32,408		—		$	32,410
Other asset-backed securities	—		1,150,715		17,857		—		$	1,168,572
U.S. States and political subdivisions of the States	—		2,632,070		—		—		$	2,632,070
Non-U.S. Government	—		5,251,614		—		—		$	5,251,614
Total fixed maturities - AFS - Excluding Funds Withheld Assets, at fair value	$	—	$	28,952,208	$	152,278	$	—	$	29,104,486
Equity securities, at fair value	528,581		350,338		—		—		878,919
Short-term investments, at fair value (1)	—		617,390		—		—		617,390
Total investments AFS - Excluding Funds Withheld Assets	$	528,581	$	29,919,936	$	152,278	$	—	$	30,600,795
Fixed maturities - Life Funds Withheld Assets
U.S. Government	$	—	$	12,742	$	—	$	—	$	12,742
Corporate - Financials	—		598,236		—		—		$	598,236
Corporate - Non Financials	—		1,308,628		—		—		$	1,308,628
RMBS – Agency	—		752		—		—		$	752
RMBS – Non-Agency	—		26,953		—		—		$	26,953
CMBS	—		122,481		—		—		$	122,481
Other asset-backed securities	—		149,795		—		—		$	149,795
Non-U.S. Government	—		933,516		—		—		$	933,516
Total fixed maturities - AFS - Life Funds Withheld Assets, at fair value	$	—	$	3,153,103	$	—	$	—	$	3,153,103
Total investments - AFS, at fair value	$	528,581	$	33,073,039	$	152,278	$	—	$	33,753,898

December 31, 2015 (U.S. dollars in thousands)	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Other Unobservable Inputs (Level 3)		Collateral and Counterparty Netting			Balance at December 31, 2015
Fixed maturities - Trading
U.S. Government	$	—	$	4,990	$	—	$	—		$	4,990
Corporate - Financials	—		335,956		—		—			$	335,956
Corporate - Non Financials	—		493,621		—		—			$	493,621
RMBS – Agency	—		368		—		—			$	368
CMBS	—		4,803		—		—			$	4,803
Other asset-backed securities	—		25,700		—		—			$	25,700
Non-U.S. Government	—		370,261		—		—			$	370,261
Total fixed maturities - Trading, at fair value	$	—	$	1,235,699	$	—	$	—		$	1,235,699
Short-term investments, at fair value (1)	—		60,330		—		—			$	60,330
Total investments, Trading	$	—	$	1,296,029	$	—	$	—		$	1,296,029
Cash equivalents (2)	437,742		830,924		—		—			$	1,268,666
Cash equivalents - Life Funds Withheld Assets (2)	517		100,757		—		—			$	101,274
Other investments (3)	—		1,008,176		283,550		—			$	1,291,726
Other assets (4)	—		69,914		19,400		(3,087		)	$	86,227
Total assets accounted for at fair value	$	966,840	$	36,378,839	$	455,228	$	(3,087	)	$	37,797,820
Liabilities
Funds withheld on GreyCastle life retrocession arrangements (net of future policy benefit reserves recoverable) (5)	$	—	$	463,915	$	—	$	—		$	463,915
Financial instruments sold, but not yet purchased (6)	347		—		—		—			$	347
Other liabilities (4)	—		16,304		29,191		(3,087		)	$	42,408
Total liabilities accounted for at fair value	$	347	$	480,219	$	29,191	$	(3,087	)	$	506,670

____________

(1) Short-term investments consist primarily of Corporate securities and U.S. and Non-U.S. Government and Government-Related/Supported securities.

(2) Cash equivalents balances subject to fair value measurement include certificates of deposit and money market funds. Operating cash balances are not subject to recurring fair value measurement guidance.

(3) The Other investments balance excludes certain structured transactions including certain investments in project finance transactions, and a payment obligation and liquidity financing provided to a structured credit vehicle as a part of a third party medium term note facility. These investments, which totaled $141.5 million as of March 31, 2016 and $141.3 million as of December 31, 2015, are carried at amortized cost. For further information, see Item 8, Note 8, "Other Investments," to the Consolidated Financial Statements included in our Annual Report on Form 10-K for the year ended December 31, 2015.

(4) Other assets and other liabilities include derivative instruments. The derivative balances included in each category are reported on a gross basis by level with a netting adjustment presented separately in the Collateral and Counterparty Netting column. The fair values of the individual derivative contracts are reported gross in their respective levels based on the fair value hierarchy. For further details regarding derivative fair values and associated collateral received or paid, see Note 7, "Derivative Instruments."

(5) Funds withheld on GreyCastle life retrocession arrangements (net of future policy benefit reserves recoverable) include balances related to the life retrocession embedded derivative, under which all investment results associated with the Life Funds Withheld Assets related to the GreyCastle Life Retro Arrangements described in Note 1, "Basis of Preparation and Consolidation," accrue to the benefit of GCLR.

(6) Financial instruments sold, but not yet purchased, represent "short sales" and are included within "Payable for investments purchased" on the balance sheets.

(b) Level 2 Asset Valuations

U.S. Government, Corporate - Financials, Corporate - Non Financials and Non-U.S. Government

Transaction activity inputs utilized in the valuation of fair value hierarchy Level 2 securities within these sub-categories include actual trades, dealer posts, results of bids-wanted, institutional secondary offerings, primary market offerings and Trade Reporting and Compliance Engine ("TRACE") trade feeds. As part of the evaluation process, transaction activity is compared to prior evaluations and necessary adjustments are made accordingly. Market-color inputs include actively quoted benchmark issues, buy-side/evaluator dialogue, sell-side/evaluator dialogue and credit derivative indices.

RMBS - Agency, RMBS - Non-Agency, CMBS, CDO and Other asset-backed securities

As part of the fair valuation process, Level 2 securities in these sub-categories are analyzed by collateral type, deal structure, deal performance and vintage. Market inputs into the valuation process for each sub-category include reported or observed trades, results of bids-wanted, buy-side/sell-side evaluator dialogue, dealer offering and market research reports. Cash flow inputs into the evaluation process include conditional prepayment rates, conditional decay rates, delinquency and loss severity rates. This assumptive data is reviewed and updated using third party reported information to reflect current market convention.

U.S. States and political subdivisions of the States

Transaction activity inputs utilized in the valuation of fair value hierarchy Level 2 securities within this sub-category include client and broker trades, dealer posts, results of bids-wanted, institutional secondary offerings, primary market offerings, and Municipal Securities Rulemaking trade feeds. As part of the evaluation process, transaction activity is compared to prior evaluations and necessary adjustments are made accordingly. Market-color inputs include bids, offerings, two-sided markets, buy-side/evaluator dialogue and sell-side/evaluator dialogue. Credit information inputs include issuer financial statements, default and material event notices, developer reports and liquidation and restructuring analysis.

Equity securities and other investments

Other investment securities generally include investments in thinly traded equity funds and hedge funds. Fair value is determined based upon the most recent net asset values (“NAV’) received from the fund administrators, the nature of the underlying investments in the funds and the frequency of subscriptions or redemptions as dictated by the fund’s governing documents.

Other assets and other liabilities

Other assets and other liabilities primarily include over-the-counter (“OTC”) derivatives, which are valued using market transactions and other market evidence whenever possible, including market-based inputs to models, model calibration to market clearing transactions, broker or dealer quotations or alternative independent pricing sources where an understanding of the inputs utilized in arriving at the valuations is obtained. Where models are used, the selection of a particular model to value an OTC derivative depends upon the contractual terms and specific risks inherent in the instrument as well as the availability of pricing information in the market. The Company generally uses similar models to value similar instruments. Valuation models require a variety of inputs, including contractual terms, market prices, yield curves, credit curves, measures of volatility, prepayment rates and correlations of such inputs. For OTC derivatives that trade in liquid markets, such as generic forwards, interest rate swaps and options, model inputs can generally be verified and model selection does not involve significant management judgment.

There were no significant transfers between Level 1 and Level 2 during each of the three months ended March 31, 2016 and 2015.

(c) Level 3 Assets and Liabilities

The tables below present additional information about assets and liabilities measured at fair value on a recurring basis and for which Level 3 inputs were utilized to determine fair value. The tables present a reconciliation of the beginning and ending balances for the three months ended March 31, 2016 and 2015 for all financial assets and liabilities measured at fair value using significant unobservable inputs (Level 3) at March 31, 2016 and 2015, respectively. The tables do not include gains or losses that were reported in Level 3 in prior periods for assets that were transferred out of Level 3 prior to March 31, 2016 and 2015, respectively. Gains and losses for assets and liabilities classified within Level 3 in the table below may include changes in fair value that are attributable to both observable inputs (Levels 1 and 2) and unobservable inputs (Level 3). Further, it should be noted that the following tables do not take into consideration the effect of offsetting Level 1 and 2 financial instruments entered into by the Company that are either economically hedged by certain exposures to the Level 3 positions or that hedge the exposures in Level 3 positions.

In general, Level 3 assets include securities for which values were obtained from brokers where either significant inputs were utilized in determining the values that were difficult to corroborate with observable market data, or sufficient information regarding the specific inputs utilized by the broker was not available to support a Level 2 classification. Transfers into or out of Level 3 primarily arise as a result of the valuations utilized by the Company changing between either those provided by independent pricing services that do not contain significant unobservable inputs and other valuations sourced from brokers that are considered Level 3.

Fixed maturities and short-term investments

The Company’s Level 3 assets consist primarily of U.S. Government and Government-Related/Supported, Corporates and CDOs, for which non-binding broker quotes are the primary source of the valuations. Sufficient information regarding the specific inputs utilized by the brokers was not available to support a Level 2 classification. The Company obtains the majority of broker quotes for these securities from third party investment managers who perform independent verifications of these valuations using pricing matrices based upon information gathered by market traders. In addition, for the majority of these securities, the Company compares the broker quotes to independent valuations obtained from third party pricing vendors, which may also consist of broker quotes, to assess if the prices received represent a reasonable estimate of the fair value. Although the Company does not have access to the specific unobservable inputs that may have been used in the fair value measurements of these securities provided by brokers, we would expect that the significant inputs considered are prepayment rates, probability of default, loss severity in the event of default, recovery rates, liquidity premium and reinvestment rates. Significant increases (decreases) in any of those inputs in isolation could result in a significantly different fair value measurement. Generally, a change in the assumption used for the probability of default is accompanied by a directionally similar change in the assumption used for the loss severity and a directionally opposite change in the assumption used for prepayment rates.

The remainder of the Level 3 assets relate primarily to private investments (including funds) and certain derivative positions as described below.

Other investments

Included within the other investments component of the Company’s Level 3 valuations are private investments (including funds) and hedge funds where the Company is not deemed to have significant influence over the investee. The fair value of these investments is based upon net asset values received from the investment manager or general partner of the respective entity. The nature of the underlying investments held by the investee that form the basis of the net asset value include assets such as private business ventures and are such that significant Level 3 inputs are utilized in the determination of the individual underlying holding values and, accordingly, the fair value of the Company’s investment in each entity is classified within Level 3. The Company has not adjusted the net asset values received; however, management incorporates factors such as the most recent financial information received, annual audited financial statements and the values at which capital transactions with the investee take place when applying judgment regarding whether any adjustments should be made to the net asset value in recording the fair value of each position. Investments in hedge funds included in other investments utilize strategies including arbitrage, directional, event driven and multi-style. The funds potentially have lockup and gate provisions that may limit redemption liquidity. For further details regarding the nature of other investments and related features, see Item 8, Note 8, "Other Investments," to the Consolidated Financial Statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2015.

Derivative instruments

Derivative instruments recorded within other liabilities and classified within Level 3 include credit derivatives sold that provide protection on senior tranches of structured finance transactions where the value is obtained directly from the investment bank counterparty and sufficient information regarding the inputs utilized in such valuation was not obtained to support a Level 2 classification and guaranteed minimum income benefits embedded within one reinsurance contract. The majority of inputs utilized in the valuations of these types of derivative contracts are considered Level 1 or Level 2; however, each valuation includes at least one Level 3 input that was significant to the valuation and, accordingly, the values are disclosed within Level 3.

The calculation of the change in fair value of the embedded derivative associated with the GreyCastle Life Retro Arrangements includes the interest income, realized and unrealized gains and losses on Life Funds Withheld Assets and certain related expenses related to the Life Funds Withheld Assets. The fair value of the embedded derivative is included in “Funds withheld on GreyCastle life retrocession arrangements, net of future policy benefit reserves recoverable” on the consolidated balance sheets. The fair value of the embedded derivative is considered a Level 2 valuation.

	Level 3 Assets and Liabilities - Three Months Ended March 31, 2016
(U.S. dollars in thousands)	U.S. Government			Corporate - Financials			Corporate - Non-Financials			RMBS - Agency
Balance, beginning of period	$	45,063		$	53,685		$	188		$	3,077
Realized gains (losses)	(37		)	53			—			(3		)
Movement in unrealized gains (losses)	593			(39		)	(1		)	7
Purchases and issuances	—			169			—			—
Sales	—			—			—			—
Settlements	(679		)	—			(6		)	(228		)
Transfers into Level 3	—			—			—			—
Transfers out of Level 3	—			(10,285		)	—			—
Fixed maturities to short-term investments classification change				—			—			—
Balance, end of period	$	44,940		$	43,583		$	181		$	2,853
Movement in total gains (losses) above relating to instruments still held at the reporting date	$	554		$	15		$	(1	)	$	4
(U.S. dollars in thousands)	RMBS - Non Agency			CMBS			CDO			Other asset- backed securities
Balance, beginning of period	$	—		$	—		$	32,408		$	17,857
Realized gains (losses)	—			—			41			1,049
Movement in unrealized gains (losses)	—			—			5,257			(2,758		)
Purchases and issuances	—			—			—			—
Sales	—			—			—			—
Settlements	—			—			(15,977		)	(11,948		)
Transfers into Level 3	—			—			—			—
Transfers out of Level 3	—			—			—			—
Fixed maturities to short-term investments classification change	—			—			—			—
Balance, end of period	$	—		$	—		$	21,729		$	4,200
Movement in total gains (losses) above relating to instruments still held at the reporting date	$	—		$	—		$	5,297		$	(1,708	)
(U.S. dollars in thousands)	Non-US Government			Short-term investments			Other investments			Derivative Contracts - Net
Balance, beginning of period	$	—		$	—		$	283,550		$	(9,791	)
Realized gains (losses)	—			—			5,807			—
Movement in unrealized gains (losses)	—			—			(2,717		)	(61		)
Purchases and issuances	—			—			13,779			—
Sales	—			—			—			—
Settlements	—			—			(14,818		)	—
Transfers into Level 3	—			—			15,494			—
Transfers out of Level 3	—			—			—			—
Fixed maturities to short-term investments classification change	—			—			—			—
Balance, end of period	$	—		$	—		$	301,095		$	(9,852	)
Movement in total gains (losses) above relating to instruments still held at the reporting date	$	—		$	—		$	3,090		$	(61	)

	Level 3 Assets and Liabilities - Three Months Ended March 31, 2015
(U.S. dollars in thousands)	U.S. Government		Corporate - Financials		Corporate - Non-Financials			RMBS - Agency
Balance, beginning of period	$	—	$	—	$	5,894		$	1,910
Realized gains (losses)	—		—		(1		)	—
Movement in unrealized gains (losses)	—		—		48			(1		)
Purchases and issuances (1)	—		—		—			—
Sales	—		—		—			—
Settlements	—		—		(80		)	(89		)
Transfers into Level 3	—		—		—			—
Transfers out of Level 3	—		—		—			—
Fixed maturities to short-term investments classification change	—		—		—			—
Balance, end of period	$	—	$	—	$	5,861		$	1,820
Movement in total gains (losses) above relating to instruments still held at the reporting date	$	—	$	—	$	48		$	(1	)
(U.S. dollars in thousands)	RMBS - Non Agency		CMBS		CDO			Other asset- backed securities
Balance, beginning of period	$	—	$	—	$	687,958		$	5,288
Realized gains (losses)	—		—		36			(1		)
Movement in unrealized gains (losses)	—		—		5,555			2
Purchases and issuances (1)	—		—		—			—
Sales	—		—		(155,085		)	—
Settlements	—		—		(41,541		)	(3,045		)
Transfers into Level 3	—		—		—			—
Transfers out of Level 3	—		—		—			—
Fixed maturities to short-term investments classification change	—		—		—			—
Balance, end of period	$	—	$	—	$	496,923		$	2,244
Movement in total gains (losses) above relating to instruments still held at the reporting date	$	—	$	—	$	2,668		$	—
(U.S. dollars in thousands)	Non-US Government		Short-term investments		Other investments			Derivative Contracts - Net
Balance, beginning of period	$	—	$	—	$	185,083		$	(9,764	)
Realized gains (losses)	—		—		1,302			—
Movement in unrealized gains (losses)	—		—		(1,827		)	158
Purchases and issuances (1)	—		—		6,793			—
Sales	—		—		—			—
Settlements	—		—		(1,254		)	—
Transfers into Level 3	—		—		—			—
Transfers out of Level 3	—		—		—			—
Fixed maturities to short-term investments classification change	—		—		—			—
Balance, end of period	$	—	$	—	$	190,097		$	(9,606	)
Movement in total gains (losses) above relating to instruments still held at the reporting date	$	—	$	—	$	(524	)	$	158

(d) Financial Instruments Not Carried at Fair Value

Authoritative guidance over disclosures about the fair value of financial instruments requires additional disclosure of fair value information for financial instruments not carried at fair value in both interim and annual reporting periods. Certain financial instruments, particularly insurance contracts, are excluded from these fair value disclosure requirements. The carrying values of cash and cash equivalents, accrued investment income, net receivable from investments sold, other assets, net payable for investments purchased, other liabilities and other financial instruments not included below approximated their fair values. The following table includes financial instruments for which the carrying value differs from the estimated fair values as of March 31, 2016 and December 31, 2015. All of these fair value estimates are considered Level 2 fair value measurements.

	March 31, 2016				December 31, 2015
(U.S. dollars in thousands)	Carrying Value		Fair Value		Carrying Value		Fair Value
Financial Assets - Other investments	$	141,459	$	153,844	$	141,329	$	154,065
Deposit liabilities	$	1,171,655	$	1,478,856	$	1,168,376	$	1,436,210
Notes payable and debt	2,645,647		2,815,562		2,644,970		2,805,152
Financial Liabilities	$	3,817,302	$	4,294,418	$	3,813,346	$	4,241,362

The Company historically participated in structured transactions. Remaining structured transactions include cash loans supporting project finance transactions, a liquidity facility financing provided to structured project deals and an investment in a payment obligation with an insurance company. These transactions are carried at amortized cost. The fair value of these investments held by the Company is determined through use of internal models utilizing reported trades, benchmark yields, broker/dealer quotes, issuer spreads, two-sided markets, benchmark securities, bids, offers and reference data.

Deposit liabilities include obligations under structured insurance and reinsurance transactions. For purposes of fair value disclosures, the Company determined the estimated fair value of the deposit liabilities by assuming a discount rate equal to the appropriate U.S. Treasury rate plus 38.0 basis points and 26.5 basis points as of March 31, 2016 and December 31, 2015, respectively. The discount rate incorporates the Company’s own credit risk into the determination of estimated fair value.

The fair values of the Company’s notes payable and debt outstanding were determined based on quoted market prices.

There are no significant concentrations of credit risk within the Company’s financial instruments as defined in the authoritative guidance over disclosures of fair value of financial instruments not carried at fair value, which excludes certain financial instruments, particularly insurance contracts.

XML

Segment Information

3 Months Ended

Mar. 31, 2016

Segment Reporting [Abstract]

Segment Information

Segment Information

The Company is organized into two operating segments: Insurance and Reinsurance. Subsequent to the transaction described in Note 3(c), "Acquisitions and Disposals - Catlin Acquisition," the underwriting results of the acquired businesses from the Acquisition Date through March 31, 2016 are included in the Company's Insurance or Reinsurance segment, as appropriate.

The Company’s general investment and financing operations are reflected in "Corporate and Other." Subsequent to the transaction described in Note 1, "Basis of Preparation and Consolidation," GCLR reinsures the majority of the Company's life reinsurance business through the GreyCastle Life Retro Arrangements. The results of the Run-Off Life Operations not subject to the GreyCastle Life Retro Arrangements are also reported within Corporate and Other.

The Company evaluates the performance of both the Insurance and Reinsurance segments based on underwriting profit. Other items of revenues and expenditures of the Company are not evaluated at the segment level. In addition, the Company does not allocate investment assets used to support its Property and Casualty ("P&C") operations to the individual segments, except as noted below. Investment assets related to the Company’s Run-Off Life Operations and certain structured products included in the Insurance and Reinsurance segments are held in separately identified portfolios. As such, net investment income from these assets is included in the contribution from the applicable segment or in Corporate and Other. The following tables summarize the segment results for the three months ended March 31, 2016 and 2015:

Three Months Ended March 31, 2016 (U.S. dollars in thousands, except ratios)	Insurance			Reinsurance			Total P&C			Corporate and Other (1)			Total
Gross premiums written	$	2,503,972		$	1,855,343		$	4,359,315		$	68,911		$	4,428,226
Net premiums written	1,503,934			1,557,661			3,061,595			3,164			3,064,759
Net premiums earned	1,593,874			757,572			2,351,446			3,164			2,354,610
Less: Net losses and loss expenses (2)	999,592			382,893			1,382,485			4,937			1,387,422
Less: Acquisition costs (2)	225,458			176,348			401,806			1,461			403,267
Less: Operating expenses (3)	312,432			79,234			391,666			218			391,884
Underwriting profit (loss)	$	56,392		$	119,097		$	175,489		$	(3,452	)	$	172,037
Net investment income - excluding Life Funds Withheld Assets (4)							143,131			8,533			151,664
Net investment income - Life Funds Withheld Assets										41,560			41,560
Net results from structured products (5)	1,222			748			1,970			—			1,970
Net fee income and other (6)	(3,862		)	837			(3,025		)	302			(2,723		)
Net realized gains (losses) on investments - excluding Life Funds Withheld Assets							(11,160		)	2,744			(8,416		)
Net realized gains (losses) on investments and net unrealized gains (losses) on investments, Trading - Life Funds Withheld Assets							—			101,166			101,166
Net realized and unrealized gains (losses) on derivative instruments							—			(3,622		)	(3,622		)
Net realized and unrealized gains (losses) on life retrocession embedded derivative and derivative instruments - Life Funds Withheld Assets							—			(236,080		)	(236,080		)
Net income (loss) from investment fund affiliates and operating affiliates							—			8,071			8,071
Gain on sale of operating affiliate										—			—
Less: Exchange (gains) losses							—			(33,819		)	(33,819		)
Less: Corporate operating expenses							—			112,510			112,510
Contribution from P&C and Corporate and Other							306,405			(159,469		)	146,936
Less: Interest expense (7)										41,613			41,613
Less: Non-controlling interests										61,143			61,143
Less: Income tax expense										22,295			22,295
Net income (loss) attributable to ordinary shareholders													$	21,885
Ratios – P&C operations: (8)
Loss and loss expense ratio	62.7		%	50.5		%	58.8		%
Underwriting expense ratio	33.8		%	33.8		%	33.7		%
Combined ratio	96.5		%	84.3		%	92.5		%

____________

(1) Corporate and Other includes other items of our revenue and expenditures that are not evaluated at the segment level for reporting purposes, as well as the Company's Run-Off Life Operations.

(2) The Company has reflected the amortization of certain fair value adjustments recorded in conjunction with the Catlin Acquisition within the respective segments.

(3) Operating expenses of the segments exclude Corporate operating expenses, shown separately.

(4) Net investment income - excluding Life Funds Withheld Assets does not include net investment income related to the net results from structured products.

(5) The net results from P&C structured products include net investment income and interest expense of $12.7 million and $10.7 million, respectively.

(6) Net fee income and other includes operating expenses from the Company's loss prevention consulting services business.

(7) Interest expense excludes interest expense related to structured products recorded in the Insurance and Reinsurance segments.

(8) Ratios are based on net premiums earned from P&C operations.

Three Months Ended March 31, 2015 (U.S. dollars in thousands, except ratios)	Insurance			Reinsurance			Total P&C			Corporate and Other (1)			Total
Gross premiums written	$	1,654,747		$	825,662		$	2,480,409		$	74,951		$	2,555,360
Net premiums written	1,089,108			747,635			1,836,743			14,506			1,851,249
Net premiums earned	962,306			357,188			1,319,494			14,506			1,334,000
Less: Net losses and loss expenses	616,947			152,880			769,827			19,387			789,214
Less: Acquisition costs	80,387			71,492			151,879			1,817			153,696
Less: Operating expenses (2)	208,457			42,495			250,952			931			251,883
Underwriting profit (loss)	$	56,515		$	90,321		$	146,836		$	(7,629	)	$	139,207
Net investment income - excluding Life Funds Withheld Assets (3)							132,808			10,210			143,018
Net investment income - Life Funds Withheld Assets										50,419			50,419
Net results from structured products (4)	2,905			2,120			5,025			—			5,025
Net fee income and other (5)	(7,465		)	825			(6,640		)	132			(6,508		)
Loss on sale of life reinsurance subsidiary							—			—			—
Net realized gains (losses) on investments - excluding Life Funds Withheld Assets							5,807			(1,205		)	4,602
Net realized gains (losses) on investments and net unrealized gains (losses) on investments, Trading - Life Funds Withheld Assets							—			48,289			48,289
Net realized and unrealized gains (losses) on derivative instruments							—			16,521			16,521
Net realized and unrealized gains (losses) on life retrocession embedded derivative and derivative instruments - Life Funds Withheld Assets							—			(229,367		)	(229,367		)
Net income (loss) from investment fund affiliates and operating affiliates							—			57,997			57,997
Less: Exchange (gains) losses							—			27,390			27,390
Less: Corporate operating expenses							—			62,443			62,443
Contribution from P&C and Corporate and Other							283,836			(144,466		)	139,370
Less: Interest expense (6)										41,481			41,481
Less: Non-controlling interests										37,390			37,390
Less: Income tax expense										24,218			24,218
Net income (loss) attributable to ordinary shareholders													$	36,281
Ratios – P&C operations: (7)
Loss and loss expense ratio	64.1		%	42.8		%	58.3		%
Underwriting expense ratio	30.0		%	31.9		%	30.6		%
Combined ratio	94.1		%	74.7		%	88.9		%

____________

(1) Corporate and Other includes other items of our revenue and expenditures that are not evaluated at the segment level for reporting purposes, as well as the Company's Run-Off Life Operations.

(2) Operating expenses of the segments exclude Corporate operating expenses, shown separately.

(3) Net investment income - excluding Life Funds Withheld Assets does not include net investment income related to the net results from structured products.

(4) The net results from P&C structured products include net investment income and interest expense of $15.1 million and $10.0 million, respectively.

(5) Net fee income and other includes operating expenses from the Company's loss prevention consulting services business.

(6) Interest expense excludes interest expense related to structured products recorded in the Insurance and Reinsurance segments.

(7) Ratios are based on net premiums earned from P&C operations.

The following tables summarize the Company’s net premiums earned by line of business for the three months ended March 31, 2016 and 2015:

Three Months Ended March 31, 2016 (U.S. dollars in thousands)	Insurance		Reinsurance		Corporate and Other			Total
P&C Operations:
Professional	$	332,954	$	43,155	$	—		$	376,109
Casualty	420,212		154,739		—			574,951
Property catastrophe	—		205,301		—			205,301
Property	359,633		254,399		—			614,032
Specialty	367,352		36,193		—			403,545
Other (1)	113,723		63,785		—			177,508
Total P&C Operations	$	1,593,874	$	757,572	$	—		$	2,351,446
Corporate and Other:
Run-off Life operations - Annuity	$	—	$	—	$	—		$	—
Run-off Life operations - Other Life	—		—		3,164			3,164
Total Corporate and Other	$	—	$	—	$	3,164		$	3,164
Total	$	1,593,874	$	757,572	$	3,164		$	2,354,610
Three Months Ended March 31, 2015 (U.S. dollars in thousands)	Insurance		Reinsurance		Corporate and Other			Total
P&C Operations:
Professional	$	266,410	$	35,008	$	—		$	301,418
Casualty	341,317		58,208		—			399,525
Property catastrophe	—		94,073		—			94,073
Property	172,539		131,224		—			303,763
Specialty	171,878		18,075		—			189,953
Other (1)	10,162		20,600		—			30,762
Total P&C Operations	$	962,306	$	357,188	$	—		$	1,319,494
Corporate and Other:
Run-off Life operations - Annuity	$	—	$	—	$	(1	)	$	(1	)
Run-off Life operations - Other Life	—		—		14,507			14,507
Total Corporate and Other	$	—	$	—	$	14,506		$	14,506
Total	$	962,306	$	357,188	$	14,506		$	1,334,000

____________

(1) Other within the Insurance segment includes: excess and surplus, programs, surety, structured indemnity and certain discontinued lines. Other within the Reinsurance segment includes: whole account contracts, structured indemnity and other lines.

XML

Investments

3 Months Ended

Mar. 31, 2016

Investments, Debt and Equity Securities [Abstract]

Investments

Investments

(a) Fixed Maturities, Short-Term Investments and Equity Securities

Amortized Cost and Fair Value Summary

The cost (amortized cost for fixed maturities and short-term investments), fair value, gross unrealized gains and gross unrealized (losses), including non-credit related OTTI recorded in AOCI, of the Company’s AFS investments as of March 31, 2016 and December 31, 2015, were as follows:

			Included in AOCI
March 31, 2016 (U.S. dollars in thousands)	Cost or Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value		Non-credit Related OTTI (1)
Fixed maturities - AFS
U.S. Government	$	4,483,796	$	101,066	$	(7,875	)	$	4,576,987	$	—
Corporate - Financials	3,656,521		75,341		(27,547		)	3,704,315		—
Corporate - Non Financials	6,935,636		210,829		(54,955		)	7,091,510		—
RMBS – Agency	4,259,838		112,260		(5,091		)	4,367,007		—
RMBS – Non-Agency	303,377		20,313		(20,847		)	302,843		(52,025		)
CMBS	317,886		10,324		(2,725		)	325,485		(1,163		)
CDO	25,845		2		(4,118		)	21,729		(1,208		)
Other asset-backed securities	1,154,679		19,123		(10,904		)	1,162,898		(1,027		)
U.S. States and political subdivisions of the States	2,436,400		149,140		(793		)	2,584,747		—
Non-U.S. Governments	5,442,418		161,392		(57,115		)	5,546,695		—
Total fixed maturities - AFS - Excluding Life Funds Withheld Assets	$	29,016,396	$	859,790	$	(191,970	)	$	29,684,216	$	(55,423	)
Total short-term investments - Excluding Life Funds Withheld Assets	317,939		433		(1,068		)	317,304		—
Total equity securities	831,543		93,517		(46,653		)	878,407		—
Total investments - AFS - Excluding Life Funds Withheld Assets	$	30,165,878	$	953,740	$	(239,691	)	$	30,879,927	$	(55,423	)
Fixed maturities - AFS - Life Funds Withheld Assets
U.S. Government	$	10,315	$	2,377	$	—		$	12,692	$	—
Corporate - Financials	486,901		60,378		—			547,279		—
Corporate - Non Financials	1,058,886		210,376		—			1,269,262		—
RMBS – Agency	597		136		—			733		—
RMBS – Non-Agency	23,172		2,657		—			25,829		—
CMBS	92,586		16,328		—			108,914		—
Other asset-backed securities	105,635		16,086		—			121,721		—
Non-U.S. Governments	650,259		226,668		—			876,927		—
Total fixed maturities - AFS - Life Funds Withheld Assets	$	2,428,351	$	535,006	$	—		$	2,963,357	$	—
Total investments - AFS	$	32,594,229	$	1,488,746	$	(239,691	)	$	33,843,284	$	(55,423	)

____________

(1) Represents the non-credit component of OTTI losses, adjusted for subsequent sales of securities. It does not include the change in fair value subsequent to the impairment measurement date.

December 31, 2015 (U.S. dollars in thousands)	Cost or Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value		Non-credit Related OTTI (1)
Fixed maturities - AFS - Excluding Life Funds Withheld Assets
U.S. Government	$	5,047,621	$	52,355	$	(34,339	)	$	5,065,637	$	—
Corporate - Financials	3,535,830		49,535		(23,456		)	3,561,909		—
Corporate - Non Financials	6,867,525		130,568		(97,646		)	6,900,447		—
RMBS – Agency	3,697,756		77,776		(17,561		)	3,757,971		—
RMBS – Non-Agency	319,876		25,644		(16,980		)	328,540		(54,200		)
CMBS	401,713		7,933		(4,330		)	405,316		(1,182		)
CDOs	41,679		4		(9,273		)	32,410		(1,208		)
Other asset-backed securities	1,164,426		17,665		(13,519		)	1,168,572		(1,144		)
U.S. States and political subdivisions of the States	2,514,048		125,395		(7,373		)	2,632,070		—
Non-U.S. Government	5,249,148		100,383		(97,917		)	5,251,614		—
Total fixed maturities - AFS - Excluding Life Funds Withheld Assets	$	28,839,622	$	587,258	$	(322,394	)	$	29,104,486	$	(57,734	)
Total short-term investments - Excluding Life Funds Withheld Assets	$	618,851	$	967	$	(2,428	)	$	617,390	$	—
Total equity securities - Excluding Life Funds Withheld Assets	$	834,079	$	89,993	$	(45,153	)	$	878,919	$	—
Total investments - AFS - Excluding Life Funds Withheld Assets	$	30,292,552	$	678,218	$	(369,975	)	$	30,600,795	$	(57,734	)
Fixed maturities - AFS - Life Funds Withheld Assets
U.S. Government	$	10,721	$	2,021	$	—		$	12,742	$	—
Corporate - Financials	531,016		67,220		—			598,236		—
Corporate - Non Financials	1,132,926		175,702		—			1,308,628		—
RMBS – Agency	591		161		—			752		—
RMBS – Non-Agency	24,401		2,552		—			26,953		—
CMBS	107,968		14,513		—			122,481		—
Other asset-backed securities	132,674		17,121		—			149,795		—
Non-U.S. Governments	737,735		195,781		—			933,516		—
Total fixed maturities - AFS - Life Funds Withheld Assets	$	2,678,032	$	475,071	$	—		$	3,153,103	$	—
Total investments - AFS	$	32,970,584	$	1,153,289	$	(369,975	)	$	33,753,898	$	(57,734	)

____________

(1) Represents the non-credit component of OTTI losses, adjusted for subsequent sales of securities. It does not include the change in fair value subsequent to the impairment measurement date.

The cost (amortized cost for fixed maturities and short-term investments) and fair value of the Company’s Trading investments at December 31, 2016 and 2015, were as follows:

March 31, 2016 (U.S. dollars in thousands)	Amortized Cost		Fair Value
Fixed maturities - Trading - Life Funds Withheld Assets
U.S. Government	$	15,567	$	15,267
Corporate - Financials	379,848		382,755
Corporate - Non Financials	549,458		558,284
RMBS – Agency	1,917		1,869
CMBS	4,675		4,760
Other asset-backed securities	25,457		25,615
Non-U.S. Governments	390,986		421,033
Total fixed maturities - Trading - Life Funds Withheld Assets	$	1,367,908	$	1,409,583
Total short-term investments - Trading - Life Funds Withheld Assets	$	26,949	$	26,959
Total investments - Trading - Life Funds Withheld Assets	$	1,394,857	$	1,436,542

December 31, 2015 (U.S. dollars in thousands)	Amortized Cost		Fair Value
Fixed maturities - Trading - Life Funds Withheld Assets
U.S. Government	$	4,957	$	4,990
Corporate - Financials	344,070		335,956
Corporate - Non Financials	509,441		493,621
RMBS – Agency	370		368
CMBS	4,874		4,803
Other asset-backed securities	26,405		25,700
Non-U.S. Governments	373,492		370,261
Total fixed maturities - Trading - Life Funds Withheld Assets	$	1,263,609	$	1,235,699
Total short-term investments - Trading - Life Funds Withheld Assets	$	60,176	$	60,330
Total investments - Trading - Life Funds Withheld Assets	$	1,323,785	$	1,296,029

As of March 31, 2016 and December 31, 2015, approximately 2.1% and 2.0%, respectively, of the Company's fixed income investment portfolio at fair value, excluding Life Funds Withheld Assets, was invested in securities that were below investment grade or not rated. Approximately 18.3% and 14.7% of the gross unrealized losses in the Company's fixed income investment portfolio, excluding Life Funds Withheld Assets, as of March 31, 2016 and December 31, 2015, respectively, related to securities that were below investment grade or not rated.

Contractual Maturities Summary

The contractual maturities of AFS fixed income securities at March 31, 2016 and December 31, 2015 are shown below. Actual maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties.

	March 31, 2016				December 31, 2015
(U.S. dollars in thousands)	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Fixed maturities - AFS - Excluding Life Funds Withheld Assets
Due less than one year	$	2,156,182	$	2,151,862	$	2,106,851	$	2,104,106
Due after 1 through 5 years	13,787,996		14,020,514		14,051,494		14,143,461
Due after 5 through 10 years	5,622,857		5,828,464		5,680,830		5,740,954
Due after 10 years	1,387,736		1,503,414		1,374,997		1,423,156
	$	22,954,771	$	23,504,254	$	23,214,172	$	23,411,677
RMBS – Agency	4,259,838		4,367,007		3,697,756		3,757,971
RMBS – Non-Agency	303,377		302,843		319,876		328,540
CMBS	317,886		325,485		401,713		405,316
CDOs	25,845		21,729		41,679		32,410
Other asset-backed securities	1,154,679		1,162,898		1,164,426		1,168,572
Total mortgage and asset-backed securities	$	6,061,625	$	6,179,962	$	5,625,450	$	5,692,809
Total fixed maturities - AFS - Excluding Life Funds Withheld Assets	$	29,016,396	$	29,684,216	$	28,839,622	$	29,104,486
Fixed maturities - AFS - Life Funds Withheld Assets
Due less than one year	$	78,629	$	88,560	$	81,700	$	92,921
Due after 1 through 5 years	361,106		391,528		386,810		416,743
Due after 5 through 10 years	470,386		547,171		491,621		558,805
Due after 10 years	1,296,240		1,678,901		1,452,267		1,784,653
	$	2,206,361	$	2,706,160	$	2,412,398	$	2,853,122
RMBS – Agency	597		733		591		752
RMBS – Non-Agency	23,172		25,829		24,401		26,953
CMBS	92,586		108,914		107,968		122,481
Other asset-backed securities	105,635		121,721		132,674		149,795
Total mortgage and asset-backed securities	$	221,990	$	257,197	$	265,634	$	299,981
Total fixed maturities - AFS - Life Funds Withheld Assets	$	2,428,351	$	2,963,357	$	2,678,032	$	3,153,103
Total fixed maturities - AFS	$	31,444,747	$	32,647,573	$	31,517,654	$	32,257,589

	March 31, 2016				December 31, 2015
(U.S. dollars in thousands)	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Fixed maturities - Trading - Life Funds Withheld Assets
Due less than one year	$	8,177	$	8,831	$	4,573	$	5,096
Due after 1 through 5 years	290,320		291,356		278,163		272,220
Due after 5 through 10 years	314,590		320,720		280,487		277,920
Due after 10 years	722,772		756,432		668,737		649,592
	$	1,335,859	$	1,377,339	$	1,231,960	$	1,204,828
RMBS – Agency	1,917		1,869		370		368
CMBS	4,675		4,760		4,874		4,803
Other asset-backed securities	25,457		25,615		26,405		25,700
Total mortgage and asset-backed securities	$	32,049	$	32,244	$	31,649	$	30,871
Total fixed maturities - Trading - Life Funds Withheld Assets	$	1,367,908	$	1,409,583	$	1,263,609	$	1,235,699

Pledged Assets

Certain of the Company's invested assets are held in trust and pledged in support of insurance and reinsurance liabilities as well as credit facilities. Such pledges are largely required by the Company's operating subsidiaries that are "non-admitted" under U.S. state insurance regulations, in order for the U.S. cedant to receive statutory credit for reinsurance. Also included are Life Funds Withheld Assets as noted in Note 1, "Basis of Preparation and Consolidation." Additionally, certain deposit liabilities and annuity contracts require the use of pledged assets. As of March 31, 2016 and December 31, 2015, the Company had $19.0 billion and $18.3 billion in pledged assets, respectively.

(b) Gross Unrealized Losses

The following is an analysis of how long the AFS securities as of March 31, 2016 and December 31, 2015 had been in a continual unrealized loss position:

	Less than 12 months					Equal to or greater than 12 months
March 31, 2016 (U.S. dollars in thousands)	Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses
Fixed maturities and short-term investments - AFS
U.S. Government	$	465,423	$	(4,923	)	$	96,406	$	(2,984	)
Corporate – Financials	588,595		(18,228		)	141,508		(9,330		)
Corporate – Non Financials	930,465		(29,994		)	287,849		(25,073		)
RMBS – Agency	151,135		(1,128		)	327,657		(3,963		)
RMBS – Non-Agency	35,930		(1,867		)	175,881		(18,980		)
CMBS	31,661		(255		)	55,310		(2,470		)
CDOs	12,368		(509		)	9,359		(3,609		)
Other asset-backed securities	282,395		(2,113		)	60,638		(8,791		)
U.S. States and political subdivisions of the States	91,846		(379		)	15,528		(414		)
Non-U.S. Governments	965,976		(22,116		)	370,747		(35,912		)
Total fixed maturities and short-term investments - AFS	$	3,555,794	$	(81,512	)	$	1,540,883	$	(111,526	)
Total equity securities	$	365,368	$	(46,653	)	$	—	$	—

	Less than 12 months					Equal to or greater than 12 months
December 31, 2015 (U.S. dollars in thousands)	Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses
Fixed maturities and short-term investments - AFS
U.S. Government	$	3,762,869	$	(29,339	)	$	89,113	$	(5,044	)
Corporate – Financials	1,641,021		(13,280		)	102,022		(10,192		)
Corporate – Non Financials	3,275,270		(73,069		)	227,527		(24,706		)
RMBS – Agency	1,065,055		(10,046		)	221,211		(7,515		)
RMBS – Non-Agency	19,614		(1,104		)	180,146		(15,876		)
CMBS	118,605		(1,561		)	78,651		(2,769		)
CDOs	12,311		(516		)	20,096		(8,757		)
Other asset-backed securities	572,671		(5,252		)	57,563		(8,268		)
U.S. States and political subdivisions of the States	565,055		(6,609		)	12,259		(765		)
Non-U.S. Governments	1,921,286		(53,440		)	474,929		(46,714		)
Total fixed maturities and short-term investments - AFS	$	12,953,757	$	(194,216	)	$	1,463,517	$	(130,606	)
Total equity securities	$	356,742	$	(45,153	)	$	—	$	—

The Company had gross unrealized losses totaling $239.7 million on 1,934 securities out of a total of 8,763 held as of March 31, 2016 in its AFS - Excluding Life Funds Withheld Assets portfolio, which either it considers to be temporarily impaired or with respect to which it reflects non-credit losses on other-than-temporarily impaired assets. Individual security positions comprising this balance have been evaluated by management to determine the severity of these impairments and whether they should be considered other-than-temporary. Management believes it is more likely than not that the issuer will be able to fund sufficient principal and interest payments to support the current amortized cost.

(c) Net Realized Gains (Losses)

The following represents an analysis of net realized gains (losses) on investments:

Net Realized Gains (Losses) on Investments	Three months ended March 31,
(U.S. dollars in thousands)	2016			2015
Net realized gains (losses) on investments - excluding Life Funds Withheld Assets:
Gross realized gains	$	61,227		$	62,300
Gross realized losses on investments sold	(50,063		)	(47,122		)
OTTI on investments, net of amounts transferred to other comprehensive income	(19,580		)	(10,576		)
	$	(8,416	)	$	4,602
Net realized gains (losses) on investments and net unrealized gains (losses) on investments, Trading - Life Funds Withheld Assets:
Gross realized gains	$	62,850		$	53,128
Gross realized losses on investments sold	(28,434		)	(390		)
OTTI on investments, net of amounts transferred to other comprehensive income	(2,346		)	(5,209		)
Net unrealized gains (losses) on trading securities	$	69,096		$	760
	$	101,166		$	48,289
Total net realized gains (losses) on investments	$	92,750		$	52,891

The significant components of the net impairment charges of $19.6 million for investments excluding Life Funds Withheld Assets for the three months ended March 31, 2016 were:

▪ $9.8 million related to certain high yield securities where we determined that the likely recovery on these securities was below the carrying value.

▪ $7.0 million related to certain equities that were in a loss position for more than 11 months or impaired by more than 50% of their amortized cost.

▪ $0.6 million for structured securities, where we determined that the likely recovery on these securities was below the carrying value and, accordingly, recorded an impairment of the securities to the discounted value of the cash flows expected to be received on these securities.

▪ $0.3 million related to certain U.S. Municipal securities that we no longer intend to hold for a period sufficient to recover their fair value to amortized cost.

▪ $1.9 million related to foreign exchange losses.

The following table sets forth the amount of credit loss impairments on fixed income securities for which a portion of the OTTI loss was recognized in OCI and that were held by the Company as of the dates or for the periods indicated and the corresponding changes in such amounts.

Credit Loss Impairments	Three months ended March 31,
(U.S. dollars in thousands)	2016			2015
Opening balance as of beginning of indicated period	$	73,469		$	131,942
Credit loss impairment recognized in the current period on securities not previously impaired	10,567			7,560
Credit loss impairments previously recognized on securities that matured, paid down, prepaid or were sold during the period	(4,877		)	(28,539		)
Additional credit loss impairments recognized in the current period on securities previously impaired	230			141
Accretion of credit loss impairments previously recognized due to an increase in cash flows expected to be collected	(2,410		)	(2,646		)
Balance as of March 31,	$	76,979		$	108,458

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Derivative Instruments

3 Months Ended

Mar. 31, 2016

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative Instruments

Derivative Instruments

The Company enters into derivative instruments for both risk management and efficient portfolio management. The Company is exposed to potential loss from various market risks, and manages its market risks based on guidelines established by management and the Risk and Finance Committee of the Company's Board of Directors. The Company recognizes all derivatives as either assets or liabilities on the balance sheets and measures those instruments at fair value, with the changes in fair value of derivatives shown in the consolidated statement of income as "Net realized and unrealized gains (losses) on derivative instruments" unless the derivatives are designated as hedging instruments. The accounting for derivatives that are designated as hedging instruments is described in Item 8, Note 2(h), "Significant Accounting Policies - Derivative Instruments," to the Consolidated Financial Statements included in the Company's Annual Report on Form 10-K for the year ended December 31, 2015.

The following table summarizes information on the location and gross amounts of derivative fair values contained in the consolidated balance sheets as of March 31, 2016 and December 31, 2015:

	March 31, 2016								December 31, 2015
(U.S. dollars in thousands)	Asset Derivative Notional Amount		Asset Derivative Fair Value (1)		Liability Derivative Notional Amount		Liability Derivative Fair Value (1)		Asset Derivative Notional Amount		Asset Derivative Fair Value (1)		Liability Derivative Notional Amount		Liability Derivative Fair Value (1)
Derivatives designated as hedging instruments:
Foreign exchange contracts	$	1,216,823	$	50,707	$	1,001,752	$	54,387	$	1,667,585	$	64,289	$	674,976	$	11,941
Total derivatives designated as hedging instruments	$	1,216,823	$	50,707	$	1,001,752	$	54,387	$	1,667,585	$	64,289	$	674,976	$	11,941
Derivatives not designated as hedging instruments:
Investment Related Derivatives:
Foreign exchange exposure	199,007		2,501		46,628		534		102,234		2,888		144,707		1,702
Credit exposure	5,000		414		70,682		11,869		8,433		652		71,614		12,067
Financial market exposure	5		4		28,480		1,384		37		77		26,500		417

	March 31, 2016										December 31, 2015
(U.S. dollars in thousands)	Asset Derivative Notional Amount		Asset Derivative Fair Value (1)			Liability Derivative Notional Amount		Liability Derivative Fair Value (1)			Asset Derivative Notional Amount		Asset Derivative Fair Value (1)			Liability Derivative Notional Amount		Liability Derivative Fair Value (1)
Other Non-Investment Derivatives:
Foreign exchange contracts	188,400		2,492			—		—			194,566		2,009			—		—
Credit exposure	—		—			30,090		28			29,874		31			—		—
Guaranteed minimum income benefit contract	49,562		20,486			49,562		20,486			46,032		19,368			46,032		19,368
Modified coinsurance funds withheld contracts (2)	58,719		—			4,556,696		—			60,667		—			4,620,879		—
Total derivatives not designated as hedging instruments	$	500,693	$	25,897		$	4,782,138	$	34,301		$	441,843	$	25,025		$	4,909,732	$	33,554
Total derivatives			$	76,604				$	88,688				$	89,314				$	45,495
Counterparty netting			(37,870		)			(37,870		)			(3,087		)			(3,087		)
Total derivatives net of counterparty netting (1)			38,734					50,818					86,227					42,408
Cash collateral held/paid (3)			(5,520		)			(4,230		)			(30,958		)			—
Total derivatives as recorded in the balance sheets			$	33,214				$	46,588				$	55,269				$	42,408

____________

(1) Derivative instruments in an asset or liability position are included within Other assets or Other liabilities, respectively, in the balance sheets on a net basis where the Company has both a legal right of offset and the intention to settle the contracts on a net basis. The Company often enters into different types of derivative contracts with a single counterparty and these contracts are covered under netting agreements.

(2) The fair value movements in derivative assets and liabilities relating to modified coinsurance funds withheld contracts are included within the associated asset or liability at each period end on the face of the balance sheets. Notional amounts associated with reinsurance agreements under which the Company assumes reinsurance risk are recorded as asset derivative notional amounts. Notional amounts associated with the GreyCastle Life Retro Arrangements under which the Company cedes reinsurance risk are recorded as liability derivative notional amounts. Included in the liability derivative notional amount as of March 31, 2016 is the cumulative net realized and unrealized loss on life retrocession embedded derivative of $681.8 million.

(3) As of March 31, 2016, the Company held cash collateral related to foreign currency derivative positions and certain other derivative positions of $5.5 million for derivatives in an asset position and paid cash collateral of $4.2 million for derivatives in a liability position. As of December 31, 2015, the Company held cash collateral related to foreign currency derivative position and certain other derivative positions of $31.0 million for derivatives in an asset position and paid cash collateral of nil for derivatives in a liability position. The assets and liabilities related to the net collateral paid or held were recorded as Other assets and Other liabilities within the unaudited consolidated balance sheets as the collateral and derivative positions are not intended to be settled on a net basis.

(a) Derivative Instruments Designated as Fair Value Hedges

The Company may designate certain of its derivative instruments as fair value hedges or cash flow hedges and formally and contemporaneously documents all relationships between the hedging instruments and hedged items and links the hedging derivatives to specific assets and liabilities. The Company assesses the effectiveness of the hedge both at inception and on an on-going basis, and determines whether the hedge is highly effective in offsetting changes in fair value or cash flows of the linked hedged item.

The Company may use foreign exchange contracts to hedge the fair value of certain fixed income securities as well as to hedge certain net investments in foreign operations. For the three months ended March 31, 2016, there is no exposure to fair value hedges.

Settlement of Fair Value Hedges

A summary of the fair value hedges that have been settled and their impact on results during the indicated periods as well as the remaining balance of fair value hedges and average years remaining to maturity as of March 31, 2016 and 2015 are shown below:

Settlement of Fair Value Hedges - Summary	Fair Value Hedges - Deposit Liabilities March 31,
(U.S. dollars in thousands)	2016		2015
Cumulative reduction to interest expense	$	106,056	$	97,705
Remaining balance	127,139		135,490
Weighted average years remaining to maturity	21.2		22.2

(b) Derivative Instruments Designated as Hedges of the Net Investment in a Foreign Operation

The Company utilizes foreign exchange contracts to hedge the fair value of certain net investments in foreign operations. During the three months ended March 31, 2016 and 2015, the Company entered into foreign exchange contracts that were formally designated as hedges of investments in foreign subsidiaries, the majority of which have functional currencies of either U.K. sterling or the Euro. There was no ineffectiveness in these transactions.

The following table provides the weighted average U.S. dollar equivalent of foreign denominated net assets that were hedged and the resulting derivative gain (loss) that was recorded in the foreign currency translation adjustment, net of tax, account within AOCI for the three months ended March 31, 2016 and 2015:

Derivative Instruments Designated as Hedges of the Net Investment in a Foreign Operation - Summary	Three months ended March 31,
(U.S. dollars in thousands)	2016			2015
Weighted average of U.S. dollar equivalent of foreign denominated net assets	$	2,234,748		$	628,941
Derivative gains (losses) (1)	(11,515		)	66,770

____________

(1) Derivative gains (losses) from derivative instruments designated as hedges of the net investment in a foreign operation are recorded in the cumulative translation adjustment account within AOCI for each period.    

(c) Derivative Instruments Not Formally Designated As Hedging Instruments

The following table provides the total impact on earnings relating to derivative instruments not formally designated as hedging instruments under authoritative accounting guidance and from the ineffective portion of fair value hedges. The impacts are all recorded through Net realized and unrealized gains (losses) on derivatives in the income statement for the three months ended March 31, 2016 and 2015:

Net Realized and Unrealized Gains (Losses) on Derivative Instruments	Three months ended March 31,
(U.S. dollars in thousands)	2016			2015
Investment Related Derivatives:
Interest rate exposure	$	781		$	9,637
Foreign exchange exposure	(670		)	(1,362		)
Credit exposure	(163		)	82
Financial market exposure	(1,010		)	3,041
Other Non-Investment Derivatives:
Foreign exchange contracts	(1,181		)	2,059
Credit exposure	(303		)	1,346
Modified coinsurance funds withheld contract	(1,076		)	1,718
Net realized and unrealized gains (losses) on derivative instruments	$	(3,622	)	$	16,521
Net realized and unrealized gains (losses) on life retrocession embedded derivative and derivative instruments - Life Funds Withheld Assets	$	(236,080	)	$	(229,367	)

The Company’s objectives in using these derivatives are explained below.

(c)(i) Investment Related Derivatives

The Company, either directly or through its investment managers, may use derivative instruments within its investment portfolio, including interest rate swaps, inflation swaps, commodity contracts, total return swaps, credit derivatives (single name and index credit default swaps), options, forward contracts and financial futures (foreign exchange, bond and stock index futures), primarily as a means of economically hedging exposures to interest rate, credit spread, equity price changes and foreign currency risk or, in limited instances, for efficient portfolio management. When using cleared (exchange traded) derivatives, the Company is exposed to the credit risk of the applicable clearing house and of the Company's future commissions merchant. When using uncleared (over-the-counter) derivatives, the Company is exposed to credit risk in the event of non-performance by the counterparties under any derivative contracts, although the Company generally seeks to use credit support arrangements with counterparties to help manage this risk.

Investment Related Derivatives – Interest Rate Exposure

The Company utilizes risk management and overlay strategies that incorporate the use of derivative financial instruments, primarily to manage its fixed income portfolio duration and net economic exposure to interest rate risks. The Company may also use interest rate swaps to convert certain liabilities from a fixed rate to a variable rate of interest or to convert a variable rate of interest from one basis to another.

Investment Related Derivatives – Foreign Exchange Exposure

The Company has exposure to foreign currency exchange rate fluctuations through its operations and in its investment portfolio. The Company uses foreign exchange contracts to manage its exposure to the effects of fluctuating foreign currencies on the value of certain of its foreign currency fixed maturities. These contracts are not designated as specific hedges for financial reporting purposes and, therefore, realized and unrealized gains and losses on these contracts are recorded in income in the period in which they occur. These contracts generally have maturities of twelve months or less.

In addition, certain of the Company's investment managers may, subject to investment guidelines, enter into forward contracts.

Investment Related Derivatives – Credit Exposure

Credit derivatives may be purchased within the Company's investment portfolio in the form of single name, basket or index credit default swaps and swaptions, which are used to mitigate credit exposure through a reduction in credit spread duration (i.e., macro credit strategies rather than single-name credit hedging) or exposure to securities of selected issuers, including issuers that are not held in the underlying fixed income portfolio.

Investment Related Derivatives – Financial Market Exposure

Stock index futures may be purchased within the Company's investment portfolio in order to create synthetic equity exposure and to add value to the portfolio with overlay strategies where market inefficiencies are believed to exist. From time to time, the Company may enter into other financial market exposure derivative contracts on various indices including, but not limited to, inflation and commodity contracts.

(c)(ii) Other Non-Investment Derivatives

Foreign Exchange Contracts

On January 9, 2015, the Company entered into the FX Forwards with Morgan Stanley Capital Services LLC and Goldman Sachs International. The purpose of the FX Forwards was to mitigate risk of foreign currency exposure related to the Catlin Acquisition. Following the closing of the Catlin Acquisition, the FX Forwards were settled.

In connection with the Catlin Acquisition and the FX Forwards, during 2015, certain foreign exchange contracts utilized to hedge the fair value of certain net investments in foreign operations were de-designated as hedging instruments; subsequently during the second quarter, the hedging relationships were then re-established.

In the fourth quarter of 2015, the Company entered into an average rate option to mitigate the risk of foreign currency exposure to certain cash flows denominated in U.K. sterling. The option will mature in the fourth quarter of 2016. Additionally, the Company has a small forward purchase to mitigate exposure to certain cash flows denominated in New Zealand dollars.

Credit Exposure

During the year ended December 31, 2014, the Company entered into a non-investment related credit derivative relating to a number of reference pool mortgage tranches associated with actual mortgage loans that were securitized into agency mortgage-backed securities and sold as Structured Agency Credit Risk Notes. As of March 31, 2016, there was no reported event of default on this obligation. The credit derivative is recorded at fair value based upon models developed by the Company. Significant unobservable inputs considered in the valuation include the impact of changes in interest rates, future default, delinquency and prepayment rates, credit spreads, changes in credit quality, and other market factors.

Guaranteed Minimum Income Benefit Contract

The Company also has derivatives embedded in certain reinsurance contracts. For a certain life reinsurance contract, the Company pays the ceding company a fixed amount equal to the estimated present value of the excess of the guaranteed benefit over the account balance upon the policyholder's election to take the income benefit. The fair value of this derivative is determined based on the present value of expected cash flows.

Modified Coinsurance and Funds Withheld Contracts

The Company has modified coinsurance and funds withheld reinsurance agreements that provide for a return to be paid to the Company based on a portfolio of fixed income securities. As such, the agreements contain an embedded derivative. The embedded derivative is bifurcated from the funds withheld balance and recorded at fair value with changes in fair value recognized in earnings through Net realized and unrealized gains (losses) on derivative instruments.

Modified Coinsurance Funds Withheld Reinsurance Agreements - Life Retrocession Embedded Derivative

In addition, the Company has entered into GreyCastle Life Retro Arrangements, as described in Note 1, "Basis of Preparation and Consolidation." The embedded derivative related to the GreyCastle Life Retro Arrangements is recorded at fair value with changes in fair value recognized in earnings through Net realized and unrealized gains (losses) on life retrocession embedded derivative and derivative instruments - Life Funds Withheld Assets.

The impact of the GreyCastle Life Retro Arrangements on the Company's results was as follows:

Impact of GreyCastle Life Retro Arrangements	Three months ended March 31,
(U.S. dollars in thousands)	2016			2015
Underwriting profit (loss) (1)	$	—		$	603
Net investment income - Life Funds Withheld Assets	41,560			50,419
Net realized gains (losses) on investments sold - Life Funds Withheld Assets	34,416			52,738
Net unrealized gains (losses) on investments, Trading - Life Funds Withheld Assets	69,096			760
OTTI on investments - Life Funds Withheld Assets	(2,346		)	(5,209		)
Exchange gains (losses)	11,119			3,684
Other income and expenses	(146		)	(1,298		)
Net realized and unrealized gains (losses) on life retrocession embedded derivative and derivative instruments - Life Funds Withheld Assets	(236,080		)	(229,367		)
Net income (loss)	$	(82,381	)	$	(127,670	)
Change in net unrealized gains (losses) on investments - Life Funds Withheld Assets, net of tax	51,990			37,115
Change in adjustments related to future policy benefit reserves, net of tax	17,035			60,356
Change in cumulative translation adjustment - Life Funds Withheld Assets, net of tax	13,356			30,802
Total changes to other comprehensive income as a result of GreyCastle Life Retro Arrangements	$	82,381		$	128,273
Comprehensive income (loss)	$	—		$	603

____________

(1) The underwriting profit of $0.6 million relates to a premium adjustment during the three months ended March 31, 2015 relating to the GreyCastle Life Retro Arrangements transaction. Excluding this transaction, the impact to comprehensive income relating to the GreyCastle Life Retro Arrangements was nil for the three months ended March 31, 2015.

As shown in the table above, although the Company's net income (loss) is subject to variability related to the GreyCasstle Life Retro Arrangements, there is minimal net impact on the Company's comprehensive income in any period. The life retrocession embedded derivative value includes the interest income, unrealized gains and losses, and realized gains and losses from sales on the Life Funds Withheld Assets.

The change in the value of the life retrocession embedded derivative includes the interest income, realized and unrealized gains and losses on Life Funds Withheld Assets and certain related expenses are as follows:

Components of Life Retrocession Embedded Derivative and Derivative Instruments - Life Funds Withheld Assets:	Three months ended March 31,
(U.S. dollars in thousands)	2016			2015
Interest income - Life Funds Withheld Assets	$	(43,110	)	$	(50,996	)
Realized and unrealized gains (losses) - Life Funds Withheld Assets	(174,932		)	(152,830		)
Other	146			96
Net realized and unrealized gains (losses) on life retrocession embedded derivative	$	(217,896	)	$	(203,730	)
Net adjustments related to future policy benefit reserves, net of tax	(22,053		)	(11,954		)
Net realized and unrealized gains (losses) on derivative instruments - Life Funds Withheld Assets	3,869			(13,683		)
Net realized and unrealized gains (losses) on life retrocession embedded derivative and derivative instruments - Life Funds Withheld Assets	$	(236,080	)	$	(229,367	)

(d) Contingent Credit Features

Certain derivative agreements entered into by the Company or its subsidiaries contain credit rating downgrade provisions that permit early termination of the agreements by the counterparty if collateral is not posted following failure to maintain certain credit ratings from one or more of the principal credit rating agencies. If the Company were required to terminate such agreements early due to a credit rating downgrade, it could potentially be in a net liability position at the time of settlement of such agreements. The aggregate fair value of all derivative agreements containing such rating downgrade provisions that were in a liability position and any collateral posted under these agreements as of March 31, 2016 and December 31, 2015 were as follows:

Contingent Credit Features - Summary: (U.S. dollars in thousands)	March 31, 2016		December 31, 2015
Aggregate fair value of derivative agreements with downgrade provisions in a net liability position	$	19,038	$	5,827
Collateral posted to counterparty	$	600	$	—

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Goodwill and Other Intangible Assets

3 Months Ended

Mar. 31, 2016

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and other Intangible Assets

Goodwill and Other Intangible Assets

The Company has goodwill and intangible assets of $2.2 billion at March 31, 2016 and December 31, 2015.

In the first quarter of 2016, as a result of the transaction described in Note 3(a), "Acquisitions and Disposals - Allied Acquisition," the Company recognized additional intangible assets of $14.0 million. The transaction was accounted for using the acquisition method under which the Company recorded the identifiable assets acquired, including indefinite-lived and definite-lived intangible assets, and liabilities assumed, at their Acquisition Date fair values, and recorded the excess of consideration transferred over the net assets acquired as goodwill in the amount of $13.9 million.

In the third quarter of 2015, as a result of the transaction described in Note 3(b), "Acquisitions and Disposals - New Energy Risk," the Company recognized additional goodwill of approximately $13.4 million. The transaction was accounted for using the acquisition method under which the Company recorded the identifiable assets acquired and liabilities assumed at their acquisition date fair values, and recorded as goodwill the excess of the sum of a) over b) - in which a) represents the aggregate of: i) the consideration transferred, ii) the fair value of noncontrolling interest in the acquiree, and iii) the acquisition-date fair value of the Company's previously held equity interest in the acquiree; and b) represents the net assets acquired in the transaction.

In the second quarter of 2015, as a result of the transaction described in Item 8, Note 3(c), "Acquisitions and Disposals - Catlin Acquisition," to the Consolidated Financial Statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2015, the Company recognized additional intangible assets of $988.0 million. The transaction was accounted for using the acquisition method under which the Company recorded the identifiable assets acquired, including indefinite-lived and definite-lived intangible assets, and liabilities assumed, at their Acquisition Date fair values, and recorded the excess of consideration transferred over the net assets acquired as goodwill in the amount of $794.0 million.

The following table presents an analysis of intangible assets broken down between goodwill, intangible assets with an indefinite life and intangible assets with a definite life for the three months ended March 31, 2016:

(U.S. dollars in thousands)	Goodwill		Intangible assets with an indefinite life		Intangible assets with a definite life			Total
Balance at December 31, 2015	$	1,213,630	$	682,859	$	313,777		$	2,210,266
Additions	13,946		8,000		6,000			27,946
Amortization	—		—		(5,588		)	(5,588		)
Foreign Currency Translation	1,496		1,701		(2,224		)	973
Balance at March 31, 2016	$	1,229,072	$	692,560	$	311,965		$	2,233,597

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Share Capital

3 Months Ended

Mar. 31, 2016

Stockholders' Equity Note [Abstract]

Share Capital

Share Capital

(a) Authorized and Issued

Buybacks of Ordinary Shares

On August 6, 2015, XL-Ireland announced that its Board of Directors approved a share buyback program, authorizing the purchase of up to $1.0 billion of ordinary shares (the "August 2015 Program"). During the three months endedMarch 31, 2016, the Company purchased and canceled 10.0 million ordinary shares under the August 2015 Program for $355.1 million. As of March 31, 2016, $348.2 million remained available for purchase under the August 2015 Program.

(b) Stock Plans

The Company's performance incentive programs provide for grants of stock options, restricted stock, equity-classed restricted stock units, liability-classed restricted stock units, performance units and stock appreciation rights. Share-based compensation granted by the Company generally contains a vesting period of three or four years, and certain awards also contain performance conditions. The Company records compensation expense related to each award over its vesting period, incorporating the best estimate of the expected outcome of performance conditions where applicable. Compensation expense is generally recorded on a straight line basis over the vesting period of an award. See Item 8, Note 18, "Share Capital," to the Consolidated Financial Statements included in the Company's Annual Report on Form 10-K for the year ended December 31, 2015 for further information on the Company's performance incentive programs and associated accounting.

During the three months ended March 31, 2016, the Company granted approximately 2.2 million stock options with a weighted-average grant date fair value of $5.99 per option. The fair value of the options issued was estimated on the date of grant using the Black-Scholes option pricing model using the following weighted average assumptions:

Dividend yield	2.00	%
Risk free interest rate	1.37	%
Volatility	21.7	%
Expected lives	6.0 years

During the three months ended March 31, 2016, the Company granted approximately 1.1 million equity-classed restricted stock units to certain employees with an aggregate grant date fair value of approximately $38.3 million. Each equity-classed restricted stock unit represents the Company's obligation to deliver to the holder one ordinary share, and grants may vest in three or four equal installments upon the first, second, third and fourth anniversaries of the date of grant. Equity-classed restricted stock units are granted at the closing market price on the day of grant and entitle the holder to receive dividends declared and paid in the form of additional ordinary shares contingent upon vesting.

During the three months ended March 31, 2016, the Company granted approximately 1.8 million liability-classed cash units to certain employees with an aggregate grant date fair value of approximately $61.3 million. Each liability-classed restricted cash unit represents the Company's obligation to deliver to the holder a cash payment equivalent to the value of one ordinary share. The grants may vest either in three or four equal installments upon the first, second, third and fourth anniversaries of the date of grant. Liability-classed restricted stock units are granted at the closing market price on the day of grant and entitle the holder to receive dividends declared and are paid in cash contingent upon vesting.

During the three months ended March 31, 2016, the Company granted approximately 0.7 million performance units (representing a potential maximum share payout of approximately 1.5 million ordinary shares) to certain employees with an aggregate grant date fair value of approximately $25.6 million. Each grant of performance units has a target number of shares, with final payouts ranging from 0% to 200% of the grant amount depending upon the achievement of stated relative and absolute financial performance metrics along with each employee's continued service through the vesting date. Performance units granted in the current year are granted at the closing market price on the day of grant and entitle the holder to receive dividends declared and paid in the form of additional ordinary shares contingent upon vesting. Performance units issued in 2015 had different performance metrics, please see Item 8, Note 18, "Share Capital," to the Consolidated Financial Statements included in the Company's Annual Report on Form 10-K for the year ended December 31, 2015.

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Notes Payable and Debt and Financing Arrangements

3 Months Ended

Mar. 31, 2016

Debt Disclosure [Abstract]

Notes Payable and Debt and Financing Arrangements

Notes Payable and Debt and Financing Arrangements

(a) Notes Payable and Debt

The following table presents the Company's outstanding notes payable and debt at March 31, 2016 and December 31, 2015:

(U.S. dollars in thousands)	March 31, 2016				December 31, 2015
	Commitment/ Debt (1)		In Use/ Outstanding (2)		Commitment/ Debt (1)		In Use/ Outstanding (2)
Debt:
2.30% Senior Notes due 2018	$	300,000	$	298,183	$	300,000	$	298,015
5.75% Senior Notes due 2021	400,000		397,630		400,000		397,523
6.375% Senior Notes due 2024	350,000		349,057		350,000		349,029
4.45% Subordinated Notes due 2025	500,000		492,723		500,000		492,521
6.25% Senior Notes due 2027	325,000		323,257		325,000		323,218
Trust Preferred Securities, face amount $8m, due 2035	8,248		8,248		—		—
5.25% Senior Notes due 2043	300,000		296,328		300,000		296,294
5.5% Subordinated Notes due 2045	500,000		488,469		500,000		488,370
Total debt carrying value	$	2,683,248	$	2,653,895	$	2,675,000	$	2,644,970

_______________

(1) Excluded from the table are certain credit facilities under which the Company is permitted to utilize up to $1.4 billion at March 31, 2016 and December 31, 2015, respectively, for revolving loans to support general operating and financing needs. However, at March 31, 2016 and December 31, 2015, $526.5 million and $527.1 million, respectively, were utilized under these facilities to issue letters of credit, leaving $823.5 million and $822.9 million, respectively, available to support other operating and financing needs.

(2)    "In Use/Outstanding" data represent March 31, 2016 and December 31, 2015 accreted values.

With the exception of the trust preferred securities assumed as a result of the Allied Acquisition, as described below, all outstanding debt of the Company at March 31, 2016 and December 31, 2015 was issued by XL-Cayman, a 100% owned subsidiary of XL-Ireland. XL-Ireland does not have significant assets or operations independent of XL-Cayman. XL-Cayman's outstanding debt is fully and unconditionally guaranteed by XL-Ireland. The ability of XL-Cayman, like that of the Company, to obtain funds from its subsidiaries to satisfy any of its obligations, including under guarantees, is subject to certain contractual restrictions, applicable laws and statutory requirements of the various countries in which the subsidiaries operate, including, among others, Bermuda, the United States, Ireland, Switzerland and the United Kingdom. For details of the required statutory capital and surplus for the principal operating subsidiaries of the Company, see Item 8, Note 23, "Statutory Financial Data," to the Consolidated Financial Statements included in the Company's Annual Report on Form 10-K for the year ended December 31, 2015.

On March 30, 2015, XL-Cayman issued $500 million of subordinated notes due March 2025, with a fixed coupon of 4.45%, that are guaranteed by XL-Ireland. The notes are listed on the New York Stock Exchange. The notes were issued at 99.633% of the face amount and net proceeds were $492.2 million. Related expenses of the offering amounted to approximately $5.9 million. These costs were deferred and will be amortized over the term of the subordinated notes.

On March 30, 2015, XL-Cayman issued $500 million of subordinated notes due March 2045, with a fixed coupon of 5.5%, that are guaranteed by XL-Ireland. The notes are listed on the New York Stock Exchange. The notes were issued at 99.115% of the face amount and net proceeds were $488.4 million. Related expenses of the offering amounted to approximately $7.2 million. These costs were deferred and will be amortized over the term of the subordinated notes.

As a result of the Allied Acquisition described in Note 3(a), "Acquisitions and Disposals - Allied Acquisition," the Company assumed $8.2 million of trust preferred securities, due in 2035 and bearing a floating interest rate, adjustable quarterly, at three-month LIBOR plus 3.75%. The Company has given notice that these securities will be retired at the next interest payment date on June 15, 2016.

XL-Cayman and the Company were in compliance with all covenants at March 31, 2016, and XL-Cayman and the Company currently remain in compliance with all covenants.

(b) Letter of Credit Facilities and Other Sources of Collateral

The Company has letter of credit facilities provided on both syndicated and bilateral bases from commercial banks. These facilities are utilized primarily to support non-admitted insurance and reinsurance operations in the U.S. and capital requirements at Lloyd’s.

The Company’s letter of credit facilities and revolving credit facilities as of March 31, 2016 and December 31, 2015 were as follows:

Letter of Credit Summary: (U.S. dollars in thousands except percentages)	March 31, 2016 (1)			December 31, 2015 (1)
Available letter of credit facilities - commitments	$	4,503,617		$	4,463,041
Available letter of credit facilities - in use (2)	$	2,548,085		$	2,515,653
Collateralized by certain assets of the Company’s investment portfolio	51.3		%	50.9		%

____________

(1) As of March 31, 2016 and December 31, 2015, there were fifteen available credit facilities

(2) As of March 31, 2016 and December 31, 2015 the stated portion of allowable credit facilities permitted to be utilized for revolving loans was $1.4 billion. However, as of March 31, 2016 and December 31, 2015, $526.5 million and $527.1 million, respectively, of such facilities' limits were utilized to issue letters of credit, leaving $823.5 million and $822.9 million, respectively, available either to issue additional letters of credit or to support other operating or financing needs under these particular facilities.

For details regarding the facilities, see Item 8, Note 14(b), "Notes Payable and Debt and Financing Arrangements - Letter of Credit Facilities and Other Sources of Collateral," to the Consolidated Financial Statements included in our Annual Report on Form 10-K for the year ended December 31, 2015.

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Related Party Transactions

3 Months Ended

Mar. 31, 2016

Related Party Transactions [Abstract]

Related Party Transactions

Related Party Transactions

(a)    Investment Manager Affiliates

At March 31, 2016 and 2015, the Company owned minority stakes in six independent investment management companies ("Investment Manager Affiliates") that are actively managing client capital and seeking growth opportunities. The Company seeks to develop relationships with specialty investment management organizations, generally acquiring an equity interest in the business. The Company also invests in certain of the funds and limited partnerships and other legal entities managed by these affiliates and through these funds and partnerships pays management and performance fees to the Company's Investment Manager Affiliates. In addition, the company owned minority stakes in two independent firms as of March 31, 2016 and one independent firm as of March 31, 2015, that provide technology and other services to alternative asset managers and allocators. The results of the Company's interests in these enterprises are included in Investment Manager Affiliates. The Company pays fees to these Investment Manager Affiliates in exchange for them providing their services to the Company. See Item 8, Note 7, "Investments in Affiliates," to the Consolidated Financial Statements included in our Annual Report on Form 10-K for the year ended December 31, 2015.

(b)    Assumed Reinsurance Contracts

In the normal course of business, the Company enters into assumed reinsurance contracts with certain of its other strategic affiliates, or their subsidiaries. Management believes that these transactions are conducted at market rates consistent with negotiated arm's-length contracts. During the three months ended March 31, 2016 and 2015, these contracts resulted in reported net premiums, reported net losses, and reported net acquisition costs as summarized below:

(U.S. dollars in thousands)	Three months ended March 31,
	2016		2015
Reported net premiums	$	24,016	$	27,076
Reported net losses	$	12,060	$	9,100
Reported net acquisition costs	$	11,604	$	9,012

Results through April 1, 2015 include amounts under an assumed reinsurance contract with a wholly-owned subsidiary of ARX, an insurance operating affiliate of the Company to that date. The Company disposed of its investment in ARX on April 1, 2015, and thus, after that date, all amounts under this contract are no longer reported as related party transactions. See Note 3(d), "Acquisitions and Disposals - Sale of Strategic Operating Affiliate."

(c)    New Ocean

Commencing in 2014, several of the Company’s wholly-owned subsidiaries retrocede assumed reinsurance business to special purpose reinsurers that receive capital from funds managed by the Company's subsidiary, New Ocean Capital Management Limited, a Bermuda based company ("New Ocean"), as discussed in Note 12, "Variable Interest Entities". Underwriting administration services are provided to the special purpose reinsurers by other subsidiaries of the Company under service fee agreements negotiated at arm's-length, while investment advisory services are provided by New Ocean. During the three months endedMarch 31, 2016, ceded premiums earned, ceded losses and loss expenses incurred, ceding commission income, and other fee income related to these retrocessional contracts were not material to the Company.

(d)    New Energy

On July 24, 2015, as described in Note 3(b), "Acquisitions and Disposals - New Energy Risk," the Company completed its acquisition of an additional 63.63% of the shares of New Energy for approximately $8.8 million, increasing its ownership of the entity to a majority portion of 94.79%. These shares are held within the XL Innovate Fund. A substantial portion of the additional shares were purchased directly from the family trusts of a Company employee, based on a market valuation of New Energy performed by an independent third party provider. The remaining 5.21% of equity shares of New Energy held by the family trusts of the employee were then contributed in-kind to XL Innovate Fund based on the share price implied by the independent valuation. Such contribution was made in partial satisfaction of the employee's aggregate 5.21% investment commitment to the Fund and resulted in XL Innovate Fund owning 100% of the net equity of New Energy, and the family trusts of the employee owning a 5.21% non-controlling equity interest in XL Innovate Fund. The employee serves as a member of the board of directors of both New Energy and XL Innovate Fund, and maintains responsibility over the business generated by New Energy. There were no other material transactions between the Company and this employee for the three months endedMarch 31, 2016.

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Variable Interest Entities

3 Months Ended

Mar. 31, 2016

Variable Interest Entities Disclosure [Abstract]

Variable Interest Entities

Variable Interest Entities

At times, the Company has utilized VIEs both indirectly and directly in the ordinary course of the Company's business. Within its investment portfolio, the Company has holdings in hedge funds, private equity and other investment vehicles. A number of these vehicles are considered VIEs based on their legal form and the generally passive role of their investors.  As the Company lacks the ability to control the activities which most significantly impact the economic performance of these VIEs, the Company is not considered the primary beneficiary and does not consolidate these entities. The activities of the entities are generally limited to holding investments. The exposure to loss from these investments is limited to the carrying value of the investments at the balance sheet date.

During the third quarter of 2013, the Company, along with other investors, formed New Ocean to act as an investment manager focused on providing third-party investors access to insurance-linked securities and other insurance and reinsurance capital markets products. The Company holds a majority voting interest in New Ocean through its ownership of common shares and, accordingly, the financial statements of New Ocean have been included in the consolidated financial statements of the Company. None of the assets, liabilities, revenues or net income of New Ocean were material to the Company during the three months endedMarch 31, 2016. The equity interest attributable to third party investors in New Ocean recorded in the Company’s Unaudited Consolidated Balance Sheets as "Non-controlling interest in equity of consolidated subsidiaries" was $0.7 million and $0.4 million as of March 31, 2016 and December 31, 2015, respectively.

During the fourth quarter of 2013, the Company, along with other investors, invested in a new Bermuda-based company, New Ocean Focus Cat Fund Ltd. ("New Ocean FCFL"), which is considered a VIE under GAAP. During the second quarter of 2014, the Company formed another new Bermuda-based investment company, New Ocean Market Value Cat Fund, Ltd. ("New Ocean MVCFL"), which is also considered a VIE under GAAP. New Ocean MVCFL primarily invests in insurance-linked securities, with a current focus on catastrophe bonds.

During the year ended December 31, 2014, New Ocean FCFL invested in a special purpose Bermuda reinsurer, Vector Reinsurance Ltd ("Vector Re"), formed for the purpose of underwriting collateralized excess of loss reinsurance with a focus on global property catastrophe risks. During the first quarter of 2015, New Ocean MVCFL also invested in Vector Re. Most of Vector Re’s current underwriting activity relates to reinsurance business assumed from the Company's subsidiaries. Underwriting administration and claims services are provided to Vector Re by the Company under service fee contracts, while investment advisory services are provided by New Ocean.

The Company currently holds majority equity interests, which are considered to be the controlling financial interests, in New Ocean FCFL and New Ocean MVCFL, and by extension, Vector Re. Accordingly, included in the consolidated financial statements of the Company are the total net assets of New Ocean FCFL, New Ocean MVCFL and Vector Re of $178.5 million and $175.8 million as of March 31, 2016 and December 31, 2015, respectively. The Company’s shares of revenue and net income in these VIEs were not material to the Company for the three months endedMarch 31, 2016. All inter-company transactions between the Company's entities have been eliminated in consolidation. The equity interest attributable to third party investors in New Ocean FCFL, New Ocean MVCFL and Vector Re that was recorded in the Company’s Consolidated Balance Sheets as "Non-controlling interest in equity of consolidated subsidiaries" was $71.2 million and $70.5 million as of March 31, 2016 and December 31, 2015, respectively.

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Computation of Earnings Per Ordinary Share and Ordinary Share Equivalent

3 Months Ended

Mar. 31, 2016

Earnings Per Share [Abstract]

Computation of Earnings Per Ordinary Share and Ordinary Share Equivalent

Computation of Earnings Per Ordinary Share and Ordinary Share Equivalent

The following table sets forth the computation of basic and diluted earnings per ordinary share for the three months ended March 31, 2016 and 2015:

	Three Months Ended March 31,
(In thousands, except per share amounts)	2016		2015
Basic earnings per ordinary share & ordinary share equivalents outstanding:
Net income (loss) attributable to ordinary shareholders	$	21,885	$	36,281
Weighted average ordinary shares outstanding, in thousands - basic	291,969		255,724
Basic earnings per ordinary share & ordinary share equivalents outstanding	$	0.07	$	0.14
Diluted earnings per ordinary share & ordinary share equivalents outstanding:
Weighted average ordinary shares outstanding - basic	291,969		255,724
Impact of share-based compensation	4,697		4,980
Weighted average ordinary shares outstanding - diluted	296,666		260,704
Diluted earnings per ordinary share & ordinary share equivalents outstanding	$	0.07	$	0.14
Dividends per ordinary share	$	0.20	$	0.16

For the three months ended March 31, 2016 and 2015, ordinary shares available for issuance under share-based compensation plans of 6.0 million and 5.0 million, respectively, were not included in the calculation of diluted earnings per ordinary share because the assumed exercise or issuance of such shares would be anti-dilutive.

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Commitments and Contingencies

3 Months Ended

Mar. 31, 2016

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

Commitments and Contingencies

(a) Financial Guarantee Exposures

The Company's outstanding financial guarantee contracts as of March 31, 2016 provide credit support for a variety of collateral types with the exposures comprised of an aggregate amount of $80.8 million notional financial guarantee on two notes backed by zero coupon long dated bonds and bank perpetual securities, including some issued by European financial institutions. As of March 31, 2016 and December 31, 2015, the total gross claim liability recorded was nil and the contracts had a weighted average contractual term to maturity of 23.9 years and 24.2 years, respectively.

Surveillance procedures to track and monitor credit deteriorations in the insured financial obligations are performed by the primary obligors for each transaction on the Company's behalf. Information regarding the performance status and updated exposure values is provided to the Company on a quarterly basis and evaluated by management in recording claims reserves. As of March 31, 2016, there were no reported events of default on these obligations.

(b) Litigation

The Company and its subsidiaries are subject to litigation and arbitration in the normal course of business. These lawsuits and arbitrations principally involve claims on policies of insurance and contracts of reinsurance and are typical for the Company and for the property and casualty insurance and reinsurance industry in general. Such claims proceedings are considered in connection with the Company's loss and loss expense reserves. Reserves in varying amounts may or may not be established in respect of particular claims proceedings based on many factors, including the legal merits thereof. In addition to litigation relating to insurance and reinsurance claims, the Company and its subsidiaries are subject to lawsuits and regulatory actions in the normal course of business that do not arise from or directly relate to claims on insurance or reinsurance policies. This category of business litigation typically involves, among other things, allegations of underwriting errors or misconduct, employment claims, regulatory activity, shareholder disputes or disputes arising from business ventures. The status of these legal actions is actively monitored by management.

Legal actions are subject to inherent uncertainties, and future events could change management's assessment of the probability or estimated amount of potential losses from pending or threatened legal actions. Based on available information, it is the opinion of management that the ultimate resolution of pending or threatened legal actions other than claims proceedings, both individually and in the aggregate, will not result in losses having a material adverse effect on the Company's financial position or liquidity as of March 31, 2016.

If management believes that, based on available information, it is at least reasonably possible that a material loss (or additional material loss in excess of any accrual) will be incurred in connection with any legal actions other than claims proceedings, the Company discloses an estimate of the possible loss or range of loss, either individually or in the aggregate, as appropriate, if such an estimate can be made, or discloses that an estimate cannot be made. Based on the Company's assessment as of March 31, 2016, no such disclosures were considered necessary.

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Accumulated Other Comprehensive Income (Loss)

3 Months Ended

Mar. 31, 2016

Comprehensive Income Loss Note [Abstract]

Accumulated Other Comprehensive Income (Loss)

Accumulated Other Comprehensive Income (Loss)

The changes in AOCI, net of tax, by component for the three months ended March 31, 2016 and 2015 are as follows:

Three months ended March 31, 2016 (U.S. dollars in thousands)	Unrealized Gains (Losses) on Investments (1)			OTTI Losses Recognized in AOCI			Foreign Currency Translation Adjustments			Underfunded Pension Liability			Cash Flow Hedge			Total
Balance, beginning of period, net of tax	$	803,094		$	(57,502	)	$	(36,503	)	$	(24,641	)	$	2,168		$	686,616
OCI before reclassifications	575,022			—			(15,416		)	(1,049		)	—			558,557
Amounts reclassified from AOCI	(117,114		)	2,311			—			—			(39		)	(114,842		)
Tax benefit (expense)	(34,707		)	(44		)	(1,023		)	—			—			(35,774		)
Net current period OCI - net of tax	423,201			2,267			(16,439		)	(1,049		)	(39		)	407,941
Balance, end of period, net of tax	$	1,226,295		$	(55,235	)	$	(52,942	)	$	(25,690	)	$	2,129		$	1,094,557
Three months ended March 31, 2015 (U.S. dollars in thousands)
Balance, beginning of period, net of tax	$	1,590,114		$	(76,047	)	$	(11,188	)	$	(20,789	)	$	2,368		$	1,484,458
OCI before reclassifications	254,267			—			32,404			975			—			287,646
Amounts reclassified from AOCI	(74,781		)	9,936			—			—			95			(64,750		)
Tax benefit (expense)	(5,805		)	(78		)	3,699			—			—			(2,184		)
Net current period OCI - net of tax	173,681			9,858			36,103			975			95			220,712
Balance, end of period, net of tax	$	1,763,795		$	(66,189	)	$	24,915		$	(19,814	)	$	2,463		$	1,705,170

____________

(1) For certain annuity contracts that are subject to the GreyCastle Life Retro Arrangements, policy benefit reserves were historically increased for the impact of changes in unrealized gains on investments supporting such contracts as if the gains had been realized, with a corresponding entry to other comprehensive income ("Shadow Adjustments"). As of December 31, 2015, the cumulative impact of the Shadow Adjustments was $274.4 million. During the three months ended March 31, 2016, net movements of $(17.0) million were recorded, resulting in a total cumulative net impact of Shadow Adjustments on future policy benefit reserves of $257.4 million as of March 31, 2016.

The reclassifications out of AOCI along with the associated income statement line items affected by component, and the total related tax (expense) benefit for the three months ended March 31, 2016 and 2015 are as follows:

Gross Amount Reclassified From AOCI
Details About AOCI Components (U.S. dollars in thousands)	Three months ended March 31, 2016			Three months ended March 31, 2015			Affected Line Item in the Statement of Income
Unrealized gains and losses on investments:
	$	(116,988	)	$	(78,551	)	Net realized gains (losses) on investments sold and net unrealized gains (losses) on investments Trading
	21,928			15,724			OTTI on investments
	$	(22,054	)	$	(11,954	)	Net realized and unrealized gains (losses) on life retrocession embedded derivative and derivative instruments - Life Funds Withheld Assets
	$	(117,114	)	$	(74,781	)	Total before tax
	1,577			87			Provision (benefit) for income tax
	$	(115,537	)	$	(74,694	)	Net of tax
OTTI losses recognized in OCI:
	$	2,313		$	9,875		Net realized gains (losses) on investments sold
	(2		)	61			OTTI on investments transferred to (from) OCI
	$	2,311		$	9,936		Total before tax
	(44		)	(3		)	Provision (benefit) for income tax
	$	2,267		$	9,933		Net of tax
Gains and losses on cash flow hedges:
Interest rate contracts	$	(39	)	$	95		Interest Expense
	—			—			Provision (benefit) for income tax
	$	(39	)	$	95		Net of tax
Total reclassifications for the period, gross of tax	$	(114,842	)	$	(64,750	)
Tax benefit (expense)	1,533			84
Total reclassifications for the period, net of tax	$	(113,309	)	$	(64,666	)

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Significant Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2016

Accounting Policies [Abstract]

Recent accounting pronouncements

Recent Accounting Pronouncements

In January 2016, the Financial Accounting Standards Board ("FASB") issued an accounting standards update concerning the accounting for financial instruments. The guidance retains the basic existing framework for accounting for financial instruments under GAAP, while achieving limited convergence with IFRS in this area. The guidance: (1) requires equity investments (except consolidated entities and those accounted for under the equity method of accounting) to be measured at fair value with changes in fair value recognized in net income, although equity instruments without a readily determinable fair value may be measured at cost less impairment with an adjustment for observable price changes; (2) simplifies the impairment assessment of equity investments without readily determinable fair values by requiring a qualitative assessment to identify impairment; (3) eliminates the requirement to disclose the fair value of financial instruments measured at amortized cost for non-public business entities; (4) eliminates the requirement to disclose the method(s) and significant assumptions used to estimate the fair value of financial instruments measured at amortized cost on the balance sheet; (5) requires public business entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes; (6) requires an entity to present separately in other comprehensive income the portion of the total change in the fair value of a liability resulting from a change in the instrument-specific credit risk when the entity has elected to measure the liability at fair value in accordance with the fair value option for financial statements; (7) requires separate presentation of financial assets and financial liabilities by measurement category and form of asset in the financial statements; and (8) clarifies that an entity should evaluate the need for a valuation allowance on a deferred tax asset related to available for sale securities in combination with the entity's other deferred tax assets. The guidance will be effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. Early adoption is permitted only for the amendment relating to presentation of the change in the fair value of a liability resulting from a change in instrument-specific credit risk and should be applied as of the beginning of the fiscal year of adoption. All of the amendments from this update should be applied by means of a cumulative effect adjustment to the balance sheet as of the beginning of the fiscal year of adoption, except the amendments related to impairment of equity securities without readily determinable fair values. The Company is currently evaluating the impact of this guidance, but expects that it will have an effect on results of operations as mark to market movements will prospectively impact net income. The Company does not expect this new guidance to have a material impact on the Company's financial condition or cash flows.

In February 2016, the FASB issued an accounting standards update concerning the accounting for leases. The most significant change to existing GAAP created by this standard will be the lessee recognition of lease assets and lease liabilities for those leases classified as operating. The core principle of this guidance stipulates that a lessee should recognize in the statement of financial position, initially measured at the present value of the lease payments, both a liability for contractual payments due under the lease, and an asset representing its right to use the underlying leased asset for the lease term ("right-of-use asset"). For financing leases, interest on the lease liability should be recognized separately from the amortization of the right-of-use asset in the statement of comprehensive income. Additionally, as regards the presentation of financing lease activities within the statement of cash flows, repayments of the principal portion of the lease liability should be classified within financing activities, while payments of interest on the lease liability should be classified within operating activities. For operating leases, a single net lease cost should be recognized over the lease term, generally on a straight-line basis, and all cash payments related to the lease should be classified within operating activities in the statement of cash flows. For leases with a term of 12 months or less, a lessee is permitted to make an accounting policy election by class of underlying asset not to recognize lease assets and lease liabilities, and therefore recognize lease expense for such leases on a straight-line basis over the lease term. The guidance will be effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early adoption is permitted. In transition, lessees and lessors are required to recognize and measure leases at the beginning of the earliest period presented using a modified retrospective approach, which includes a number of optional practical expedients that entities may elect to apply. An entity that elects to apply the practical expedients will substantively continue to account for leases that commence before the effective date in accordance with existing GAAP, except that a right-of-use asset and a lease liability must be recorded for all operating leases at each reporting date based on the present value of the remaining minimum rental payments that were previously tracked and disclosed. The Company is currently evaluating the impact of this guidance, but expects that it will have an effect on the Company's financial condition as new assets and liabilities related to operating leases are likely to be recorded as a result of adoption. The Company does not expect this new guidance to have a material impact on the Company's results of operations or cash flows.

In March 2016, the FASB issued an accounting standards update concerning the accounting for equity method investments. The amendments in this update require that when an investment qualifies for use of the equity method as a result of an increase in the level of ownership interest or degree of influence, the equity method investor add the cost of acquiring the additional interest in the investee to the current basis of the investor's previously held interest and adopt the equity method of accounting as of that date. Additionally, if the investment was previously accounted for as an available-for sale security, an entity also shall immediately recognize through earnings the unrealized holding gain or loss in accumulated other comprehensive income (“AOCI”) as of that date. Thus, this new treatment is eliminating existing GAAP rules requiring retroactive adjustment of an entity’s investments, results of operations and retained earnings when an existing investment qualifies for the equity method of accounting. The guidance will be effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2016, and should be applied prospectively upon their effective date. Early adoption is permitted. The Company is currently evaluating the impact of this guidance, but does not expect this new guidance to have a material impact on the Company's financial condition, results of operations or cash flows.

In March 2016 as part of its simplification initiative, the FASB issued an accounting standards update concerning the accounting for several aspects of employee share-based payment awards including: income tax consequences, classification of awards as either equity or liabilities, classification of items in the statement of cash flows, and certain expedients that entities can now elect regarding estimates and assumptions in this area. Regarding the accounting for income taxes, all excess tax benefits and tax deficiencies, including tax benefits of dividends on share-based payment awards, should be recognized as income tax expense or benefit (regardless of whether the benefit reduces taxes payable in the current period) in the income statement, as opposed to additional paid-in capital as current GAAP prescribes. The tax effects of exercised or vested awards should be treated as discrete items in the reporting period in which they occur. Regarding the classification of awards, the update changes the threshold to qualify for equity classification from the employer's minimum statutory withholding requirements to the maximum statutory tax rates in the applicable jurisdictions. Regarding the classification of cash flows, excess tax benefits should be classified along with other income tax cash flows as an operating activity, while cash paid by an employer when directly withholding shares for tax-withholding purposes should be classified as a financing activity. As regards new expedients which can be elected related to estimates and assumptions in this area of accounting, the only one allowable for public business entities is that they may now make an entity-wide accounting policy election to either estimate the number of share-based payment awards that are expected to vest (which is current GAAP) or account for forfeitures as they occur. The guidance will be effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2016 with early adoption permitted so long as all the amendments in the update are adopted in the same period. The amendments within the guidance related to the recognition of excess tax benefits and tax deficiencies in the income statement as opposed to in paid-in capital should be applied prospectively. The amendments related to the statement of cash flows presentation of excess tax benefits may be adopted either prospectively or retrospectively, while the amendments related to the presentation of employee taxes paid must be applied retrospectively. The remaining amendments - relating to the timing of when excess tax benefits are recognized, the change in the threshold for equity versus liability classification of certain awards, and the allowable policy election regarding forfeitures - should be applied using a modified retrospective transition method by means of a cumulative-effect adjustment to equity as of the beginning of the period in which the guidance is adopted. The Company is currently evaluating the impact of this guidance, but expects it will have an impact on the Company's financial position, results of operations and cash flows upon adoption.

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Acquisition and Disposals (Tables)

3 Months Ended

Mar. 31, 2016

Business Combinations [Abstract]

Transaction related costs

As a part of the ongoing integration of Catlin's operations, the Company incurs costs associated with restructuring the systems, processes and workforce. These costs include such items as severance, retention, facilities and consulting and other costs. The Company separately identifies such costs and includes these expenses within Corporate and Other:

(U.S. dollars in thousands)	Severance related costs		Retention and other compensation costs		Facilities-related costs		Consulting and other		Total
Liabilities at December 31, 2015	$	16,127	$	16,969	$	818	$	23,375	$	57,289
Costs incurred in 2016	16,758		8,006		6,103		24,120		54,987
2016 payments	16,535		17,466		1,040		16,303		51,344
Liabilities at March 31, 2016	$	16,350	$	7,509	$	5,881	$	31,192	$	60,932

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Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2016

Fair Value Disclosures [Abstract]

Fair Value Hierarchy

The following tables set forth the Company’s assets and liabilities that were accounted for at fair value as of March 31, 2016 and December 31, 2015 by level within the fair value hierarchy:

March 31, 2016 (U.S. dollars in thousands)	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Other Unobservable Inputs (Level 3)		Collateral and Counterparty Netting		Balance at March 31, 2016
Assets
Fixed maturities - Available for Sale ("AFS") - Excluding Life Funds Withheld Assets
U.S. Government and Government-Related/Supported ("U.S. Government")	$	—	$	4,532,047	$	44,940	$	—	$	4,576,987
Corporate - Financials	—		3,660,732		43,583		—		3,704,315
Corporate - Non Financials	—		7,091,329		181		—		7,091,510
Residential mortgage-backed securities – Agency ("RMBS - Agency")	—		4,364,154		2,853		—		4,367,007
Residential mortgage-backed securities – Non-Agency ("RMBS - Non-Agency")	—		302,843		—		—		302,843
Commercial mortgage-backed securities ("CMBS")	—		325,485		—		—		325,485
Collateralized debt obligations ("CDOs")	—		—		21,729		—		21,729
Other asset-backed securities (1)	—		1,158,698		4,200		—		1,162,898
U.S. States and political subdivisions of the States	—		2,584,747		—		—		2,584,747
Non-U.S. Sovereign Government, Provincial, Supranational and Government-Related/Supported ("Non-U.S. Governments")	—		5,546,695		—		—		5,546,695
Total fixed maturities - AFS - Excluding Funds Withheld Assets, at fair value	$	—	$	29,566,730	$	117,486	$	—	$	29,684,216
Equity securities, at fair value	532,672		345,735				—		878,407
Short-term investments, at fair value (1)	—		317,304		—		—		317,304
Total investments AFS - Excluding Funds Withheld Assets	$	532,672	$	30,229,769	$	117,486	$	—	$	30,879,927
Fixed maturities - Life Funds Withheld Assets
U.S. Government	$	—	$	12,692	$	—	$	—	$	12,692
Corporate - Financials	—		547,279		—		—		547,279
Corporate - Non Financials	—		1,269,262		—		—		1,269,262
RMBS – Agency	—		733		—		—		733
RMBS – Non-Agency	—		25,829		—		—		25,829
CMBS	—		108,914		—		—		108,914
Other asset-backed securities	—		121,721		—		—		121,721
Non-U.S. Governments	—		876,927		—		—		876,927
Total fixed maturities - AFS - Life Funds Withheld Assets, at fair value	$	—	$	2,963,357	$	—	$	—	$	2,963,357
Total investments - AFS, at fair value	$	532,672	$	33,193,126	$	117,486	$	—	$	33,843,284
Fixed maturities - Trading
U.S. Government	$	—	$	15,267	$	—	$	—	$	15,267
Corporate - Financials	—		382,755		—		—		382,755
Corporate - Non Financials	—		558,284		—		—		558,284
RMBS – Agency	—		1,869		—		—		1,869
CMBS	—		4,760		—		—		4,760
Other asset-backed securities	—		25,615		—		—		25,615
Non-U.S. Governments	—		421,033		—		—		421,033
Total fixed maturities - Trading, at fair value	$	—	$	1,409,583	$	—	$	—	$	1,409,583
Short-term investments, at fair value (1)	—		26,959		—		—		$	26,959
Total investments, Trading	$	—	$	1,436,542	$	—	$	—	$	1,436,542

March 31, 2016 (U.S. dollars in thousands)	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Other Unobservable Inputs (Level 3)		Collateral and Counterparty Netting			Balance at March 31, 2016
Cash equivalents (2)	295,962		881,157		—		—			1,177,119
Cash equivalents - Life Funds Withheld Assets (2)	—		92,444		—		—			92,444
Other investments (3)	—		1,011,336		301,095		—			1,312,431
Other assets (4)	—		56,118		20,486		(37,870		)	38,734
Total assets accounted for at fair value	$	828,634	$	36,670,723	$	439,067	$	(37,870	)	$	37,900,554
Liabilities
Funds withheld on GreyCastle life retrocession arrangements (net of future policy benefit reserves recoverable) (5)	$	—	$	681,811	$	—	$	—		$	681,811
Financial instruments sold, but not yet purchased (6)	2,180		—		—		—			2,180
Other liabilities (4)	—		58,350		30,338		(37,870		)	50,818
Total liabilities accounted for at fair value	$	2,180	$	740,161	$	30,338	$	(37,870	)	$	734,809

December 31, 2015 (U.S. dollars in thousands)	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Other Unobservable Inputs (Level 3)		Collateral and Counterparty Netting		Balance at December 31, 2015
Assets
Fixed maturities - AFS - Excluding Life Funds Withheld Assets
U.S. Government	$	—	$	5,020,574	$	45,063	$	—	$	5,065,637
Corporate - Financials	—		3,508,224		53,685		—		$	3,561,909
Corporate - Non Financials	—		6,900,259		188		—		$	6,900,447
RMBS - Agency	—		3,754,894		3,077		—		$	3,757,971
RMBS - Non-Agency	—		328,540		—		—		$	328,540
CMBS	—		405,316		—		—		$	405,316
CDOs	—		2		32,408		—		$	32,410
Other asset-backed securities	—		1,150,715		17,857		—		$	1,168,572
U.S. States and political subdivisions of the States	—		2,632,070		—		—		$	2,632,070
Non-U.S. Government	—		5,251,614		—		—		$	5,251,614
Total fixed maturities - AFS - Excluding Funds Withheld Assets, at fair value	$	—	$	28,952,208	$	152,278	$	—	$	29,104,486
Equity securities, at fair value	528,581		350,338		—		—		878,919
Short-term investments, at fair value (1)	—		617,390		—		—		617,390
Total investments AFS - Excluding Funds Withheld Assets	$	528,581	$	29,919,936	$	152,278	$	—	$	30,600,795
Fixed maturities - Life Funds Withheld Assets
U.S. Government	$	—	$	12,742	$	—	$	—	$	12,742
Corporate - Financials	—		598,236		—		—		$	598,236
Corporate - Non Financials	—		1,308,628		—		—		$	1,308,628
RMBS – Agency	—		752		—		—		$	752
RMBS – Non-Agency	—		26,953		—		—		$	26,953
CMBS	—		122,481		—		—		$	122,481
Other asset-backed securities	—		149,795		—		—		$	149,795
Non-U.S. Government	—		933,516		—		—		$	933,516
Total fixed maturities - AFS - Life Funds Withheld Assets, at fair value	$	—	$	3,153,103	$	—	$	—	$	3,153,103
Total investments - AFS, at fair value	$	528,581	$	33,073,039	$	152,278	$	—	$	33,753,898

December 31, 2015 (U.S. dollars in thousands)	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Other Unobservable Inputs (Level 3)		Collateral and Counterparty Netting			Balance at December 31, 2015
Fixed maturities - Trading
U.S. Government	$	—	$	4,990	$	—	$	—		$	4,990
Corporate - Financials	—		335,956		—		—			$	335,956
Corporate - Non Financials	—		493,621		—		—			$	493,621
RMBS – Agency	—		368		—		—			$	368
CMBS	—		4,803		—		—			$	4,803
Other asset-backed securities	—		25,700		—		—			$	25,700
Non-U.S. Government	—		370,261		—		—			$	370,261
Total fixed maturities - Trading, at fair value	$	—	$	1,235,699	$	—	$	—		$	1,235,699
Short-term investments, at fair value (1)	—		60,330		—		—			$	60,330
Total investments, Trading	$	—	$	1,296,029	$	—	$	—		$	1,296,029
Cash equivalents (2)	437,742		830,924		—		—			$	1,268,666
Cash equivalents - Life Funds Withheld Assets (2)	517		100,757		—		—			$	101,274
Other investments (3)	—		1,008,176		283,550		—			$	1,291,726
Other assets (4)	—		69,914		19,400		(3,087		)	$	86,227
Total assets accounted for at fair value	$	966,840	$	36,378,839	$	455,228	$	(3,087	)	$	37,797,820
Liabilities
Funds withheld on GreyCastle life retrocession arrangements (net of future policy benefit reserves recoverable) (5)	$	—	$	463,915	$	—	$	—		$	463,915
Financial instruments sold, but not yet purchased (6)	347		—		—		—			$	347
Other liabilities (4)	—		16,304		29,191		(3,087		)	$	42,408
Total liabilities accounted for at fair value	$	347	$	480,219	$	29,191	$	(3,087	)	$	506,670

____________

(1) Short-term investments consist primarily of Corporate securities and U.S. and Non-U.S. Government and Government-Related/Supported securities.

(2) Cash equivalents balances subject to fair value measurement include certificates of deposit and money market funds. Operating cash balances are not subject to recurring fair value measurement guidance.

(3) The Other investments balance excludes certain structured transactions including certain investments in project finance transactions, and a payment obligation and liquidity financing provided to a structured credit vehicle as a part of a third party medium term note facility. These investments, which totaled $141.5 million as of March 31, 2016 and $141.3 million as of December 31, 2015, are carried at amortized cost. For further information, see Item 8, Note 8, "Other Investments," to the Consolidated Financial Statements included in our Annual Report on Form 10-K for the year ended December 31, 2015.

(4) Other assets and other liabilities include derivative instruments. The derivative balances included in each category are reported on a gross basis by level with a netting adjustment presented separately in the Collateral and Counterparty Netting column. The fair values of the individual derivative contracts are reported gross in their respective levels based on the fair value hierarchy. For further details regarding derivative fair values and associated collateral received or paid, see Note 7, "Derivative Instruments."

(5) Funds withheld on GreyCastle life retrocession arrangements (net of future policy benefit reserves recoverable) include balances related to the life retrocession embedded derivative, under which all investment results associated with the Life Funds Withheld Assets related to the GreyCastle Life Retro Arrangements described in Note 1, "Basis of Preparation and Consolidation," accrue to the benefit of GCLR.

(6) Financial instruments sold, but not yet purchased, represent "short sales" and are included within "Payable for investments purchased" on the balance sheets.

Level 3 Roll Forward

	Level 3 Assets and Liabilities - Three Months Ended March 31, 2016
(U.S. dollars in thousands)	U.S. Government			Corporate - Financials			Corporate - Non-Financials			RMBS - Agency
Balance, beginning of period	$	45,063		$	53,685		$	188		$	3,077
Realized gains (losses)	(37		)	53			—			(3		)
Movement in unrealized gains (losses)	593			(39		)	(1		)	7
Purchases and issuances	—			169			—			—
Sales	—			—			—			—
Settlements	(679		)	—			(6		)	(228		)
Transfers into Level 3	—			—			—			—
Transfers out of Level 3	—			(10,285		)	—			—
Fixed maturities to short-term investments classification change				—			—			—
Balance, end of period	$	44,940		$	43,583		$	181		$	2,853
Movement in total gains (losses) above relating to instruments still held at the reporting date	$	554		$	15		$	(1	)	$	4
(U.S. dollars in thousands)	RMBS - Non Agency			CMBS			CDO			Other asset- backed securities
Balance, beginning of period	$	—		$	—		$	32,408		$	17,857
Realized gains (losses)	—			—			41			1,049
Movement in unrealized gains (losses)	—			—			5,257			(2,758		)
Purchases and issuances	—			—			—			—
Sales	—			—			—			—
Settlements	—			—			(15,977		)	(11,948		)
Transfers into Level 3	—			—			—			—
Transfers out of Level 3	—			—			—			—
Fixed maturities to short-term investments classification change	—			—			—			—
Balance, end of period	$	—		$	—		$	21,729		$	4,200
Movement in total gains (losses) above relating to instruments still held at the reporting date	$	—		$	—		$	5,297		$	(1,708	)
(U.S. dollars in thousands)	Non-US Government			Short-term investments			Other investments			Derivative Contracts - Net
Balance, beginning of period	$	—		$	—		$	283,550		$	(9,791	)
Realized gains (losses)	—			—			5,807			—
Movement in unrealized gains (losses)	—			—			(2,717		)	(61		)
Purchases and issuances	—			—			13,779			—
Sales	—			—			—			—
Settlements	—			—			(14,818		)	—
Transfers into Level 3	—			—			15,494			—
Transfers out of Level 3	—			—			—			—
Fixed maturities to short-term investments classification change	—			—			—			—
Balance, end of period	$	—		$	—		$	301,095		$	(9,852	)
Movement in total gains (losses) above relating to instruments still held at the reporting date	$	—		$	—		$	3,090		$	(61	)

	Level 3 Assets and Liabilities - Three Months Ended March 31, 2015
(U.S. dollars in thousands)	U.S. Government		Corporate - Financials		Corporate - Non-Financials			RMBS - Agency
Balance, beginning of period	$	—	$	—	$	5,894		$	1,910
Realized gains (losses)	—		—		(1		)	—
Movement in unrealized gains (losses)	—		—		48			(1		)
Purchases and issuances (1)	—		—		—			—
Sales	—		—		—			—
Settlements	—		—		(80		)	(89		)
Transfers into Level 3	—		—		—			—
Transfers out of Level 3	—		—		—			—
Fixed maturities to short-term investments classification change	—		—		—			—
Balance, end of period	$	—	$	—	$	5,861		$	1,820
Movement in total gains (losses) above relating to instruments still held at the reporting date	$	—	$	—	$	48		$	(1	)
(U.S. dollars in thousands)	RMBS - Non Agency		CMBS		CDO			Other asset- backed securities
Balance, beginning of period	$	—	$	—	$	687,958		$	5,288
Realized gains (losses)	—		—		36			(1		)
Movement in unrealized gains (losses)	—		—		5,555			2
Purchases and issuances (1)	—		—		—			—
Sales	—		—		(155,085		)	—
Settlements	—		—		(41,541		)	(3,045		)
Transfers into Level 3	—		—		—			—
Transfers out of Level 3	—		—		—			—
Fixed maturities to short-term investments classification change	—		—		—			—
Balance, end of period	$	—	$	—	$	496,923		$	2,244
Movement in total gains (losses) above relating to instruments still held at the reporting date	$	—	$	—	$	2,668		$	—
(U.S. dollars in thousands)	Non-US Government		Short-term investments		Other investments			Derivative Contracts - Net
Balance, beginning of period	$	—	$	—	$	185,083		$	(9,764	)
Realized gains (losses)	—		—		1,302			—
Movement in unrealized gains (losses)	—		—		(1,827		)	158
Purchases and issuances (1)	—		—		6,793			—
Sales	—		—		—			—
Settlements	—		—		(1,254		)	—
Transfers into Level 3	—		—		—			—
Transfers out of Level 3	—		—		—			—
Fixed maturities to short-term investments classification change	—		—		—			—
Balance, end of period	$	—	$	—	$	190,097		$	(9,606	)
Movement in total gains (losses) above relating to instruments still held at the reporting date	$	—	$	—	$	(524	)	$	158

Financial Instruments Not Carried at Fair Value

The following table includes financial instruments for which the carrying value differs from the estimated fair values as of March 31, 2016 and December 31, 2015. All of these fair value estimates are considered Level 2 fair value measurements.

	March 31, 2016				December 31, 2015
(U.S. dollars in thousands)	Carrying Value		Fair Value		Carrying Value		Fair Value
Financial Assets - Other investments	$	141,459	$	153,844	$	141,329	$	154,065
Deposit liabilities	$	1,171,655	$	1,478,856	$	1,168,376	$	1,436,210
Notes payable and debt	2,645,647		2,815,562		2,644,970		2,805,152
Financial Liabilities	$	3,817,302	$	4,294,418	$	3,813,346	$	4,241,362

XML

Segment Information (Tables)

3 Months Ended

Mar. 31, 2016

Segment Reporting [Abstract]

Schedule of segment reporting, by segment

The following tables summarize the segment results for the three months ended March 31, 2016 and 2015:

Three Months Ended March 31, 2016 (U.S. dollars in thousands, except ratios)	Insurance			Reinsurance			Total P&C			Corporate and Other (1)			Total
Gross premiums written	$	2,503,972		$	1,855,343		$	4,359,315		$	68,911		$	4,428,226
Net premiums written	1,503,934			1,557,661			3,061,595			3,164			3,064,759
Net premiums earned	1,593,874			757,572			2,351,446			3,164			2,354,610
Less: Net losses and loss expenses (2)	999,592			382,893			1,382,485			4,937			1,387,422
Less: Acquisition costs (2)	225,458			176,348			401,806			1,461			403,267
Less: Operating expenses (3)	312,432			79,234			391,666			218			391,884
Underwriting profit (loss)	$	56,392		$	119,097		$	175,489		$	(3,452	)	$	172,037
Net investment income - excluding Life Funds Withheld Assets (4)							143,131			8,533			151,664
Net investment income - Life Funds Withheld Assets										41,560			41,560
Net results from structured products (5)	1,222			748			1,970			—			1,970
Net fee income and other (6)	(3,862		)	837			(3,025		)	302			(2,723		)
Net realized gains (losses) on investments - excluding Life Funds Withheld Assets							(11,160		)	2,744			(8,416		)
Net realized gains (losses) on investments and net unrealized gains (losses) on investments, Trading - Life Funds Withheld Assets							—			101,166			101,166
Net realized and unrealized gains (losses) on derivative instruments							—			(3,622		)	(3,622		)
Net realized and unrealized gains (losses) on life retrocession embedded derivative and derivative instruments - Life Funds Withheld Assets							—			(236,080		)	(236,080		)
Net income (loss) from investment fund affiliates and operating affiliates							—			8,071			8,071
Gain on sale of operating affiliate										—			—
Less: Exchange (gains) losses							—			(33,819		)	(33,819		)
Less: Corporate operating expenses							—			112,510			112,510
Contribution from P&C and Corporate and Other							306,405			(159,469		)	146,936
Less: Interest expense (7)										41,613			41,613
Less: Non-controlling interests										61,143			61,143
Less: Income tax expense										22,295			22,295
Net income (loss) attributable to ordinary shareholders													$	21,885
Ratios – P&C operations: (8)
Loss and loss expense ratio	62.7		%	50.5		%	58.8		%
Underwriting expense ratio	33.8		%	33.8		%	33.7		%
Combined ratio	96.5		%	84.3		%	92.5		%

____________

(1) Corporate and Other includes other items of our revenue and expenditures that are not evaluated at the segment level for reporting purposes, as well as the Company's Run-Off Life Operations.

(2) The Company has reflected the amortization of certain fair value adjustments recorded in conjunction with the Catlin Acquisition within the respective segments.

(3) Operating expenses of the segments exclude Corporate operating expenses, shown separately.

(4) Net investment income - excluding Life Funds Withheld Assets does not include net investment income related to the net results from structured products.

(5) The net results from P&C structured products include net investment income and interest expense of $12.7 million and $10.7 million, respectively.

(6) Net fee income and other includes operating expenses from the Company's loss prevention consulting services business.

(7) Interest expense excludes interest expense related to structured products recorded in the Insurance and Reinsurance segments.

(8) Ratios are based on net premiums earned from P&C operations.

Three Months Ended March 31, 2015 (U.S. dollars in thousands, except ratios)	Insurance			Reinsurance			Total P&C			Corporate and Other (1)			Total
Gross premiums written	$	1,654,747		$	825,662		$	2,480,409		$	74,951		$	2,555,360
Net premiums written	1,089,108			747,635			1,836,743			14,506			1,851,249
Net premiums earned	962,306			357,188			1,319,494			14,506			1,334,000
Less: Net losses and loss expenses	616,947			152,880			769,827			19,387			789,214
Less: Acquisition costs	80,387			71,492			151,879			1,817			153,696
Less: Operating expenses (2)	208,457			42,495			250,952			931			251,883
Underwriting profit (loss)	$	56,515		$	90,321		$	146,836		$	(7,629	)	$	139,207
Net investment income - excluding Life Funds Withheld Assets (3)							132,808			10,210			143,018
Net investment income - Life Funds Withheld Assets										50,419			50,419
Net results from structured products (4)	2,905			2,120			5,025			—			5,025
Net fee income and other (5)	(7,465		)	825			(6,640		)	132			(6,508		)
Loss on sale of life reinsurance subsidiary							—			—			—
Net realized gains (losses) on investments - excluding Life Funds Withheld Assets							5,807			(1,205		)	4,602
Net realized gains (losses) on investments and net unrealized gains (losses) on investments, Trading - Life Funds Withheld Assets							—			48,289			48,289
Net realized and unrealized gains (losses) on derivative instruments							—			16,521			16,521
Net realized and unrealized gains (losses) on life retrocession embedded derivative and derivative instruments - Life Funds Withheld Assets							—			(229,367		)	(229,367		)
Net income (loss) from investment fund affiliates and operating affiliates							—			57,997			57,997
Less: Exchange (gains) losses							—			27,390			27,390
Less: Corporate operating expenses							—			62,443			62,443
Contribution from P&C and Corporate and Other							283,836			(144,466		)	139,370
Less: Interest expense (6)										41,481			41,481
Less: Non-controlling interests										37,390			37,390
Less: Income tax expense										24,218			24,218
Net income (loss) attributable to ordinary shareholders													$	36,281
Ratios – P&C operations: (7)
Loss and loss expense ratio	64.1		%	42.8		%	58.3		%
Underwriting expense ratio	30.0		%	31.9		%	30.6		%
Combined ratio	94.1		%	74.7		%	88.9		%

____________

(1) Corporate and Other includes other items of our revenue and expenditures that are not evaluated at the segment level for reporting purposes, as well as the Company's Run-Off Life Operations.

(2) Operating expenses of the segments exclude Corporate operating expenses, shown separately.

(3) Net investment income - excluding Life Funds Withheld Assets does not include net investment income related to the net results from structured products.

(4) The net results from P&C structured products include net investment income and interest expense of $15.1 million and $10.0 million, respectively.

(5) Net fee income and other includes operating expenses from the Company's loss prevention consulting services business.

(6) Interest expense excludes interest expense related to structured products recorded in the Insurance and Reinsurance segments.

(7) Ratios are based on net premiums earned from P&C operations.

Schedule of net premiums earned by line of business

The following tables summarize the Company’s net premiums earned by line of business for the three months ended March 31, 2016 and 2015:

Three Months Ended March 31, 2016 (U.S. dollars in thousands)	Insurance		Reinsurance		Corporate and Other			Total
P&C Operations:
Professional	$	332,954	$	43,155	$	—		$	376,109
Casualty	420,212		154,739		—			574,951
Property catastrophe	—		205,301		—			205,301
Property	359,633		254,399		—			614,032
Specialty	367,352		36,193		—			403,545
Other (1)	113,723		63,785		—			177,508
Total P&C Operations	$	1,593,874	$	757,572	$	—		$	2,351,446
Corporate and Other:
Run-off Life operations - Annuity	$	—	$	—	$	—		$	—
Run-off Life operations - Other Life	—		—		3,164			3,164
Total Corporate and Other	$	—	$	—	$	3,164		$	3,164
Total	$	1,593,874	$	757,572	$	3,164		$	2,354,610
Three Months Ended March 31, 2015 (U.S. dollars in thousands)	Insurance		Reinsurance		Corporate and Other			Total
P&C Operations:
Professional	$	266,410	$	35,008	$	—		$	301,418
Casualty	341,317		58,208		—			399,525
Property catastrophe	—		94,073		—			94,073
Property	172,539		131,224		—			303,763
Specialty	171,878		18,075		—			189,953
Other (1)	10,162		20,600		—			30,762
Total P&C Operations	$	962,306	$	357,188	$	—		$	1,319,494
Corporate and Other:
Run-off Life operations - Annuity	$	—	$	—	$	(1	)	$	(1	)
Run-off Life operations - Other Life	—		—		14,507			14,507
Total Corporate and Other	$	—	$	—	$	14,506		$	14,506
Total	$	962,306	$	357,188	$	14,506		$	1,334,000

____________

(1) Other within the Insurance segment includes: excess and surplus, programs, surety, structured indemnity and certain discontinued lines. Other within the Reinsurance segment includes: whole account contracts, structured indemnity and other lines.

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Investments (Tables)

3 Months Ended

Mar. 31, 2016

Investments, Debt and Equity Securities [Abstract]

Amortized cost and fair value summary

The cost (amortized cost for fixed maturities and short-term investments), fair value, gross unrealized gains and gross unrealized (losses), including non-credit related OTTI recorded in AOCI, of the Company’s AFS investments as of March 31, 2016 and December 31, 2015, were as follows:

			Included in AOCI
March 31, 2016 (U.S. dollars in thousands)	Cost or Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value		Non-credit Related OTTI (1)
Fixed maturities - AFS
U.S. Government	$	4,483,796	$	101,066	$	(7,875	)	$	4,576,987	$	—
Corporate - Financials	3,656,521		75,341		(27,547		)	3,704,315		—
Corporate - Non Financials	6,935,636		210,829		(54,955		)	7,091,510		—
RMBS – Agency	4,259,838		112,260		(5,091		)	4,367,007		—
RMBS – Non-Agency	303,377		20,313		(20,847		)	302,843		(52,025		)
CMBS	317,886		10,324		(2,725		)	325,485		(1,163		)
CDO	25,845		2		(4,118		)	21,729		(1,208		)
Other asset-backed securities	1,154,679		19,123		(10,904		)	1,162,898		(1,027		)
U.S. States and political subdivisions of the States	2,436,400		149,140		(793		)	2,584,747		—
Non-U.S. Governments	5,442,418		161,392		(57,115		)	5,546,695		—
Total fixed maturities - AFS - Excluding Life Funds Withheld Assets	$	29,016,396	$	859,790	$	(191,970	)	$	29,684,216	$	(55,423	)
Total short-term investments - Excluding Life Funds Withheld Assets	317,939		433		(1,068		)	317,304		—
Total equity securities	831,543		93,517		(46,653		)	878,407		—
Total investments - AFS - Excluding Life Funds Withheld Assets	$	30,165,878	$	953,740	$	(239,691	)	$	30,879,927	$	(55,423	)
Fixed maturities - AFS - Life Funds Withheld Assets
U.S. Government	$	10,315	$	2,377	$	—		$	12,692	$	—
Corporate - Financials	486,901		60,378		—			547,279		—
Corporate - Non Financials	1,058,886		210,376		—			1,269,262		—
RMBS – Agency	597		136		—			733		—
RMBS – Non-Agency	23,172		2,657		—			25,829		—
CMBS	92,586		16,328		—			108,914		—
Other asset-backed securities	105,635		16,086		—			121,721		—
Non-U.S. Governments	650,259		226,668		—			876,927		—
Total fixed maturities - AFS - Life Funds Withheld Assets	$	2,428,351	$	535,006	$	—		$	2,963,357	$	—
Total investments - AFS	$	32,594,229	$	1,488,746	$	(239,691	)	$	33,843,284	$	(55,423	)

____________

(1) Represents the non-credit component of OTTI losses, adjusted for subsequent sales of securities. It does not include the change in fair value subsequent to the impairment measurement date.

December 31, 2015 (U.S. dollars in thousands)	Cost or Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value		Non-credit Related OTTI (1)
Fixed maturities - AFS - Excluding Life Funds Withheld Assets
U.S. Government	$	5,047,621	$	52,355	$	(34,339	)	$	5,065,637	$	—
Corporate - Financials	3,535,830		49,535		(23,456		)	3,561,909		—
Corporate - Non Financials	6,867,525		130,568		(97,646		)	6,900,447		—
RMBS – Agency	3,697,756		77,776		(17,561		)	3,757,971		—
RMBS – Non-Agency	319,876		25,644		(16,980		)	328,540		(54,200		)
CMBS	401,713		7,933		(4,330		)	405,316		(1,182		)
CDOs	41,679		4		(9,273		)	32,410		(1,208		)
Other asset-backed securities	1,164,426		17,665		(13,519		)	1,168,572		(1,144		)
U.S. States and political subdivisions of the States	2,514,048		125,395		(7,373		)	2,632,070		—
Non-U.S. Government	5,249,148		100,383		(97,917		)	5,251,614		—
Total fixed maturities - AFS - Excluding Life Funds Withheld Assets	$	28,839,622	$	587,258	$	(322,394	)	$	29,104,486	$	(57,734	)
Total short-term investments - Excluding Life Funds Withheld Assets	$	618,851	$	967	$	(2,428	)	$	617,390	$	—
Total equity securities - Excluding Life Funds Withheld Assets	$	834,079	$	89,993	$	(45,153	)	$	878,919	$	—
Total investments - AFS - Excluding Life Funds Withheld Assets	$	30,292,552	$	678,218	$	(369,975	)	$	30,600,795	$	(57,734	)
Fixed maturities - AFS - Life Funds Withheld Assets
U.S. Government	$	10,721	$	2,021	$	—		$	12,742	$	—
Corporate - Financials	531,016		67,220		—			598,236		—
Corporate - Non Financials	1,132,926		175,702		—			1,308,628		—
RMBS – Agency	591		161		—			752		—
RMBS – Non-Agency	24,401		2,552		—			26,953		—
CMBS	107,968		14,513		—			122,481		—
Other asset-backed securities	132,674		17,121		—			149,795		—
Non-U.S. Governments	737,735		195,781		—			933,516		—
Total fixed maturities - AFS - Life Funds Withheld Assets	$	2,678,032	$	475,071	$	—		$	3,153,103	$	—
Total investments - AFS	$	32,970,584	$	1,153,289	$	(369,975	)	$	33,753,898	$	(57,734	)

____________

(1) Represents the non-credit component of OTTI losses, adjusted for subsequent sales of securities. It does not include the change in fair value subsequent to the impairment measurement date.

The cost (amortized cost for fixed maturities and short-term investments) and fair value of the Company’s Trading investments at December 31, 2016 and 2015, were as follows:

March 31, 2016 (U.S. dollars in thousands)	Amortized Cost		Fair Value
Fixed maturities - Trading - Life Funds Withheld Assets
U.S. Government	$	15,567	$	15,267
Corporate - Financials	379,848		382,755
Corporate - Non Financials	549,458		558,284
RMBS – Agency	1,917		1,869
CMBS	4,675		4,760
Other asset-backed securities	25,457		25,615
Non-U.S. Governments	390,986		421,033
Total fixed maturities - Trading - Life Funds Withheld Assets	$	1,367,908	$	1,409,583
Total short-term investments - Trading - Life Funds Withheld Assets	$	26,949	$	26,959
Total investments - Trading - Life Funds Withheld Assets	$	1,394,857	$	1,436,542

December 31, 2015 (U.S. dollars in thousands)	Amortized Cost		Fair Value
Fixed maturities - Trading - Life Funds Withheld Assets
U.S. Government	$	4,957	$	4,990
Corporate - Financials	344,070		335,956
Corporate - Non Financials	509,441		493,621
RMBS – Agency	370		368
CMBS	4,874		4,803
Other asset-backed securities	26,405		25,700
Non-U.S. Governments	373,492		370,261
Total fixed maturities - Trading - Life Funds Withheld Assets	$	1,263,609	$	1,235,699
Total short-term investments - Trading - Life Funds Withheld Assets	$	60,176	$	60,330
Total investments - Trading - Life Funds Withheld Assets	$	1,323,785	$	1,296,029

Contractual maturities summary

The contractual maturities of AFS fixed income securities at March 31, 2016 and December 31, 2015 are shown below. Actual maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties.

	March 31, 2016				December 31, 2015
(U.S. dollars in thousands)	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Fixed maturities - AFS - Excluding Life Funds Withheld Assets
Due less than one year	$	2,156,182	$	2,151,862	$	2,106,851	$	2,104,106
Due after 1 through 5 years	13,787,996		14,020,514		14,051,494		14,143,461
Due after 5 through 10 years	5,622,857		5,828,464		5,680,830		5,740,954
Due after 10 years	1,387,736		1,503,414		1,374,997		1,423,156
	$	22,954,771	$	23,504,254	$	23,214,172	$	23,411,677
RMBS – Agency	4,259,838		4,367,007		3,697,756		3,757,971
RMBS – Non-Agency	303,377		302,843		319,876		328,540
CMBS	317,886		325,485		401,713		405,316
CDOs	25,845		21,729		41,679		32,410
Other asset-backed securities	1,154,679		1,162,898		1,164,426		1,168,572
Total mortgage and asset-backed securities	$	6,061,625	$	6,179,962	$	5,625,450	$	5,692,809
Total fixed maturities - AFS - Excluding Life Funds Withheld Assets	$	29,016,396	$	29,684,216	$	28,839,622	$	29,104,486
Fixed maturities - AFS - Life Funds Withheld Assets
Due less than one year	$	78,629	$	88,560	$	81,700	$	92,921
Due after 1 through 5 years	361,106		391,528		386,810		416,743
Due after 5 through 10 years	470,386		547,171		491,621		558,805
Due after 10 years	1,296,240		1,678,901		1,452,267		1,784,653
	$	2,206,361	$	2,706,160	$	2,412,398	$	2,853,122
RMBS – Agency	597		733		591		752
RMBS – Non-Agency	23,172		25,829		24,401		26,953
CMBS	92,586		108,914		107,968		122,481
Other asset-backed securities	105,635		121,721		132,674		149,795
Total mortgage and asset-backed securities	$	221,990	$	257,197	$	265,634	$	299,981
Total fixed maturities - AFS - Life Funds Withheld Assets	$	2,428,351	$	2,963,357	$	2,678,032	$	3,153,103
Total fixed maturities - AFS	$	31,444,747	$	32,647,573	$	31,517,654	$	32,257,589

	March 31, 2016				December 31, 2015
(U.S. dollars in thousands)	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Fixed maturities - Trading - Life Funds Withheld Assets
Due less than one year	$	8,177	$	8,831	$	4,573	$	5,096
Due after 1 through 5 years	290,320		291,356		278,163		272,220
Due after 5 through 10 years	314,590		320,720		280,487		277,920
Due after 10 years	722,772		756,432		668,737		649,592
	$	1,335,859	$	1,377,339	$	1,231,960	$	1,204,828
RMBS – Agency	1,917		1,869		370		368
CMBS	4,675		4,760		4,874		4,803
Other asset-backed securities	25,457		25,615		26,405		25,700
Total mortgage and asset-backed securities	$	32,049	$	32,244	$	31,649	$	30,871
Total fixed maturities - Trading - Life Funds Withheld Assets	$	1,367,908	$	1,409,583	$	1,263,609	$	1,235,699

Summary of unrealized losses

The following is an analysis of how long the AFS securities as of March 31, 2016 and December 31, 2015 had been in a continual unrealized loss position:

	Less than 12 months					Equal to or greater than 12 months
March 31, 2016 (U.S. dollars in thousands)	Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses
Fixed maturities and short-term investments - AFS
U.S. Government	$	465,423	$	(4,923	)	$	96,406	$	(2,984	)
Corporate – Financials	588,595		(18,228		)	141,508		(9,330		)
Corporate – Non Financials	930,465		(29,994		)	287,849		(25,073		)
RMBS – Agency	151,135		(1,128		)	327,657		(3,963		)
RMBS – Non-Agency	35,930		(1,867		)	175,881		(18,980		)
CMBS	31,661		(255		)	55,310		(2,470		)
CDOs	12,368		(509		)	9,359		(3,609		)
Other asset-backed securities	282,395		(2,113		)	60,638		(8,791		)
U.S. States and political subdivisions of the States	91,846		(379		)	15,528		(414		)
Non-U.S. Governments	965,976		(22,116		)	370,747		(35,912		)
Total fixed maturities and short-term investments - AFS	$	3,555,794	$	(81,512	)	$	1,540,883	$	(111,526	)
Total equity securities	$	365,368	$	(46,653	)	$	—	$	—

	Less than 12 months					Equal to or greater than 12 months
December 31, 2015 (U.S. dollars in thousands)	Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses
Fixed maturities and short-term investments - AFS
U.S. Government	$	3,762,869	$	(29,339	)	$	89,113	$	(5,044	)
Corporate – Financials	1,641,021		(13,280		)	102,022		(10,192		)
Corporate – Non Financials	3,275,270		(73,069		)	227,527		(24,706		)
RMBS – Agency	1,065,055		(10,046		)	221,211		(7,515		)
RMBS – Non-Agency	19,614		(1,104		)	180,146		(15,876		)
CMBS	118,605		(1,561		)	78,651		(2,769		)
CDOs	12,311		(516		)	20,096		(8,757		)
Other asset-backed securities	572,671		(5,252		)	57,563		(8,268		)
U.S. States and political subdivisions of the States	565,055		(6,609		)	12,259		(765		)
Non-U.S. Governments	1,921,286		(53,440		)	474,929		(46,714		)
Total fixed maturities and short-term investments - AFS	$	12,953,757	$	(194,216	)	$	1,463,517	$	(130,606	)
Total equity securities	$	356,742	$	(45,153	)	$	—	$	—

Analysis of net realized gains (losses) on investments

The following represents an analysis of net realized gains (losses) on investments:

Net Realized Gains (Losses) on Investments	Three months ended March 31,
(U.S. dollars in thousands)	2016			2015
Net realized gains (losses) on investments - excluding Life Funds Withheld Assets:
Gross realized gains	$	61,227		$	62,300
Gross realized losses on investments sold	(50,063		)	(47,122		)
OTTI on investments, net of amounts transferred to other comprehensive income	(19,580		)	(10,576		)
	$	(8,416	)	$	4,602
Net realized gains (losses) on investments and net unrealized gains (losses) on investments, Trading - Life Funds Withheld Assets:
Gross realized gains	$	62,850		$	53,128
Gross realized losses on investments sold	(28,434		)	(390		)
OTTI on investments, net of amounts transferred to other comprehensive income	(2,346		)	(5,209		)
Net unrealized gains (losses) on trading securities	$	69,096		$	760
	$	101,166		$	48,289
Total net realized gains (losses) on investments	$	92,750		$	52,891

Credit loss impairments on fixed inmcome securities rollforward

The following table sets forth the amount of credit loss impairments on fixed income securities for which a portion of the OTTI loss was recognized in OCI and that were held by the Company as of the dates or for the periods indicated and the corresponding changes in such amounts.

Credit Loss Impairments	Three months ended March 31,
(U.S. dollars in thousands)	2016			2015
Opening balance as of beginning of indicated period	$	73,469		$	131,942
Credit loss impairment recognized in the current period on securities not previously impaired	10,567			7,560
Credit loss impairments previously recognized on securities that matured, paid down, prepaid or were sold during the period	(4,877		)	(28,539		)
Additional credit loss impairments recognized in the current period on securities previously impaired	230			141
Accretion of credit loss impairments previously recognized due to an increase in cash flows expected to be collected	(2,410		)	(2,646		)
Balance as of March 31,	$	76,979		$	108,458

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Derivative Instruments (Tables)

3 Months Ended

Mar. 31, 2016

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Summary of location and gross amounts of derivative fair values

The following table summarizes information on the location and gross amounts of derivative fair values contained in the consolidated balance sheets as of March 31, 2016 and December 31, 2015:

	March 31, 2016								December 31, 2015
(U.S. dollars in thousands)	Asset Derivative Notional Amount		Asset Derivative Fair Value (1)		Liability Derivative Notional Amount		Liability Derivative Fair Value (1)		Asset Derivative Notional Amount		Asset Derivative Fair Value (1)		Liability Derivative Notional Amount		Liability Derivative Fair Value (1)
Derivatives designated as hedging instruments:
Foreign exchange contracts	$	1,216,823	$	50,707	$	1,001,752	$	54,387	$	1,667,585	$	64,289	$	674,976	$	11,941
Total derivatives designated as hedging instruments	$	1,216,823	$	50,707	$	1,001,752	$	54,387	$	1,667,585	$	64,289	$	674,976	$	11,941
Derivatives not designated as hedging instruments:
Investment Related Derivatives:
Foreign exchange exposure	199,007		2,501		46,628		534		102,234		2,888		144,707		1,702
Credit exposure	5,000		414		70,682		11,869		8,433		652		71,614		12,067
Financial market exposure	5		4		28,480		1,384		37		77		26,500		417

	March 31, 2016										December 31, 2015
(U.S. dollars in thousands)	Asset Derivative Notional Amount		Asset Derivative Fair Value (1)			Liability Derivative Notional Amount		Liability Derivative Fair Value (1)			Asset Derivative Notional Amount		Asset Derivative Fair Value (1)			Liability Derivative Notional Amount		Liability Derivative Fair Value (1)
Other Non-Investment Derivatives:
Foreign exchange contracts	188,400		2,492			—		—			194,566		2,009			—		—
Credit exposure	—		—			30,090		28			29,874		31			—		—
Guaranteed minimum income benefit contract	49,562		20,486			49,562		20,486			46,032		19,368			46,032		19,368
Modified coinsurance funds withheld contracts (2)	58,719		—			4,556,696		—			60,667		—			4,620,879		—
Total derivatives not designated as hedging instruments	$	500,693	$	25,897		$	4,782,138	$	34,301		$	441,843	$	25,025		$	4,909,732	$	33,554
Total derivatives			$	76,604				$	88,688				$	89,314				$	45,495
Counterparty netting			(37,870		)			(37,870		)			(3,087		)			(3,087		)
Total derivatives net of counterparty netting (1)			38,734					50,818					86,227					42,408
Cash collateral held/paid (3)			(5,520		)			(4,230		)			(30,958		)			—
Total derivatives as recorded in the balance sheets			$	33,214				$	46,588				$	55,269				$	42,408

____________

(1) Derivative instruments in an asset or liability position are included within Other assets or Other liabilities, respectively, in the balance sheets on a net basis where the Company has both a legal right of offset and the intention to settle the contracts on a net basis. The Company often enters into different types of derivative contracts with a single counterparty and these contracts are covered under netting agreements.

(2) The fair value movements in derivative assets and liabilities relating to modified coinsurance funds withheld contracts are included within the associated asset or liability at each period end on the face of the balance sheets. Notional amounts associated with reinsurance agreements under which the Company assumes reinsurance risk are recorded as asset derivative notional amounts. Notional amounts associated with the GreyCastle Life Retro Arrangements under which the Company cedes reinsurance risk are recorded as liability derivative notional amounts. Included in the liability derivative notional amount as of March 31, 2016 is the cumulative net realized and unrealized loss on life retrocession embedded derivative of $681.8 million.

(3) As of March 31, 2016, the Company held cash collateral related to foreign currency derivative positions and certain other derivative positions of $5.5 million for derivatives in an asset position and paid cash collateral of $4.2 million for derivatives in a liability position. As of December 31, 2015, the Company held cash collateral related to foreign currency derivative position and certain other derivative positions of $31.0 million for derivatives in an asset position and paid cash collateral of nil for derivatives in a liability position. The assets and liabilities related to the net collateral paid or held were recorded as Other assets and Other liabilities within the unaudited consolidated balance sheets as the collateral and derivative positions are not intended to be settled on a net basis.

Summary of fair value hedges that have been settled and their impact on results

A summary of the fair value hedges that have been settled and their impact on results during the indicated periods as well as the remaining balance of fair value hedges and average years remaining to maturity as of March 31, 2016 and 2015 are shown below:

Settlement of Fair Value Hedges - Summary	Fair Value Hedges - Deposit Liabilities March 31,
(U.S. dollars in thousands)	2016		2015
Cumulative reduction to interest expense	$	106,056	$	97,705
Remaining balance	127,139		135,490
Weighted average years remaining to maturity	21.2		22.2

Summary of hedges of net investment in foreign operation

The following table provides the weighted average U.S. dollar equivalent of foreign denominated net assets that were hedged and the resulting derivative gain (loss) that was recorded in the foreign currency translation adjustment, net of tax, account within AOCI for the three months ended March 31, 2016 and 2015:

Derivative Instruments Designated as Hedges of the Net Investment in a Foreign Operation - Summary	Three months ended March 31,
(U.S. dollars in thousands)	2016			2015
Weighted average of U.S. dollar equivalent of foreign denominated net assets	$	2,234,748		$	628,941
Derivative gains (losses) (1)	(11,515		)	66,770

____________

(1) Derivative gains (losses) from derivative instruments designated as hedges of the net investment in a foreign operation are recorded in the cumulative translation adjustment account within AOCI for each period.    

Summary of net realized and unrealized gains (losses) on derivative instruments

The following table provides the total impact on earnings relating to derivative instruments not formally designated as hedging instruments under authoritative accounting guidance and from the ineffective portion of fair value hedges. The impacts are all recorded through Net realized and unrealized gains (losses) on derivatives in the income statement for the three months ended March 31, 2016 and 2015:

Net Realized and Unrealized Gains (Losses) on Derivative Instruments	Three months ended March 31,
(U.S. dollars in thousands)	2016			2015
Investment Related Derivatives:
Interest rate exposure	$	781		$	9,637
Foreign exchange exposure	(670		)	(1,362		)
Credit exposure	(163		)	82
Financial market exposure	(1,010		)	3,041
Other Non-Investment Derivatives:
Foreign exchange contracts	(1,181		)	2,059
Credit exposure	(303		)	1,346
Modified coinsurance funds withheld contract	(1,076		)	1,718
Net realized and unrealized gains (losses) on derivative instruments	$	(3,622	)	$	16,521
Net realized and unrealized gains (losses) on life retrocession embedded derivative and derivative instruments - Life Funds Withheld Assets	$	(236,080	)	$	(229,367	)

Summary of impact of Life Retro Arrangements

The impact of the GreyCastle Life Retro Arrangements on the Company's results was as follows:

Impact of GreyCastle Life Retro Arrangements	Three months ended March 31,
(U.S. dollars in thousands)	2016			2015
Underwriting profit (loss) (1)	$	—		$	603
Net investment income - Life Funds Withheld Assets	41,560			50,419
Net realized gains (losses) on investments sold - Life Funds Withheld Assets	34,416			52,738
Net unrealized gains (losses) on investments, Trading - Life Funds Withheld Assets	69,096			760
OTTI on investments - Life Funds Withheld Assets	(2,346		)	(5,209		)
Exchange gains (losses)	11,119			3,684
Other income and expenses	(146		)	(1,298		)
Net realized and unrealized gains (losses) on life retrocession embedded derivative and derivative instruments - Life Funds Withheld Assets	(236,080		)	(229,367		)
Net income (loss)	$	(82,381	)	$	(127,670	)
Change in net unrealized gains (losses) on investments - Life Funds Withheld Assets, net of tax	51,990			37,115
Change in adjustments related to future policy benefit reserves, net of tax	17,035			60,356
Change in cumulative translation adjustment - Life Funds Withheld Assets, net of tax	13,356			30,802
Total changes to other comprehensive income as a result of GreyCastle Life Retro Arrangements	$	82,381		$	128,273
Comprehensive income (loss)	$	—		$	603

____________

(1) The underwriting profit of $0.6 million relates to a premium adjustment during the three months ended March 31, 2015 relating to the GreyCastle Life Retro Arrangements transaction. Excluding this transaction, the impact to comprehensive income relating to the GreyCastle Life Retro Arrangements was nil for the three months ended March 31, 2015.

Components of life retrocession embedded derivatives

The change in the value of the life retrocession embedded derivative includes the interest income, realized and unrealized gains and losses on Life Funds Withheld Assets and certain related expenses are as follows:

Components of Life Retrocession Embedded Derivative and Derivative Instruments - Life Funds Withheld Assets:	Three months ended March 31,
(U.S. dollars in thousands)	2016			2015
Interest income - Life Funds Withheld Assets	$	(43,110	)	$	(50,996	)
Realized and unrealized gains (losses) - Life Funds Withheld Assets	(174,932		)	(152,830		)
Other	146			96
Net realized and unrealized gains (losses) on life retrocession embedded derivative	$	(217,896	)	$	(203,730	)
Net adjustments related to future policy benefit reserves, net of tax	(22,053		)	(11,954		)
Net realized and unrealized gains (losses) on derivative instruments - Life Funds Withheld Assets	3,869			(13,683		)
Net realized and unrealized gains (losses) on life retrocession embedded derivative and derivative instruments - Life Funds Withheld Assets	$	(236,080	)	$	(229,367	)

Summary of contingent credit features

The aggregate fair value of all derivative agreements containing such rating downgrade provisions that were in a liability position and any collateral posted under these agreements as of March 31, 2016 and December 31, 2015 were as follows:

Contingent Credit Features - Summary: (U.S. dollars in thousands)	March 31, 2016		December 31, 2015
Aggregate fair value of derivative agreements with downgrade provisions in a net liability position	$	19,038	$	5,827
Collateral posted to counterparty	$	600	$	—

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Goodwill and Other Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2016

Goodwill and Intangible Assets Disclosure [Abstract]

Analysis of goodwill and intangible assets

The following table presents an analysis of intangible assets broken down between goodwill, intangible assets with an indefinite life and intangible assets with a definite life for the three months ended March 31, 2016:

(U.S. dollars in thousands)	Goodwill		Intangible assets with an indefinite life		Intangible assets with a definite life			Total
Balance at December 31, 2015	$	1,213,630	$	682,859	$	313,777		$	2,210,266
Additions	13,946		8,000		6,000			27,946
Amortization	—		—		(5,588		)	(5,588		)
Foreign Currency Translation	1,496		1,701		(2,224		)	973
Balance at March 31, 2016	$	1,229,072	$	692,560	$	311,965		$	2,233,597

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Share Capital (Tables)

3 Months Ended

Mar. 31, 2016

Stockholders' Equity Note [Abstract]

Schedule of Valuation Assumptions - Stock Options

The fair value of the options issued was estimated on the date of grant using the Black-Scholes option pricing model using the following weighted average assumptions:

Dividend yield	2.00	%
Risk free interest rate	1.37	%
Volatility	21.7	%
Expected lives	6.0 years

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Notes Payable and Debt and Financing Arrangements (Tables)

3 Months Ended

Mar. 31, 2016

Debt Disclosure [Abstract]

Schedule of financing structure

The following table presents the Company's outstanding notes payable and debt at March 31, 2016 and December 31, 2015:

(U.S. dollars in thousands)	March 31, 2016				December 31, 2015
	Commitment/ Debt (1)		In Use/ Outstanding (2)		Commitment/ Debt (1)		In Use/ Outstanding (2)
Debt:
2.30% Senior Notes due 2018	$	300,000	$	298,183	$	300,000	$	298,015
5.75% Senior Notes due 2021	400,000		397,630		400,000		397,523
6.375% Senior Notes due 2024	350,000		349,057		350,000		349,029
4.45% Subordinated Notes due 2025	500,000		492,723		500,000		492,521
6.25% Senior Notes due 2027	325,000		323,257		325,000		323,218
Trust Preferred Securities, face amount $8m, due 2035	8,248		8,248		—		—
5.25% Senior Notes due 2043	300,000		296,328		300,000		296,294
5.5% Subordinated Notes due 2045	500,000		488,469		500,000		488,370
Total debt carrying value	$	2,683,248	$	2,653,895	$	2,675,000	$	2,644,970

_______________

(1) Excluded from the table are certain credit facilities under which the Company is permitted to utilize up to $1.4 billion at March 31, 2016 and December 31, 2015, respectively, for revolving loans to support general operating and financing needs. However, at March 31, 2016 and December 31, 2015, $526.5 million and $527.1 million, respectively, were utilized under these facilities to issue letters of credit, leaving $823.5 million and $822.9 million, respectively, available to support other operating and financing needs.

(2)    "In Use/Outstanding" data represent March 31, 2016 and December 31, 2015 accreted values.

Letter of Credit Summary

The Company’s letter of credit facilities and revolving credit facilities as of March 31, 2016 and December 31, 2015 were as follows:

Letter of Credit Summary: (U.S. dollars in thousands except percentages)	March 31, 2016 (1)			December 31, 2015 (1)
Available letter of credit facilities - commitments	$	4,503,617		$	4,463,041
Available letter of credit facilities - in use (2)	$	2,548,085		$	2,515,653
Collateralized by certain assets of the Company’s investment portfolio	51.3		%	50.9		%

____________

(1) As of March 31, 2016 and December 31, 2015, there were fifteen available credit facilities

(2) As of March 31, 2016 and December 31, 2015 the stated portion of allowable credit facilities permitted to be utilized for revolving loans was $1.4 billion. However, as of March 31, 2016 and December 31, 2015, $526.5 million and $527.1 million, respectively, of such facilities' limits were utilized to issue letters of credit, leaving $823.5 million and $822.9 million, respectively, available either to issue additional letters of credit or to support other operating or financing needs under these particular facilities.

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Related Party Transactions (Tables)

3 Months Ended

Mar. 31, 2016

Related Party Transactions [Abstract]

Summary of related party transactions

During the three months ended March 31, 2016 and 2015, these contracts resulted in reported net premiums, reported net losses, and reported net acquisition costs as summarized below:

(U.S. dollars in thousands)	Three months ended March 31,
	2016		2015
Reported net premiums	$	24,016	$	27,076
Reported net losses	$	12,060	$	9,100
Reported net acquisition costs	$	11,604	$	9,012

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Computation of Earnings Per Ordinary Share and Ordinary Share Equivalent (Tables)

3 Months Ended

Mar. 31, 2016

Earnings Per Share [Abstract]

Calculation of earnings per share

The following table sets forth the computation of basic and diluted earnings per ordinary share for the three months ended March 31, 2016 and 2015:

	Three Months Ended March 31,
(In thousands, except per share amounts)	2016		2015
Basic earnings per ordinary share & ordinary share equivalents outstanding:
Net income (loss) attributable to ordinary shareholders	$	21,885	$	36,281
Weighted average ordinary shares outstanding, in thousands - basic	291,969		255,724
Basic earnings per ordinary share & ordinary share equivalents outstanding	$	0.07	$	0.14
Diluted earnings per ordinary share & ordinary share equivalents outstanding:
Weighted average ordinary shares outstanding - basic	291,969		255,724
Impact of share-based compensation	4,697		4,980
Weighted average ordinary shares outstanding - diluted	296,666		260,704
Diluted earnings per ordinary share & ordinary share equivalents outstanding	$	0.07	$	0.14
Dividends per ordinary share	$	0.20	$	0.16

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Accumulated Other Comprehensive Income (Loss) (Tables)

3 Months Ended

Mar. 31, 2016

Comprehensive Income Loss Note [Abstract]

Schedule of Accumulated Other Comprehensive Income (Loss)

The changes in AOCI, net of tax, by component for the three months ended March 31, 2016 and 2015 are as follows:

Three months ended March 31, 2016 (U.S. dollars in thousands)	Unrealized Gains (Losses) on Investments (1)			OTTI Losses Recognized in AOCI			Foreign Currency Translation Adjustments			Underfunded Pension Liability			Cash Flow Hedge			Total
Balance, beginning of period, net of tax	$	803,094		$	(57,502	)	$	(36,503	)	$	(24,641	)	$	2,168		$	686,616
OCI before reclassifications	575,022			—			(15,416		)	(1,049		)	—			558,557
Amounts reclassified from AOCI	(117,114		)	2,311			—			—			(39		)	(114,842		)
Tax benefit (expense)	(34,707		)	(44		)	(1,023		)	—			—			(35,774		)
Net current period OCI - net of tax	423,201			2,267			(16,439		)	(1,049		)	(39		)	407,941
Balance, end of period, net of tax	$	1,226,295		$	(55,235	)	$	(52,942	)	$	(25,690	)	$	2,129		$	1,094,557
Three months ended March 31, 2015 (U.S. dollars in thousands)
Balance, beginning of period, net of tax	$	1,590,114		$	(76,047	)	$	(11,188	)	$	(20,789	)	$	2,368		$	1,484,458
OCI before reclassifications	254,267			—			32,404			975			—			287,646
Amounts reclassified from AOCI	(74,781		)	9,936			—			—			95			(64,750		)
Tax benefit (expense)	(5,805		)	(78		)	3,699			—			—			(2,184		)
Net current period OCI - net of tax	173,681			9,858			36,103			975			95			220,712
Balance, end of period, net of tax	$	1,763,795		$	(66,189	)	$	24,915		$	(19,814	)	$	2,463		$	1,705,170

____________

(1) For certain annuity contracts that are subject to the GreyCastle Life Retro Arrangements, policy benefit reserves were historically increased for the impact of changes in unrealized gains on investments supporting such contracts as if the gains had been realized, with a corresponding entry to other comprehensive income ("Shadow Adjustments"). As of December 31, 2015, the cumulative impact of the Shadow Adjustments was $274.4 million. During the three months ended March 31, 2016, net movements of $(17.0) million were recorded, resulting in a total cumulative net impact of Shadow Adjustments on future policy benefit reserves of $257.4 million as of March 31, 2016.

Reclassification out of Accumulated Other Comprehensive Income

The reclassifications out of AOCI along with the associated income statement line items affected by component, and the total related tax (expense) benefit for the three months ended March 31, 2016 and 2015 are as follows:

Gross Amount Reclassified From AOCI
Details About AOCI Components (U.S. dollars in thousands)	Three months ended March 31, 2016			Three months ended March 31, 2015			Affected Line Item in the Statement of Income
Unrealized gains and losses on investments:
	$	(116,988	)	$	(78,551	)	Net realized gains (losses) on investments sold and net unrealized gains (losses) on investments Trading
	21,928			15,724			OTTI on investments
	$	(22,054	)	$	(11,954	)	Net realized and unrealized gains (losses) on life retrocession embedded derivative and derivative instruments - Life Funds Withheld Assets
	$	(117,114	)	$	(74,781	)	Total before tax
	1,577			87			Provision (benefit) for income tax
	$	(115,537	)	$	(74,694	)	Net of tax
OTTI losses recognized in OCI:
	$	2,313		$	9,875		Net realized gains (losses) on investments sold
	(2		)	61			OTTI on investments transferred to (from) OCI
	$	2,311		$	9,936		Total before tax
	(44		)	(3		)	Provision (benefit) for income tax
	$	2,267		$	9,933		Net of tax
Gains and losses on cash flow hedges:
Interest rate contracts	$	(39	)	$	95		Interest Expense
	—			—			Provision (benefit) for income tax
	$	(39	)	$	95		Net of tax
Total reclassifications for the period, gross of tax	$	(114,842	)	$	(64,750	)
Tax benefit (expense)	1,533			84
Total reclassifications for the period, net of tax	$	(113,309	)	$	(64,666	)

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Acquisition and Disposals - Allied - Acquisition Consideration (Narrative) (Details) - USD ($) $ in Thousands		3 Months Ended
	Feb. 01, 2016	Mar. 31, 2016
Business Acquisition [Line Items]
Indefinite-lived intangible assets acquired during the period		$ 8,000
Finite-lived intangible assets acquired		6,000
Goodwill acquired during the period		$ 13,946
Allied International Holdings, Inc.
Business Acquisition [Line Items]
Cash consideration	$ 75,600
Contingent Consideration Measurement Period	3 years
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, Low	$ 7,500
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High	30,000
Business Combination, Contingent Consideration, Liability	15,000
Total acquisition consideration	90,600
Fair value of net assets acquired and liabilities assumed	76,700
Indefinite-lived intangible assets acquired during the period	8,000
Finite-lived intangible assets acquired	6,000
Goodwill acquired during the period	13,946
Business Combination Measurement Period		12 months
Allied International Holdings, Inc. | Insurance Segment
Business Acquisition [Line Items]
Goodwill acquired during the period	$ 13,946

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Acquisition and Disposals - New Energy Risk narrative (Details) - USD ($) $ in Thousands		3 Months Ended
	Jul. 24, 2015	Mar. 31, 2016
Business Acquisition [Line Items]
Goodwill acquired during the period		$ 13,946
New Energy Risk Inc.
Business Acquisition [Line Items]
Percentage of voting interests acquired	63.63%
Original ownership percentage	31.16%
Ownership percentage following additional purchase of shares	94.79%
Ownership percentage held by noncontrolling interest	5.21%
Cash consideration	$ 8,800
Gain on fair value adjustment	2,500
Goodwill acquired during the period	$ 13,400

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Acquisition and Disposals - Catlin - Overview (Details) £ / shares in Units, $ / shares in Units, £ in Millions, $ in Billions	May. 01, 2015 USD ($) shares $ / shares	May. 01, 2015 GBP (£) shares £ / shares	Mar. 31, 2016 $ / shares	Dec. 31, 2015 $ / shares
Business Acquisition [Line Items]
Ordinary shares, par value (in dollars per share) | $ / shares			$ 0.01	$ 0.01
Catlin Group Limited
Business Acquisition [Line Items]
Total acquisition consideration | $	$ 4.1
Ordinary shares, par value (in dollars per share) | $ / shares	$ 0.01
Cash price component, per share in GBP | £ / shares		£ 3.88
Exchange ratio per the merger agreement | shares	0.13	0.13
Share issuance to Catlin shareholders | shares	49,900,000	49,900,000
Cash consideration | £		£ 1,490

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Acquisition and Disposals - Catlin - Fair value of assets and liabilities acquired (Narrative) (Details) - USD ($) $ in Thousands		3 Months Ended
	May. 01, 2015	Mar. 31, 2016
Business Acquisition [Line Items]
Goodwill		$ 13,946
Indefinite-lived intangible assets acquired during the period		8,000
Finite-lived intangible assets acquired		$ 6,000
Catlin Group Limited
Business Acquisition [Line Items]
Goodwill	$ 794,000
Indefinite-lived intangible assets acquired during the period	673,000
Finite-lived intangible assets acquired	315,000
Business Combination Measurement Period		12 months
Value of Business Acquired Adjustment, Amortization Period		2 years
Intangibles Assets Arising from Insurance Contracts Acquired in Business Combination, Amortization Expense		$ 59,600
Unpaid Losses And Loss Expenses Adjustment Amortization Period		20 years
Catlin Group Limited | Insurance Segment
Business Acquisition [Line Items]
Goodwill	466,100
Catlin Group Limited | Reinsurance Segment
Business Acquisition [Line Items]
Goodwill	$ 327,900

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Acquisition and Disposals - Catlin - Transaction related costs (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2016 USD ($)
Business Combination, Separately Recognized Transactions [Line Items]
Liabilities at December 31, 2015	$ 57,289
Costs incurred in 2016	54,987
2016 payments	51,344
Liabilities at March 31, 2016	60,932
Severance related costs
Business Combination, Separately Recognized Transactions [Line Items]
Liabilities at December 31, 2015	16,127
Costs incurred in 2016	16,758
2016 payments	16,535
Liabilities at March 31, 2016	16,350
Retention and other compensation costs
Business Combination, Separately Recognized Transactions [Line Items]
Liabilities at December 31, 2015	16,969
Costs incurred in 2016	8,006
2016 payments	17,466
Liabilities at March 31, 2016	7,509
Facilities-related costs
Business Combination, Separately Recognized Transactions [Line Items]
Liabilities at December 31, 2015	818
Costs incurred in 2016	6,103
2016 payments	1,040
Liabilities at March 31, 2016	5,881
Consulting and other
Business Combination, Separately Recognized Transactions [Line Items]
Liabilities at December 31, 2015	23,375
Costs incurred in 2016	24,120
2016 payments	16,303
Liabilities at March 31, 2016	$ 31,192

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Acquisition and Disposals - Sale of strategic operating affiliate (Details) - ARX Holding Corporation - USD ($) $ in Millions	Apr. 02, 2015	Apr. 01, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Equity method investment, ownership percentage		40.60%
Investment in affiliates		$ 220.2
Consideration received		$ 560.6
Gain on disposal	$ 340.4

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Fair Value Measurements - Schedule of assets and liabilities that were accounted for at fair value (Details) - USD ($) $ in Thousands		Mar. 31, 2016	Dec. 31, 2015
Assets
Fixed maturities, at fair value		$ 32,647,573	$ 32,257,589
Equity securities, at fair value		878,407	878,919
Short-term investments, at fair value		317,304	617,390
Total investments available for sale		33,843,284	33,753,898
Fixed maturities, trading at fair value		1,409,583	1,235,699
Short-term investments, trading at fair value		26,959	60,330
Total investments, trading		1,436,542	1,296,029
Collateral and counterparty netting, assets	[1],[2]	(37,870)	(3,087)
Liabilities
Funds withheld on life retrocession arrangements (net of future policy benefit reserves recoverable)		998,391	914,629
Collateral and counterparty nettings, liabilities	[1],[2]	(37,870)	(3,087)
Recurring
Assets
Total investments available for sale		33,843,284	33,753,898
Cash equivalents	[3]	1,177,119	1,268,666
Other investments	[4]	1,312,431	1,291,726
Other assets	[2]	38,734	86,227
Total assets accounted for at fair value		37,900,554	37,797,820
Liabilities
Funds withheld on life retrocession arrangements (net of future policy benefit reserves recoverable)	[5]	681,811	463,915
Financial instruments sold, but not yet purchased	[6]	2,180	347
Other liabilities	[2]	50,818	42,408
Total liabilities accounted for at fair value		734,809	506,670
Recurring | Quoted prices in active markets for identical assets (Level 1)
Assets
Total investments available for sale		532,672	528,581
Cash equivalents	[3]	295,962	437,742
Other investments	[4]	0	0
Other assets	[2]	0	0
Total assets accounted for at fair value		828,634	966,840
Liabilities
Funds withheld on life retrocession arrangements (net of future policy benefit reserves recoverable)	[5]	0	0
Financial instruments sold, but not yet purchased	[6]	2,180	347
Other liabilities	[2]	0	0
Total liabilities accounted for at fair value		2,180	347
Recurring | Significant other observable inputs (Level 2)
Assets
Total investments available for sale		33,193,126	33,073,039
Cash equivalents	[3]	881,157	830,924
Other investments	[4]	1,011,336	1,008,176
Other assets	[2]	56,118	69,914
Total assets accounted for at fair value		36,670,723	36,378,839
Liabilities
Funds withheld on life retrocession arrangements (net of future policy benefit reserves recoverable)	[5]	681,811	463,915
Financial instruments sold, but not yet purchased	[6]	0	0
Other liabilities	[2]	58,350	16,304
Total liabilities accounted for at fair value		740,161	480,219
Recurring | Significant other unobservable inputs (Level 3)
Assets
Total investments available for sale		117,486	152,278
Cash equivalents	[3]	0	0
Other investments	[4]	301,095	283,550
Other assets	[2]	20,486	19,400
Total assets accounted for at fair value		439,067	455,228
Liabilities
Funds withheld on life retrocession arrangements (net of future policy benefit reserves recoverable)	[5]	0	0
Financial instruments sold, but not yet purchased	[6]	0	0
Other liabilities	[2]	30,338	29,191
Total liabilities accounted for at fair value		30,338	29,191
Excluding Life Funds Withheld Assets
Assets
Fixed maturities, at fair value		29,684,216	29,104,486
Equity securities, at fair value		878,407	878,919
Short-term investments, at fair value		317,304	617,390
Total investments available for sale		30,879,927	30,600,795
Excluding Life Funds Withheld Assets | U.S. Government and Government - Related/Supported
Assets
Fixed maturities, at fair value		4,576,987	5,065,637
Excluding Life Funds Withheld Assets | RMBS - Agency
Assets
Fixed maturities, at fair value		4,367,007	3,757,971
Excluding Life Funds Withheld Assets | RMBS - Non-Agency
Assets
Fixed maturities, at fair value		302,843	328,540
Excluding Life Funds Withheld Assets | Commercial mortgage-backed securities
Assets
Fixed maturities, at fair value		325,485	405,316
Excluding Life Funds Withheld Assets | Collateralized debt obligations
Assets
Fixed maturities, at fair value		21,729	32,410
Excluding Life Funds Withheld Assets | Other asset-backed securities
Assets
Fixed maturities, at fair value		1,162,898	1,168,572
Excluding Life Funds Withheld Assets | US States and political subdivisions of the States
Assets
Fixed maturities, at fair value		2,584,747	2,632,070
Excluding Life Funds Withheld Assets | Non-U.S. Sovereign Government, Provincial, Supranational, and Government-Related/Supported
Assets
Fixed maturities, at fair value		5,546,695	5,251,614
Excluding Life Funds Withheld Assets | Recurring
Assets
Fixed maturities, at fair value		29,684,216	29,104,486
Equity securities, at fair value		878,407	878,919
Short-term investments, at fair value	[7]	317,304	617,390
Total investments available for sale		30,879,927	30,600,795
Excluding Life Funds Withheld Assets | Recurring | U.S. Government and Government - Related/Supported
Assets
Fixed maturities, at fair value		4,576,987	5,065,637
Excluding Life Funds Withheld Assets | Recurring | RMBS - Agency
Assets
Fixed maturities, at fair value		4,367,007	3,757,971
Excluding Life Funds Withheld Assets | Recurring | RMBS - Non-Agency
Assets
Fixed maturities, at fair value		302,843	328,540
Excluding Life Funds Withheld Assets | Recurring | Commercial mortgage-backed securities
Assets
Fixed maturities, at fair value		325,485	405,316
Excluding Life Funds Withheld Assets | Recurring | Collateralized debt obligations
Assets
Fixed maturities, at fair value		21,729	32,410
Excluding Life Funds Withheld Assets | Recurring | Other asset-backed securities
Assets
Fixed maturities, at fair value		1,162,898	1,168,572
Excluding Life Funds Withheld Assets | Recurring | US States and political subdivisions of the States
Assets
Fixed maturities, at fair value		2,584,747	2,632,070
Excluding Life Funds Withheld Assets | Recurring | Non-U.S. Sovereign Government, Provincial, Supranational, and Government-Related/Supported
Assets
Fixed maturities, at fair value		5,546,695	5,251,614
Excluding Life Funds Withheld Assets | Recurring | Quoted prices in active markets for identical assets (Level 1)
Assets
Fixed maturities, at fair value		0	0
Equity securities, at fair value		532,672	528,581
Short-term investments, at fair value	[7]	0	0
Total investments available for sale		532,672	528,581
Excluding Life Funds Withheld Assets | Recurring | Quoted prices in active markets for identical assets (Level 1) | U.S. Government and Government - Related/Supported
Assets
Fixed maturities, at fair value		0	0
Excluding Life Funds Withheld Assets | Recurring | Quoted prices in active markets for identical assets (Level 1) | RMBS - Agency
Assets
Fixed maturities, at fair value		0	0
Excluding Life Funds Withheld Assets | Recurring | Quoted prices in active markets for identical assets (Level 1) | RMBS - Non-Agency
Assets
Fixed maturities, at fair value		0	0
Excluding Life Funds Withheld Assets | Recurring | Quoted prices in active markets for identical assets (Level 1) | Commercial mortgage-backed securities
Assets
Fixed maturities, at fair value		0	0
Excluding Life Funds Withheld Assets | Recurring | Quoted prices in active markets for identical assets (Level 1) | Collateralized debt obligations
Assets
Fixed maturities, at fair value		0	0
Excluding Life Funds Withheld Assets | Recurring | Quoted prices in active markets for identical assets (Level 1) | Other asset-backed securities
Assets
Fixed maturities, at fair value		0	0
Excluding Life Funds Withheld Assets | Recurring | Quoted prices in active markets for identical assets (Level 1) | US States and political subdivisions of the States
Assets
Fixed maturities, at fair value		0	0
Excluding Life Funds Withheld Assets | Recurring | Quoted prices in active markets for identical assets (Level 1) | Non-U.S. Sovereign Government, Provincial, Supranational, and Government-Related/Supported
Assets
Fixed maturities, at fair value		0	0
Excluding Life Funds Withheld Assets | Recurring | Significant other observable inputs (Level 2)
Assets
Fixed maturities, at fair value		29,566,730	28,952,208
Equity securities, at fair value		345,735	350,338
Short-term investments, at fair value	[7]	317,304	617,390
Total investments available for sale		30,229,769	29,919,936
Excluding Life Funds Withheld Assets | Recurring | Significant other observable inputs (Level 2) | U.S. Government and Government - Related/Supported
Assets
Fixed maturities, at fair value		4,532,047	5,020,574
Excluding Life Funds Withheld Assets | Recurring | Significant other observable inputs (Level 2) | RMBS - Agency
Assets
Fixed maturities, at fair value		4,364,154	3,754,894
Excluding Life Funds Withheld Assets | Recurring | Significant other observable inputs (Level 2) | RMBS - Non-Agency
Assets
Fixed maturities, at fair value		302,843	328,540
Excluding Life Funds Withheld Assets | Recurring | Significant other observable inputs (Level 2) | Commercial mortgage-backed securities
Assets
Fixed maturities, at fair value		325,485	405,316
Excluding Life Funds Withheld Assets | Recurring | Significant other observable inputs (Level 2) | Collateralized debt obligations
Assets
Fixed maturities, at fair value		0	2
Excluding Life Funds Withheld Assets | Recurring | Significant other observable inputs (Level 2) | Other asset-backed securities
Assets
Fixed maturities, at fair value		1,158,698	1,150,715
Excluding Life Funds Withheld Assets | Recurring | Significant other observable inputs (Level 2) | US States and political subdivisions of the States
Assets
Fixed maturities, at fair value		2,584,747	2,632,070
Excluding Life Funds Withheld Assets | Recurring | Significant other observable inputs (Level 2) | Non-U.S. Sovereign Government, Provincial, Supranational, and Government-Related/Supported
Assets
Fixed maturities, at fair value		5,546,695	5,251,614
Excluding Life Funds Withheld Assets | Recurring | Significant other unobservable inputs (Level 3)
Assets
Fixed maturities, at fair value		$ 117,486	152,278
Equity securities, at fair value			0
Short-term investments, at fair value	[7]	$ 0	0
Total investments available for sale		117,486	152,278
Excluding Life Funds Withheld Assets | Recurring | Significant other unobservable inputs (Level 3) | U.S. Government and Government - Related/Supported
Assets
Fixed maturities, at fair value		44,940	45,063
Excluding Life Funds Withheld Assets | Recurring | Significant other unobservable inputs (Level 3) | RMBS - Agency
Assets
Fixed maturities, at fair value		2,853	3,077
Excluding Life Funds Withheld Assets | Recurring | Significant other unobservable inputs (Level 3) | RMBS - Non-Agency
Assets
Fixed maturities, at fair value		0	0
Excluding Life Funds Withheld Assets | Recurring | Significant other unobservable inputs (Level 3) | Commercial mortgage-backed securities
Assets
Fixed maturities, at fair value		0	0
Excluding Life Funds Withheld Assets | Recurring | Significant other unobservable inputs (Level 3) | Collateralized debt obligations
Assets
Fixed maturities, at fair value		21,729	32,408
Excluding Life Funds Withheld Assets | Recurring | Significant other unobservable inputs (Level 3) | Other asset-backed securities
Assets
Fixed maturities, at fair value		4,200	17,857
Excluding Life Funds Withheld Assets | Recurring | Significant other unobservable inputs (Level 3) | US States and political subdivisions of the States
Assets
Fixed maturities, at fair value		0	0
Excluding Life Funds Withheld Assets | Recurring | Significant other unobservable inputs (Level 3) | Non-U.S. Sovereign Government, Provincial, Supranational, and Government-Related/Supported
Assets
Fixed maturities, at fair value		0	0
Life Funds Withheld Assets
Assets
Fixed maturities, at fair value		2,963,357	3,153,103
Fixed maturities, trading at fair value		1,409,583	1,235,699
Short-term investments, trading at fair value		26,959	60,330
Total investments, trading		1,436,542	1,296,029
Life Funds Withheld Assets | U.S. Government and Government - Related/Supported
Assets
Fixed maturities, at fair value		12,692	12,742
Fixed maturities, trading at fair value		15,267	4,990
Life Funds Withheld Assets | RMBS - Agency
Assets
Fixed maturities, at fair value		733	752
Fixed maturities, trading at fair value		1,869	368
Life Funds Withheld Assets | RMBS - Non-Agency
Assets
Fixed maturities, at fair value		25,829	26,953
Life Funds Withheld Assets | Commercial mortgage-backed securities
Assets
Fixed maturities, at fair value		108,914	122,481
Fixed maturities, trading at fair value		4,760	4,803
Life Funds Withheld Assets | Other asset-backed securities
Assets
Fixed maturities, at fair value		121,721	149,795
Fixed maturities, trading at fair value		25,615	25,700
Life Funds Withheld Assets | Non-U.S. Sovereign Government, Provincial, Supranational, and Government-Related/Supported
Assets
Fixed maturities, at fair value		876,927	933,516
Fixed maturities, trading at fair value		421,033	370,261
Life Funds Withheld Assets | Recurring
Assets
Fixed maturities, at fair value		2,963,357	3,153,103
Fixed maturities, trading at fair value		1,409,583	1,235,699
Short-term investments, trading at fair value	[7]	26,959	60,330
Total investments, trading		1,436,542	1,296,029
Cash equivalents	[3]	92,444	101,274
Life Funds Withheld Assets | Recurring | U.S. Government and Government - Related/Supported
Assets
Fixed maturities, at fair value		12,692	12,742
Fixed maturities, trading at fair value		15,267	4,990
Life Funds Withheld Assets | Recurring | RMBS - Agency
Assets
Fixed maturities, at fair value		733	752
Fixed maturities, trading at fair value		1,869	368
Life Funds Withheld Assets | Recurring | RMBS - Non-Agency
Assets
Fixed maturities, at fair value		25,829	26,953
Life Funds Withheld Assets | Recurring | Commercial mortgage-backed securities
Assets
Fixed maturities, at fair value		108,914	122,481
Fixed maturities, trading at fair value		4,760	4,803
Life Funds Withheld Assets | Recurring | Other asset-backed securities
Assets
Fixed maturities, at fair value		121,721	149,795
Fixed maturities, trading at fair value		25,615	25,700
Life Funds Withheld Assets | Recurring | Non-U.S. Sovereign Government, Provincial, Supranational, and Government-Related/Supported
Assets
Fixed maturities, at fair value		876,927	933,516
Fixed maturities, trading at fair value		421,033	370,261
Life Funds Withheld Assets | Recurring | Quoted prices in active markets for identical assets (Level 1)
Assets
Fixed maturities, at fair value		0	0
Fixed maturities, trading at fair value		0	0
Short-term investments, trading at fair value	[7]	0	0
Total investments, trading		0	0
Cash equivalents	[3]	0	517
Life Funds Withheld Assets | Recurring | Quoted prices in active markets for identical assets (Level 1) | U.S. Government and Government - Related/Supported
Assets
Fixed maturities, at fair value		0	0
Fixed maturities, trading at fair value		0	0
Life Funds Withheld Assets | Recurring | Quoted prices in active markets for identical assets (Level 1) | RMBS - Agency
Assets
Fixed maturities, at fair value		0	0
Fixed maturities, trading at fair value		0	0
Life Funds Withheld Assets | Recurring | Quoted prices in active markets for identical assets (Level 1) | RMBS - Non-Agency
Assets
Fixed maturities, at fair value		0	0
Life Funds Withheld Assets | Recurring | Quoted prices in active markets for identical assets (Level 1) | Commercial mortgage-backed securities
Assets
Fixed maturities, at fair value		0	0
Fixed maturities, trading at fair value		0	0
Life Funds Withheld Assets | Recurring | Quoted prices in active markets for identical assets (Level 1) | Other asset-backed securities
Assets
Fixed maturities, at fair value		0	0
Fixed maturities, trading at fair value		0	0
Life Funds Withheld Assets | Recurring | Quoted prices in active markets for identical assets (Level 1) | Non-U.S. Sovereign Government, Provincial, Supranational, and Government-Related/Supported
Assets
Fixed maturities, at fair value		0	0
Fixed maturities, trading at fair value		0	0
Life Funds Withheld Assets | Recurring | Significant other observable inputs (Level 2)
Assets
Fixed maturities, at fair value		2,963,357	3,153,103
Fixed maturities, trading at fair value		1,409,583	1,235,699
Short-term investments, trading at fair value	[7]	26,959	60,330
Total investments, trading		1,436,542	1,296,029
Cash equivalents	[3]	92,444	100,757
Life Funds Withheld Assets | Recurring | Significant other observable inputs (Level 2) | U.S. Government and Government - Related/Supported
Assets
Fixed maturities, at fair value		12,692	12,742
Fixed maturities, trading at fair value		15,267	4,990
Life Funds Withheld Assets | Recurring | Significant other observable inputs (Level 2) | RMBS - Agency
Assets
Fixed maturities, at fair value		733	752
Fixed maturities, trading at fair value		1,869	368
Life Funds Withheld Assets | Recurring | Significant other observable inputs (Level 2) | RMBS - Non-Agency
Assets
Fixed maturities, at fair value		25,829	26,953
Life Funds Withheld Assets | Recurring | Significant other observable inputs (Level 2) | Commercial mortgage-backed securities
Assets
Fixed maturities, at fair value		108,914	122,481
Fixed maturities, trading at fair value		4,760	4,803
Life Funds Withheld Assets | Recurring | Significant other observable inputs (Level 2) | Other asset-backed securities
Assets
Fixed maturities, at fair value		121,721	149,795
Fixed maturities, trading at fair value		25,615	25,700
Life Funds Withheld Assets | Recurring | Significant other observable inputs (Level 2) | Non-U.S. Sovereign Government, Provincial, Supranational, and Government-Related/Supported
Assets
Fixed maturities, at fair value		876,927	933,516
Fixed maturities, trading at fair value		421,033	370,261
Life Funds Withheld Assets | Recurring | Significant other unobservable inputs (Level 3)
Assets
Fixed maturities, at fair value		0	0
Fixed maturities, trading at fair value		0	0
Short-term investments, trading at fair value	[7]	0	0
Total investments, trading		0	0
Cash equivalents	[3]	0	0
Life Funds Withheld Assets | Recurring | Significant other unobservable inputs (Level 3) | U.S. Government and Government - Related/Supported
Assets
Fixed maturities, at fair value		0	0
Fixed maturities, trading at fair value		0	0
Life Funds Withheld Assets | Recurring | Significant other unobservable inputs (Level 3) | RMBS - Agency
Assets
Fixed maturities, at fair value		0	0
Fixed maturities, trading at fair value		0	0
Life Funds Withheld Assets | Recurring | Significant other unobservable inputs (Level 3) | RMBS - Non-Agency
Assets
Fixed maturities, at fair value		0	0
Life Funds Withheld Assets | Recurring | Significant other unobservable inputs (Level 3) | Commercial mortgage-backed securities
Assets
Fixed maturities, at fair value		0	0
Fixed maturities, trading at fair value		0	0
Life Funds Withheld Assets | Recurring | Significant other unobservable inputs (Level 3) | Other asset-backed securities
Assets
Fixed maturities, at fair value		0	0
Fixed maturities, trading at fair value		0	0
Life Funds Withheld Assets | Recurring | Significant other unobservable inputs (Level 3) | Non-U.S. Sovereign Government, Provincial, Supranational, and Government-Related/Supported
Assets
Fixed maturities, at fair value		0	0
Fixed maturities, trading at fair value		0	0
Financial Services Sector | Excluding Life Funds Withheld Assets | Corporate
Assets
Fixed maturities, at fair value		3,704,315	3,561,909
Financial Services Sector | Excluding Life Funds Withheld Assets | Recurring | Corporate
Assets
Fixed maturities, at fair value		3,704,315	3,561,909
Financial Services Sector | Excluding Life Funds Withheld Assets | Recurring | Quoted prices in active markets for identical assets (Level 1) | Corporate
Assets
Fixed maturities, at fair value		0	0
Financial Services Sector | Excluding Life Funds Withheld Assets | Recurring | Significant other observable inputs (Level 2) | Corporate
Assets
Fixed maturities, at fair value		3,660,732	3,508,224
Financial Services Sector | Excluding Life Funds Withheld Assets | Recurring | Significant other unobservable inputs (Level 3) | Corporate
Assets
Fixed maturities, at fair value		43,583	53,685
Financial Services Sector | Life Funds Withheld Assets | Corporate
Assets
Fixed maturities, at fair value		547,279	598,236
Fixed maturities, trading at fair value		382,755	335,956
Financial Services Sector | Life Funds Withheld Assets | Recurring | Corporate
Assets
Fixed maturities, at fair value		547,279	598,236
Fixed maturities, trading at fair value		382,755	335,956
Financial Services Sector | Life Funds Withheld Assets | Recurring | Quoted prices in active markets for identical assets (Level 1) | Corporate
Assets
Fixed maturities, at fair value		0	0
Fixed maturities, trading at fair value		0	0
Financial Services Sector | Life Funds Withheld Assets | Recurring | Significant other observable inputs (Level 2) | Corporate
Assets
Fixed maturities, at fair value		547,279	598,236
Fixed maturities, trading at fair value		382,755	335,956
Financial Services Sector | Life Funds Withheld Assets | Recurring | Significant other unobservable inputs (Level 3) | Corporate
Assets
Fixed maturities, at fair value		0	0
Fixed maturities, trading at fair value		0	0
Non-Financial Services Sector | Excluding Life Funds Withheld Assets | Corporate
Assets
Fixed maturities, at fair value		7,091,510	6,900,447
Non-Financial Services Sector | Excluding Life Funds Withheld Assets | Recurring | Corporate
Assets
Fixed maturities, at fair value		7,091,510	6,900,447
Non-Financial Services Sector | Excluding Life Funds Withheld Assets | Recurring | Quoted prices in active markets for identical assets (Level 1) | Corporate
Assets
Fixed maturities, at fair value		0	0
Non-Financial Services Sector | Excluding Life Funds Withheld Assets | Recurring | Significant other observable inputs (Level 2) | Corporate
Assets
Fixed maturities, at fair value		7,091,329	6,900,259
Non-Financial Services Sector | Excluding Life Funds Withheld Assets | Recurring | Significant other unobservable inputs (Level 3) | Corporate
Assets
Fixed maturities, at fair value		181	188
Non-Financial Services Sector | Life Funds Withheld Assets | Corporate
Assets
Fixed maturities, at fair value		1,269,262	1,308,628
Fixed maturities, trading at fair value		558,284	493,621
Non-Financial Services Sector | Life Funds Withheld Assets | Recurring | Corporate
Assets
Fixed maturities, at fair value		1,269,262	1,308,628
Fixed maturities, trading at fair value		558,284	493,621
Non-Financial Services Sector | Life Funds Withheld Assets | Recurring | Quoted prices in active markets for identical assets (Level 1) | Corporate
Assets
Fixed maturities, at fair value		0	0
Fixed maturities, trading at fair value		0	0
Non-Financial Services Sector | Life Funds Withheld Assets | Recurring | Significant other observable inputs (Level 2) | Corporate
Assets
Fixed maturities, at fair value		1,269,262	1,308,628
Fixed maturities, trading at fair value		558,284	493,621
Non-Financial Services Sector | Life Funds Withheld Assets | Recurring | Significant other unobservable inputs (Level 3) | Corporate
Assets
Fixed maturities, at fair value		0	0
Fixed maturities, trading at fair value		$ 0	$ 0

[1] Derivative instruments in an asset or liability position are included within Other assets or Other liabilities, respectively, in the balance sheets on a net basis where the Company has both a legal right of offset and the intention to settle the contracts on a net basis. The Company often enters into different types of derivative contracts with a single counterparty and these contracts are covered under netting agreements.

[2] Other assets and other liabilities include derivative instruments. The derivative balances included in each category are reported on a gross basis by level with a netting adjustment presented separately in the Collateral and Counterparty Netting column. The fair values of the individual derivative contracts are reported gross in their respective levels based on the fair value hierarchy. For further details regarding derivative fair values and associated collateral received or paid, see Note 7, "Derivative Instruments.

[3] Cash equivalents balances subject to fair value measurement include certificates of deposit and money market funds. Operating cash balances are not subject to recurring fair value measurement guidance.

[4] The Other investments balance excludes certain structured transactions including certain investments in project finance transactions, and a payment obligation and liquidity financing provided to a structured credit vehicle as a part of a third party medium term note facility. These investments, which totaled $141.5 million as of March 31, 2016 and $141.3 million as of December 31, 2015, are carried at amortized cost. For further information, see Item 8, Note 8, "Other Investments," to the Consolidated Financial Statements included in our Annual Report on Form 10-K for the year ended December 31, 2015.

[5] Funds withheld on GreyCastle life retrocession arrangements (net of future policy benefit reserves recoverable) include balances related to the life retrocession embedded derivative, under which all investment results associated with the Life Funds Withheld Assets related to the GreyCastle Life Retro Arrangements described in Note 1, "Basis of Preparation and Consolidation," accrue to the benefit of GCLR.

[6] Financial instruments sold, but not yet purchased, represent "short sales" and are included within "Payable for investments purchased" on the balance sheets.

[7] Short-term investments consist primarily of Corporate securities and U.S. and Non-U.S. Government and Government-Related/Supported securities.

XML

Fair Value Measurements - Additional information about assets and liabilities measured at fair value on a recurring basis (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Derivative contracts - net
Level 3 liabilities
Balance, beginning of period	$ (9,791)	$ (9,764)
Realized gains (losses)	0	0
Movement in unrealized gains (losses)	(61)	158
Purchases and issuances	0	0
Sales	0	0
Settlements	0	0
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Balance, end of period	(9,852)	(9,606)
Movement in total gains (losses) above relating to instruments still held at the reporting date	(61)	158
Financial Services Sector
Level 3 assets
Balance, end of period		0
U.S. Government
Level 3 assets
Balance, beginning of period	45,063	0
Realized gains (losses)	(37)	0
Movement in unrealized gains (losses)	593	0
Purchases and issuances	0	0
Sales	0	0
Settlements	(679)	0
Transfers into Level 3	0	0
Transfers out of Level 3	$ 0	0
Fixed maturities to short-term investments classification change		0
Balance, end of period	$ 44,940
Movement in total gains (losses) above relating to instruments still held at the reporting date	554	0
Corporate | Financial Services Sector
Level 3 assets
Balance, beginning of period	53,685	0
Realized gains (losses)	53	0
Movement in unrealized gains (losses)	(39)	0
Purchases and issuances	169	0
Sales	0	0
Settlements	0	0
Transfers into Level 3	0	0
Transfers out of Level 3	(10,285)	0
Fixed maturities to short-term investments classification change	0	0
Balance, end of period	43,583	0
Movement in total gains (losses) above relating to instruments still held at the reporting date	15	0
Corporate | Non-Financial Services Sector
Level 3 assets
Balance, beginning of period	188	5,894
Realized gains (losses)	0	(1)
Movement in unrealized gains (losses)	(1)	48
Purchases and issuances	0	0
Sales	0	0
Settlements	(6)	(80)
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Fixed maturities to short-term investments classification change	0	0
Balance, end of period	181	5,861
Movement in total gains (losses) above relating to instruments still held at the reporting date	(1)	48
RMBS - Agency
Level 3 assets
Balance, beginning of period	3,077	1,910
Realized gains (losses)	(3)	0
Movement in unrealized gains (losses)	7	(1)
Purchases and issuances	0	0
Sales	0	0
Settlements	(228)	(89)
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Fixed maturities to short-term investments classification change	0	0
Balance, end of period	2,853	1,820
Movement in total gains (losses) above relating to instruments still held at the reporting date	4	(1)
RMBS - Non-Agency
Level 3 assets
Balance, beginning of period	0	0
Realized gains (losses)	0	0
Movement in unrealized gains (losses)	0	0
Purchases and issuances	0	0
Sales	0	0
Settlements	0	0
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Fixed maturities to short-term investments classification change	0	0
Balance, end of period	0	0
Movement in total gains (losses) above relating to instruments still held at the reporting date	0	0
Commercial mortgage-backed securities
Level 3 assets
Balance, beginning of period	0	0
Realized gains (losses)	0	0
Movement in unrealized gains (losses)	0	0
Purchases and issuances	0	0
Sales	0	0
Settlements	0	0
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Fixed maturities to short-term investments classification change	0	0
Balance, end of period	0	0
Movement in total gains (losses) above relating to instruments still held at the reporting date	0	0
Collateralized debt obligations
Level 3 assets
Balance, beginning of period	32,408	687,958
Realized gains (losses)	41	36
Movement in unrealized gains (losses)	5,257	5,555
Purchases and issuances	0	0
Sales	0	(155,085)
Settlements	(15,977)	(41,541)
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Fixed maturities to short-term investments classification change	0	0
Balance, end of period	21,729	496,923
Movement in total gains (losses) above relating to instruments still held at the reporting date	5,297	2,668
Other asset-backed securities
Level 3 assets
Balance, beginning of period	17,857	5,288
Realized gains (losses)	1,049	(1)
Movement in unrealized gains (losses)	(2,758)	2
Purchases and issuances	0	0
Sales	0	0
Settlements	(11,948)	(3,045)
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Fixed maturities to short-term investments classification change	0	0
Balance, end of period	4,200	2,244
Movement in total gains (losses) above relating to instruments still held at the reporting date	(1,708)	0
Non-U.S. Government
Level 3 assets
Balance, beginning of period	0	0
Realized gains (losses)	0
Movement in unrealized gains (losses)	0	0
Purchases and issuances	0
Sales	0	0
Settlements	0	0
Transfers into Level 3	0	0
Transfers out of Level 3	0
Fixed maturities to short-term investments classification change	0	0
Balance, end of period	0	0
Movement in total gains (losses) above relating to instruments still held at the reporting date	0	0
Short-term investments
Level 3 assets
Balance, beginning of period	0	0
Realized gains (losses)	0	0
Movement in unrealized gains (losses)	0	0
Purchases and issuances	0	0
Sales	0	0
Settlements	0	0
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Fixed maturities to short-term investments classification change	0	0
Balance, end of period	0	0
Movement in total gains (losses) above relating to instruments still held at the reporting date	0	0
Other investments
Level 3 assets
Balance, beginning of period	283,550	185,083
Realized gains (losses)	5,807	1,302
Movement in unrealized gains (losses)	(2,717)	(1,827)
Purchases and issuances	13,779	6,793
Sales	0
Settlements	(14,818)	(1,254)
Transfers into Level 3	15,494	0
Transfers out of Level 3	0	0
Fixed maturities to short-term investments classification change	0	0
Balance, end of period	301,095	190,097
Movement in total gains (losses) above relating to instruments still held at the reporting date	$ 3,090	$ (524)

XML

Fair Value Measurements - Financial instruments not carried at fair value (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Deposit liabilities	$ 1,170,595	$ 1,168,376
Notes payable and debt	2,653,895	2,644,970
Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Assets	141,459	141,329
Deposit liabilities	1,171,655	1,168,376
Notes payable and debt	2,645,647	2,644,970
Financial Liabilities	3,817,302	3,813,346
Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Assets	153,844	154,065
Deposit liabilities	1,478,856	1,436,210
Notes payable and debt	2,815,562	2,805,152
Financial Liabilities	$ 4,294,418	$ 4,241,362

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Fair Value Measurements - Narrative (Details) - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other investments - structured transactions	$ 141.5	$ 141.3
Spread on U.S. treasury for discounting deposit liabilities	0.38%	0.265%

XML

Segment Information - Statement of earnings by segment (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2016		Mar. 31, 2015
Segment Reporting Information [Line Items]
Gross premiums written		$ 4,428,226		$ 2,555,360
Net premiums written		3,064,759		1,851,249
Net premiums earned		2,354,610		1,334,000
Net losses and loss expenses		1,387,422	[1]	789,214
Acquisition costs		403,267	[1]	153,696
Operating expenses		391,884	[2]	251,883
Underwriting profit (loss)		172,037		139,207
Net results from structured products		1,970	[3]	5,025
Net fee income and other		(2,723)	[4]	(6,508)
Loss on sale of life reinsurance subsidiary				0
Net realized gains (losses) on investments		92,750		52,891
Net realized and unrealized gains (losses) on derivative instruments		(3,622)		16,521
Net income (loss) from investment fund affiliates and operating affiliates		8,071		57,997
Gain on sale of operating affiliate		0
Exchange (gains) losses		(33,819)		27,390
Corporate operating expenses		112,510		62,443
Contribution from P&C and Corporate and Other		146,936		139,370
Interest expense		41,613	[5]	41,481
Non-controlling interests		61,143		37,390
Income tax		22,295		24,218
Net income (loss) attributable to ordinary shareholders		21,885		36,281
Corporate and Other
Segment Reporting Information [Line Items]
Gross premiums written		68,911	[6]	74,951
Net premiums written		3,164	[6]	14,506
Net premiums earned		3,164	[6]	14,506
Net losses and loss expenses		4,937	[1],[6]	19,387
Acquisition costs		1,461	[1],[6]	1,817
Operating expenses		218	[2],[6]	931
Underwriting profit (loss)		(3,452)	[6]	(7,629)
Net results from structured products		0	[3],[6]	0
Net fee income and other		302	[4],[6]	132
Loss on sale of life reinsurance subsidiary				0
Net realized and unrealized gains (losses) on derivative instruments		(3,622)	[6]	16,521
Net income (loss) from investment fund affiliates and operating affiliates		8,071	[6]	57,997
Gain on sale of operating affiliate	[6]	0
Exchange (gains) losses		(33,819)	[6]	27,390
Corporate operating expenses		112,510	[6]	62,443
Contribution from P&C and Corporate and Other		(159,469)	[6]	(144,466)
Interest expense		41,613	[5],[6]	41,481
Non-controlling interests		61,143	[6]	37,390
Income tax		22,295	[6]	24,218
Excluding Life Funds Withheld Assets
Segment Reporting Information [Line Items]
Net investment income		151,664	[7]	143,018
Net realized gains (losses) on investments		(8,416)		4,602
Excluding Life Funds Withheld Assets | Corporate and Other
Segment Reporting Information [Line Items]
Net investment income		8,533	[6],[7]	10,210
Net realized gains (losses) on investments		2,744	[6]	(1,205)
Life Funds Withheld Assets
Segment Reporting Information [Line Items]
Net investment income		41,560		50,419
Net realized gains (losses) on investments		101,166		48,289
Net realized and unrealized gains (losses) on derivative instruments		(236,080)		(229,367)
Life Funds Withheld Assets | Corporate and Other
Segment Reporting Information [Line Items]
Net investment income		41,560	[6]	50,419
Net realized gains (losses) on investments		101,166	[6]	48,289
Net realized and unrealized gains (losses) on derivative instruments		(236,080)	[6]	(229,367)
Life Funds Withheld Assets | Total P&C
Segment Reporting Information [Line Items]
Net realized gains (losses) on investments		0
Operating Segments [Member] | Total P&C
Segment Reporting Information [Line Items]
Gross premiums written		4,359,315		2,480,409
Net premiums written		3,061,595		1,836,743
Net premiums earned		2,351,446		1,319,494
Net losses and loss expenses		1,382,485	[1]	769,827
Acquisition costs		401,806	[1]	151,879
Operating expenses		391,666	[2]	250,952
Underwriting profit (loss)		175,489		146,836
Net results from structured products		1,970	[3]	5,025
Net fee income and other		(3,025)	[4]	(6,640)
Net realized and unrealized gains (losses) on derivative instruments		0
Contribution from P&C and Corporate and Other		$ 306,405		$ 283,836
Ratios - P&C operations
Loss and loss expense ratio		58.80%	[8]	58.30%
Underwriting expense ratio		33.70%	[8]	30.60%
Combined ratio		92.50%	[8]	88.90%
Operating Segments [Member] | Insurance Segment
Segment Reporting Information [Line Items]
Gross premiums written		$ 2,503,972		$ 1,654,747
Net premiums written		1,503,934		1,089,108
Net premiums earned		1,593,874		962,306
Net losses and loss expenses		999,592	[1]	616,947
Acquisition costs		225,458	[1]	80,387
Operating expenses		312,432	[2]	208,457
Underwriting profit (loss)		56,392		56,515
Net results from structured products		1,222	[3]	2,905
Net fee income and other		$ (3,862)	[4]	$ (7,465)
Ratios - P&C operations
Loss and loss expense ratio		62.70%	[8]	64.10%
Underwriting expense ratio		33.80%	[8]	30.00%
Combined ratio		96.50%	[8]	94.10%
Operating Segments [Member] | Reinsurance Segment
Segment Reporting Information [Line Items]
Gross premiums written		$ 1,855,343		$ 825,662
Net premiums written		1,557,661		747,635
Net premiums earned		757,572		357,188
Net losses and loss expenses		382,893	[1]	152,880
Acquisition costs		176,348	[1]	71,492
Operating expenses		79,234	[2]	42,495
Underwriting profit (loss)		119,097		90,321
Net results from structured products		748	[3]	2,120
Net fee income and other		$ 837	[4]	$ 825
Ratios - P&C operations
Loss and loss expense ratio		50.50%	[8]	42.80%
Underwriting expense ratio		33.80%	[8]	31.90%
Combined ratio		84.30%	[8]	74.70%
Operating Segments [Member] | Excluding Life Funds Withheld Assets | Total P&C
Segment Reporting Information [Line Items]
Net investment income		$ 143,131	[7]	$ 132,808
Net realized gains (losses) on investments		$ (11,160)		$ 5,807

[1] The Company has reflected the amortization of certain fair value adjustments recorded in conjunction with the Catlin Acquisition within the respective segments.

[2] Operating expenses of the segments exclude Corporate operating expenses, shown separately.

[3] The net results from P&C structured products include net investment income and interest expense of $12.7 million and $10.7 million, respectively.

[4] Net fee income and other includes operating expenses from the Company's loss prevention consulting services business.

[5] Interest expense excludes interest expense related to structured products recorded in the Insurance and Reinsurance segments.

[6] Corporate and Other includes other items of our revenue and expenditures that are not evaluated at the segment level for reporting purposes, as well as the Company's Run-Off Life Operations.

[7] Net investment income - excluding Life Funds Withheld Assets does not include net investment income related to the net results from structured products.

[8] Ratios are based on net premiums earned from P&C operations.

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Segment Information - Net Premiums Earned by Line of Business (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2016		Mar. 31, 2015
Net premiums earned by line of business:
P&C Operations		$ 2,351,446		$ 1,319,494
Life Operations		3,164		14,506
Total		2,354,610		1,334,000
Corporate and Other
Net premiums earned by line of business:
Life Operations		3,164		14,506
Total		3,164	[1]	14,506
Life insurance product line
Net premiums earned by line of business:
Life Operations		3,164		14,507
Life insurance product line | Corporate and Other
Net premiums earned by line of business:
Life Operations		3,164		14,507
Professional | Total P&C
Net premiums earned by line of business:
P&C Operations		376,109		301,418
Casualty | Total P&C
Net premiums earned by line of business:
P&C Operations		574,951		399,525
Property catastrophe | Total P&C
Net premiums earned by line of business:
P&C Operations		205,301		94,073
Property | Total P&C
Net premiums earned by line of business:
P&C Operations		614,032		303,763
Specialty | Total P&C
Net premiums earned by line of business:
P&C Operations		403,545		189,953
Other | Total P&C
Net premiums earned by line of business:
P&C Operations	[2]	177,508		30,762
Investments Product Line [Member]
Net premiums earned by line of business:
Life Operations		0		(1)
Investments Product Line [Member] | Corporate and Other
Net premiums earned by line of business:
Life Operations		0		(1)
Operating Segments [Member] | Total P&C
Net premiums earned by line of business:
Total		2,351,446		1,319,494
Operating Segments [Member] | Insurance Segment
Net premiums earned by line of business:
P&C Operations		1,593,874		962,306
Total		1,593,874		962,306
Operating Segments [Member] | Reinsurance Segment
Net premiums earned by line of business:
P&C Operations		757,572		357,188
Total		757,572		357,188
Operating Segments [Member] | Professional | Insurance Segment
Net premiums earned by line of business:
P&C Operations		332,954		266,410
Operating Segments [Member] | Professional | Reinsurance Segment
Net premiums earned by line of business:
P&C Operations		43,155		35,008
Operating Segments [Member] | Casualty | Insurance Segment
Net premiums earned by line of business:
P&C Operations		420,212		341,317
Operating Segments [Member] | Casualty | Reinsurance Segment
Net premiums earned by line of business:
P&C Operations		154,739		58,208
Operating Segments [Member] | Property catastrophe | Insurance Segment
Net premiums earned by line of business:
P&C Operations		0		0
Operating Segments [Member] | Property catastrophe | Reinsurance Segment
Net premiums earned by line of business:
P&C Operations		205,301		94,073
Operating Segments [Member] | Property | Insurance Segment
Net premiums earned by line of business:
P&C Operations		359,633		172,539
Operating Segments [Member] | Property | Reinsurance Segment
Net premiums earned by line of business:
P&C Operations		254,399		131,224
Operating Segments [Member] | Specialty | Insurance Segment
Net premiums earned by line of business:
P&C Operations		367,352		171,878
Operating Segments [Member] | Specialty | Reinsurance Segment
Net premiums earned by line of business:
P&C Operations		36,193		18,075
Operating Segments [Member] | Other | Insurance Segment
Net premiums earned by line of business:
P&C Operations	[2]	113,723		10,162
Operating Segments [Member] | Other | Reinsurance Segment
Net premiums earned by line of business:
P&C Operations	[2]	$ 63,785		$ 20,600

[1] Corporate and Other includes other items of our revenue and expenditures that are not evaluated at the segment level for reporting purposes, as well as the Company's Run-Off Life Operations.

[2] Other within the Insurance segment includes: excess and surplus, programs, surety, structured indemnity and certain discontinued lines. Other within the Reinsurance segment includes: whole account contracts, structured indemnity and other lines.

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Segment Information - Narrative (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2016 USD ($) segments		Mar. 31, 2015 USD ($)
Segment Reporting Information [Line Items]
Number of segments | segments	2
Net results from structured products	$ 1,970	[1]	$ 5,025
Net investment income | Total P&C
Segment Reporting Information [Line Items]
Net results from structured products	12,700		15,100
Interest Expense [Member] | Total P&C
Segment Reporting Information [Line Items]
Net results from structured products	$ (10,700)		$ (10,000)

[1] The net results from P&C structured products include net investment income and interest expense of $12.7 million and $10.7 million, respectively.

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Investments - Cost (amortized cost for fixed maturities and short-term investments), fair value, gross unrealized gains, gross unrealized (losses), and OTTI recorded in AOCI (Details) - USD ($) $ in Thousands		Mar. 31, 2016	Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Amortized cost of fixed maturities		$ 31,444,747	$ 31,517,654
Fixed maturities, at fair value		32,647,573	32,257,589
Non-credit Related OTTI	[1]	(55,423)	(57,734)
Amortized cost of short-term investments, available for sale		317,939	618,851
Short-term investments, at fair value		317,304	617,390
Cost of equity securities		831,543	834,079
Equity securities, at fair value		878,407	878,919
Available-for-sale Securities, Amortized Cost Basis		32,594,229	32,970,584
Available for sale securities, Gross unrealized gains		1,488,746	1,153,289
Available for sale securities, Gross unrealized losses		(239,691)	(369,975)
Total investments available for sale		33,843,284	33,753,898
Excluding Life Funds Withheld Assets
Schedule of Available-for-sale Securities [Line Items]
Amortized cost of fixed maturities		29,016,396	28,839,622
Gross unrealized gains on Fixed maturities		859,790	587,258
Gross unrealized losses on Fixed maturities		(191,970)	(322,394)
Fixed maturities, at fair value		29,684,216	29,104,486
Non-credit Related OTTI	[1]	(55,423)	(57,734)
Amortized cost of short-term investments, available for sale		317,939	618,851
Short term investments, gross unrealized gains		433	967
Short term investments, gross unrealized losses		(1,068)	(2,428)
Short-term investments, at fair value		317,304	617,390
Cost of equity securities		831,543	834,079
Equity securities, gross unrealized gains		93,517	89,993
Equity securities, gross unrealized losses		(46,653)	(45,153)
Equity securities, at fair value		878,407	878,919
Available-for-sale Securities, Amortized Cost Basis		30,165,878	30,292,552
Available for sale securities, Gross unrealized gains		953,740	678,218
Available for sale securities, Gross unrealized losses		(239,691)	(369,975)
Total investments available for sale		30,879,927	30,600,795
Excluding Life Funds Withheld Assets | U.S. Government and Government - Related/Supported
Schedule of Available-for-sale Securities [Line Items]
Amortized cost of fixed maturities		4,483,796	5,047,621
Gross unrealized gains on Fixed maturities		101,066	52,355
Gross unrealized losses on Fixed maturities		(7,875)	(34,339)
Fixed maturities, at fair value		4,576,987	5,065,637
Non-credit Related OTTI	[1]	0	0
Excluding Life Funds Withheld Assets | RMBS - Agency
Schedule of Available-for-sale Securities [Line Items]
Amortized cost of fixed maturities		4,259,838	3,697,756
Gross unrealized gains on Fixed maturities		112,260	77,776
Gross unrealized losses on Fixed maturities		(5,091)	(17,561)
Fixed maturities, at fair value		4,367,007	3,757,971
Non-credit Related OTTI	[1]	0	0
Excluding Life Funds Withheld Assets | RMBS - Non-Agency
Schedule of Available-for-sale Securities [Line Items]
Amortized cost of fixed maturities		303,377	319,876
Gross unrealized gains on Fixed maturities		20,313	25,644
Gross unrealized losses on Fixed maturities		(20,847)	(16,980)
Fixed maturities, at fair value		302,843	328,540
Non-credit Related OTTI	[1]	(52,025)	(54,200)
Excluding Life Funds Withheld Assets | Commercial mortgage-backed securities
Schedule of Available-for-sale Securities [Line Items]
Amortized cost of fixed maturities		317,886	401,713
Gross unrealized gains on Fixed maturities		10,324	7,933
Gross unrealized losses on Fixed maturities		(2,725)	(4,330)
Fixed maturities, at fair value		325,485	405,316
Non-credit Related OTTI	[1]	(1,163)	(1,182)
Excluding Life Funds Withheld Assets | Collateralized debt obligations
Schedule of Available-for-sale Securities [Line Items]
Amortized cost of fixed maturities		25,845	41,679
Gross unrealized gains on Fixed maturities		2	4
Gross unrealized losses on Fixed maturities		(4,118)	(9,273)
Fixed maturities, at fair value		21,729	32,410
Non-credit Related OTTI	[1]	(1,208)	(1,208)
Excluding Life Funds Withheld Assets | Other asset-backed securities
Schedule of Available-for-sale Securities [Line Items]
Amortized cost of fixed maturities		1,154,679	1,164,426
Gross unrealized gains on Fixed maturities		19,123	17,665
Gross unrealized losses on Fixed maturities		(10,904)	(13,519)
Fixed maturities, at fair value		1,162,898	1,168,572
Non-credit Related OTTI	[1]	(1,027)	(1,144)
Excluding Life Funds Withheld Assets | US States and political subdivisions of the States
Schedule of Available-for-sale Securities [Line Items]
Amortized cost of fixed maturities		2,436,400	2,514,048
Gross unrealized gains on Fixed maturities		149,140	125,395
Gross unrealized losses on Fixed maturities		(793)	(7,373)
Fixed maturities, at fair value		2,584,747	2,632,070
Non-credit Related OTTI	[1]	0	0
Excluding Life Funds Withheld Assets | Non-U.S. Sovereign Government, Provincial, Supranational, and Government-Related/Supported
Schedule of Available-for-sale Securities [Line Items]
Amortized cost of fixed maturities		5,442,418	5,249,148
Gross unrealized gains on Fixed maturities		161,392	100,383
Gross unrealized losses on Fixed maturities		(57,115)	(97,917)
Fixed maturities, at fair value		5,546,695	5,251,614
Non-credit Related OTTI	[1]	0	0
Life Funds Withheld Assets
Schedule of Available-for-sale Securities [Line Items]
Amortized cost of fixed maturities		2,428,351	2,678,032
Gross unrealized gains on Fixed maturities		535,006	475,071
Gross unrealized losses on Fixed maturities		0	0
Fixed maturities, at fair value		2,963,357	3,153,103
Non-credit Related OTTI	[1]	0	0
Life Funds Withheld Assets | U.S. Government and Government - Related/Supported
Schedule of Available-for-sale Securities [Line Items]
Amortized cost of fixed maturities		10,315	10,721
Gross unrealized gains on Fixed maturities		2,377	2,021
Gross unrealized losses on Fixed maturities		0	0
Fixed maturities, at fair value		12,692	12,742
Non-credit Related OTTI	[1]	0	0
Life Funds Withheld Assets | RMBS - Agency
Schedule of Available-for-sale Securities [Line Items]
Amortized cost of fixed maturities		597	591
Gross unrealized gains on Fixed maturities		136	161
Gross unrealized losses on Fixed maturities		0	0
Fixed maturities, at fair value		733	752
Non-credit Related OTTI	[1]	0	0
Life Funds Withheld Assets | RMBS - Non-Agency
Schedule of Available-for-sale Securities [Line Items]
Amortized cost of fixed maturities		23,172	24,401
Gross unrealized gains on Fixed maturities		2,657	2,552
Gross unrealized losses on Fixed maturities		0	0
Fixed maturities, at fair value		25,829	26,953
Non-credit Related OTTI	[1]	0	0
Life Funds Withheld Assets | Commercial mortgage-backed securities
Schedule of Available-for-sale Securities [Line Items]
Amortized cost of fixed maturities		92,586	107,968
Gross unrealized gains on Fixed maturities		16,328	14,513
Gross unrealized losses on Fixed maturities		0	0
Fixed maturities, at fair value		108,914	122,481
Non-credit Related OTTI	[1]	0	0
Life Funds Withheld Assets | Other asset-backed securities
Schedule of Available-for-sale Securities [Line Items]
Amortized cost of fixed maturities		105,635	132,674
Gross unrealized gains on Fixed maturities		16,086	17,121
Gross unrealized losses on Fixed maturities		0	0
Fixed maturities, at fair value		121,721	149,795
Non-credit Related OTTI	[1]	0	0
Life Funds Withheld Assets | Non-U.S. Sovereign Government, Provincial, Supranational, and Government-Related/Supported
Schedule of Available-for-sale Securities [Line Items]
Amortized cost of fixed maturities		650,259	737,735
Gross unrealized gains on Fixed maturities		226,668	195,781
Gross unrealized losses on Fixed maturities		0	0
Fixed maturities, at fair value		876,927	933,516
Non-credit Related OTTI	[1]	0	0
Financial Services Sector | Excluding Life Funds Withheld Assets | Corporate
Schedule of Available-for-sale Securities [Line Items]
Amortized cost of fixed maturities		3,656,521	3,535,830
Gross unrealized gains on Fixed maturities		75,341	49,535
Gross unrealized losses on Fixed maturities		(27,547)	(23,456)
Fixed maturities, at fair value		3,704,315	3,561,909
Non-credit Related OTTI	[1]	0	0
Financial Services Sector | Life Funds Withheld Assets | Corporate
Schedule of Available-for-sale Securities [Line Items]
Amortized cost of fixed maturities		486,901	531,016
Gross unrealized gains on Fixed maturities		60,378	67,220
Gross unrealized losses on Fixed maturities		0	0
Fixed maturities, at fair value		547,279	598,236
Non-credit Related OTTI	[1]	0	0
Non-Financial Services Sector | Excluding Life Funds Withheld Assets | Corporate
Schedule of Available-for-sale Securities [Line Items]
Amortized cost of fixed maturities		6,935,636	6,867,525
Gross unrealized gains on Fixed maturities		210,829	130,568
Gross unrealized losses on Fixed maturities		(54,955)	(97,646)
Fixed maturities, at fair value		7,091,510	6,900,447
Non-credit Related OTTI	[1]	0	0
Non-Financial Services Sector | Life Funds Withheld Assets | Corporate
Schedule of Available-for-sale Securities [Line Items]
Amortized cost of fixed maturities		1,058,886	1,132,926
Gross unrealized gains on Fixed maturities		210,376	175,702
Gross unrealized losses on Fixed maturities		0	0
Fixed maturities, at fair value		1,269,262	1,308,628
Non-credit Related OTTI	[1]	$ 0	$ 0

[1] Represents the non-credit component of OTTI losses, adjusted for subsequent sales of securities. It does not include the change in fair value subsequent to the impairment measurement date.

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Investments - Amortized cost and fair value of trading securities (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized cost of fixed maturities, trading	$ 1,367,908	$ 1,263,609
Fixed maturities, trading at fair value	1,409,583	1,235,699
Amortized cost of short-term investments, trading	26,949	60,176
Short-term investments, trading at fair value	26,959	60,330
Total investments, trading	1,436,542	1,296,029
Life Funds Withheld Assets
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized cost of fixed maturities, trading	1,367,908	1,263,609
Fixed maturities, trading at fair value	1,409,583	1,235,699
Amortized cost of short-term investments, trading	26,949	60,176
Short-term investments, trading at fair value	26,959	60,330
Trading securities, cost	1,394,857	1,323,785
Total investments, trading	1,436,542	1,296,029
Life Funds Withheld Assets | U.S. Government and Government - Related/Supported
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized cost of fixed maturities, trading	15,567	4,957
Fixed maturities, trading at fair value	15,267	4,990
Life Funds Withheld Assets | RMBS - Agency
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized cost of fixed maturities, trading	1,917	370
Fixed maturities, trading at fair value	1,869	368
Life Funds Withheld Assets | Commercial mortgage-backed securities
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized cost of fixed maturities, trading	4,675	4,874
Fixed maturities, trading at fair value	4,760	4,803
Life Funds Withheld Assets | Other asset-backed securities
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized cost of fixed maturities, trading	25,457	26,405
Fixed maturities, trading at fair value	25,615	25,700
Life Funds Withheld Assets | Non-U.S. Sovereign Government, Provincial, Supranational, and Government-Related/Supported
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized cost of fixed maturities, trading	390,986	373,492
Fixed maturities, trading at fair value	421,033	370,261
Financial Services Sector | Life Funds Withheld Assets | Corporate
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized cost of fixed maturities, trading	379,848	344,070
Fixed maturities, trading at fair value	382,755	335,956
Non-Financial Services Sector | Life Funds Withheld Assets | Corporate
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized cost of fixed maturities, trading	549,458	509,441
Fixed maturities, trading at fair value	$ 558,284	$ 493,621

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Investments - Contractual maturities of available for sale securities (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Fixed Maturities - AFS
Amortized cost of fixed maturities	$ 31,444,747	$ 31,517,654
Fixed maturities, at fair value	32,647,573	32,257,589
Amortized cost of fixed maturities, trading	1,367,908	1,263,609
Fixed maturities, trading at fair value	1,409,583	1,235,699
Excluding Life Funds Withheld Assets
Fixed Maturities - AFS
Due less than one year, amortized cost	2,156,182	2,106,851
Due less than one year, fair value	2,151,862	2,104,106
Due after 1 through 5 years, amortized cost	13,787,996	14,051,494
Due after 1 through 5 years, fair value	14,020,514	14,143,461
Due after 5 through 10 years, amortized cost	5,622,857	5,680,830
Due after 5 through 10 years, fair value	5,828,464	5,740,954
Due after 10 years, amortized cost	1,387,736	1,374,997
Due after 10 years, fair value	1,503,414	1,423,156
Subtotal - amortized cost	22,954,771	23,214,172
Subtotal - fair value	23,504,254	23,411,677
Mortgage and asset backed securities - amortized cost	6,061,625	5,625,450
Mortgage and asset backed securities - fair value	6,179,962	5,692,809
Amortized cost of fixed maturities	29,016,396	28,839,622
Fixed maturities, at fair value	29,684,216	29,104,486
Excluding Life Funds Withheld Assets | RMBS - Agency
Fixed Maturities - AFS
Mortgage and asset backed securities - amortized cost	4,259,838	3,697,756
Mortgage and asset backed securities - fair value	4,367,007	3,757,971
Amortized cost of fixed maturities	4,259,838	3,697,756
Fixed maturities, at fair value	4,367,007	3,757,971
Excluding Life Funds Withheld Assets | RMBS - Non-Agency
Fixed Maturities - AFS
Mortgage and asset backed securities - amortized cost	303,377	319,876
Mortgage and asset backed securities - fair value	302,843	328,540
Amortized cost of fixed maturities	303,377	319,876
Fixed maturities, at fair value	302,843	328,540
Excluding Life Funds Withheld Assets | Commercial mortgage-backed securities
Fixed Maturities - AFS
Mortgage and asset backed securities - amortized cost	317,886	401,713
Mortgage and asset backed securities - fair value	325,485	405,316
Amortized cost of fixed maturities	317,886	401,713
Fixed maturities, at fair value	325,485	405,316
Excluding Life Funds Withheld Assets | Collateralized debt obligations
Fixed Maturities - AFS
Mortgage and asset backed securities - amortized cost	25,845	41,679
Mortgage and asset backed securities - fair value	21,729	32,410
Amortized cost of fixed maturities	25,845	41,679
Fixed maturities, at fair value	21,729	32,410
Excluding Life Funds Withheld Assets | Other asset-backed securities
Fixed Maturities - AFS
Mortgage and asset backed securities - amortized cost	1,154,679	1,164,426
Mortgage and asset backed securities - fair value	1,162,898	1,168,572
Amortized cost of fixed maturities	1,154,679	1,164,426
Fixed maturities, at fair value	1,162,898	1,168,572
Life Funds Withheld Assets
Fixed Maturities - AFS
Due less than one year, amortized cost	78,629	81,700
Due less than one year, fair value	88,560	92,921
Due after 1 through 5 years, amortized cost	361,106	386,810
Due after 1 through 5 years, fair value	391,528	416,743
Due after 5 through 10 years, amortized cost	470,386	491,621
Due after 5 through 10 years, fair value	547,171	558,805
Due after 10 years, amortized cost	1,296,240	1,452,267
Due after 10 years, fair value	1,678,901	1,784,653
Subtotal - amortized cost	2,206,361	2,412,398
Subtotal - fair value	2,706,160	2,853,122
Mortgage and asset backed securities - amortized cost	221,990	265,634
Mortgage and asset backed securities - fair value	257,197	299,981
Amortized cost of fixed maturities	2,428,351	2,678,032
Fixed maturities, at fair value	2,963,357	3,153,103
Amortized cost of fixed maturities, trading	1,367,908	1,263,609
Fixed maturities, trading at fair value	1,409,583	1,235,699
Life Funds Withheld Assets | RMBS - Agency
Fixed Maturities - AFS
Mortgage and asset backed securities - amortized cost	597	591
Mortgage and asset backed securities - fair value	733	752
Amortized cost of fixed maturities	597	591
Fixed maturities, at fair value	733	752
Amortized cost of fixed maturities, trading	1,917	370
Fixed maturities, trading at fair value	1,869	368
Life Funds Withheld Assets | RMBS - Non-Agency
Fixed Maturities - AFS
Mortgage and asset backed securities - amortized cost	23,172	24,401
Mortgage and asset backed securities - fair value	25,829	26,953
Amortized cost of fixed maturities	23,172	24,401
Fixed maturities, at fair value	25,829	26,953
Life Funds Withheld Assets | Commercial mortgage-backed securities
Fixed Maturities - AFS
Mortgage and asset backed securities - amortized cost	92,586	107,968
Mortgage and asset backed securities - fair value	108,914	122,481
Amortized cost of fixed maturities	92,586	107,968
Fixed maturities, at fair value	108,914	122,481
Amortized cost of fixed maturities, trading	4,675	4,874
Fixed maturities, trading at fair value	4,760	4,803
Life Funds Withheld Assets | Other asset-backed securities
Fixed Maturities - AFS
Mortgage and asset backed securities - amortized cost	105,635	132,674
Mortgage and asset backed securities - fair value	121,721	149,795
Amortized cost of fixed maturities	105,635	132,674
Fixed maturities, at fair value	121,721	149,795
Amortized cost of fixed maturities, trading	25,457	26,405
Fixed maturities, trading at fair value	25,615	25,700
Life Funds Withheld Assets | Cost
Fixed Maturities - AFS
Due less than one year	8,177	4,573
Due after 1 through 5 years	290,320	278,163
Due after 5 through 10 years	314,590	280,487
Due after 10 years	722,772	668,737
Subtotal	1,335,859	1,231,960
Mortgage and asset-backed securities	32,049	31,649
Amortized cost of fixed maturities, trading	1,367,908	1,263,609
Life Funds Withheld Assets | Cost | RMBS - Agency
Fixed Maturities - AFS
Mortgage and asset-backed securities	1,917	370
Life Funds Withheld Assets | Cost | Commercial mortgage-backed securities
Fixed Maturities - AFS
Mortgage and asset-backed securities	4,675	4,874
Life Funds Withheld Assets | Cost | Other asset-backed securities
Fixed Maturities - AFS
Mortgage and asset-backed securities	25,457	26,405
Life Funds Withheld Assets | Fair value
Fixed Maturities - AFS
Due less than one year	8,831	5,096
Due after 1 through 5 years	291,356	272,220
Due after 5 through 10 years	320,720	277,920
Due after 10 years	756,432	649,592
Subtotal	1,377,339	1,204,828
Mortgage and asset-backed securities	32,244	30,871
Fixed maturities, trading at fair value	1,409,583	1,235,699
Life Funds Withheld Assets | Fair value | RMBS - Agency
Fixed Maturities - AFS
Mortgage and asset-backed securities	1,869	368
Life Funds Withheld Assets | Fair value | Commercial mortgage-backed securities
Fixed Maturities - AFS
Mortgage and asset-backed securities	4,760	4,803
Life Funds Withheld Assets | Fair value | Other asset-backed securities
Fixed Maturities - AFS
Mortgage and asset-backed securities	$ 25,615	$ 25,700

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Investments - Analysis of continual unrealized loss position (Details) - Excluding Life Funds Withheld Assets - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Total fixed maturities and short-term investments AFS
Fixed maturities and short-term investments - AFS:
Less than 12 months Fair Value	$ 3,555,794	$ 12,953,757
Less than 12 months Gross Unrealized Losses	(81,512)	(194,216)
Equal to or greater than 12 months Fair Value	1,540,883	1,463,517
Equal to greater than 12 months Gross Unrealized Losses	(111,526)	(130,606)
U.S. Government and Government - Related/Supported
Fixed maturities and short-term investments - AFS:
Less than 12 months Fair Value	465,423	3,762,869
Less than 12 months Gross Unrealized Losses	(4,923)	(29,339)
Equal to or greater than 12 months Fair Value	96,406	89,113
Equal to greater than 12 months Gross Unrealized Losses	(2,984)	(5,044)
RMBS - Agency
Fixed maturities and short-term investments - AFS:
Less than 12 months Fair Value	151,135	1,065,055
Less than 12 months Gross Unrealized Losses	(1,128)	(10,046)
Equal to or greater than 12 months Fair Value	327,657	221,211
Equal to greater than 12 months Gross Unrealized Losses	(3,963)	(7,515)
RMBS - Non-Agency
Fixed maturities and short-term investments - AFS:
Less than 12 months Fair Value	35,930	19,614
Less than 12 months Gross Unrealized Losses	(1,867)	(1,104)
Equal to or greater than 12 months Fair Value	175,881	180,146
Equal to greater than 12 months Gross Unrealized Losses	(18,980)	(15,876)
Commercial mortgage-backed securities
Fixed maturities and short-term investments - AFS:
Less than 12 months Fair Value	31,661	118,605
Less than 12 months Gross Unrealized Losses	(255)	(1,561)
Equal to or greater than 12 months Fair Value	55,310	78,651
Equal to greater than 12 months Gross Unrealized Losses	(2,470)	(2,769)
Collateralized debt obligations
Fixed maturities and short-term investments - AFS:
Less than 12 months Fair Value	12,368	12,311
Less than 12 months Gross Unrealized Losses	(509)	(516)
Equal to or greater than 12 months Fair Value	9,359	20,096
Equal to greater than 12 months Gross Unrealized Losses	(3,609)	(8,757)
Other asset-backed securities
Fixed maturities and short-term investments - AFS:
Less than 12 months Fair Value	282,395	572,671
Less than 12 months Gross Unrealized Losses	(2,113)	(5,252)
Equal to or greater than 12 months Fair Value	60,638	57,563
Equal to greater than 12 months Gross Unrealized Losses	(8,791)	(8,268)
US States and political subdivisions of the States
Fixed maturities and short-term investments - AFS:
Less than 12 months Fair Value	91,846	565,055
Less than 12 months Gross Unrealized Losses	(379)	(6,609)
Equal to or greater than 12 months Fair Value	15,528	12,259
Equal to greater than 12 months Gross Unrealized Losses	(414)	(765)
Non-U.S. Sovereign Government, Provincial, Supranational, and Government-Related/Supported
Fixed maturities and short-term investments - AFS:
Less than 12 months Fair Value	965,976	1,921,286
Less than 12 months Gross Unrealized Losses	(22,116)	(53,440)
Equal to or greater than 12 months Fair Value	370,747	474,929
Equal to greater than 12 months Gross Unrealized Losses	(35,912)	(46,714)
Equities
Fixed maturities and short-term investments - AFS:
Less than 12 months Fair Value	365,368	356,742
Less than 12 months Gross Unrealized Losses	(46,653)	(45,153)
Equal to or greater than 12 months Fair Value	0	0
Equal to greater than 12 months Gross Unrealized Losses	0	0
Financial Services Sector | Corporate
Fixed maturities and short-term investments - AFS:
Less than 12 months Fair Value	588,595	1,641,021
Less than 12 months Gross Unrealized Losses	(18,228)	(13,280)
Equal to or greater than 12 months Fair Value	141,508	102,022
Equal to greater than 12 months Gross Unrealized Losses	(9,330)	(10,192)
Non-Financial Services Sector | Corporate
Fixed maturities and short-term investments - AFS:
Less than 12 months Fair Value	930,465	3,275,270
Less than 12 months Gross Unrealized Losses	(29,994)	(73,069)
Equal to or greater than 12 months Fair Value	287,849	227,527
Equal to greater than 12 months Gross Unrealized Losses	$ (25,073)	$ (24,706)

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Investments - Analysis of net realized gains (losses) and the change in unrealized (losses) gains on investments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Net realized gains (losses): [Abstract]
Net realized gains (losses) on investments	$ 92,750	$ 52,891
Excluding Life Funds Withheld Assets
Net realized gains (losses): [Abstract]
Gross realized gains	61,227	62,300
Gross realized losses on investments sold	(50,063)	(47,122)
OTTI on investments, net of amounts transferred to other comprehensive income	(19,580)	(10,576)
Net realized gains (losses) on investments	(8,416)	4,602
Life Funds Withheld Assets
Net realized gains (losses): [Abstract]
Gross realized gains	62,850	53,128
Gross realized losses on investments sold	(28,434)	(390)
OTTI on investments, net of amounts transferred to other comprehensive income	(2,346)	(5,209)
Net unrealized gains (losses) on investments, trading securities	69,096	760
Net realized gains (losses) on investments	$ 101,166	$ 48,289

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Investments - Credit loss impairments on fixed income securities (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Investments, Debt and Equity Securities [Abstract]
Balance, beginning of period	$ 73,469	$ 131,942
Credit loss impairment recognized in the current period on securities not previously impaired	10,567	7,560
Credit loss impairments previously recognized on securities which matured, paid down, prepaid or were sold during the period	(4,877)	(28,539)
Additional credit loss impairments recognized in the current period on securities previously impaired	230	141
Accretion of credit loss impairments previously recognized due to an increase in cash flows expected to be collected	(2,410)	(2,646)
Balance, end of period	$ 76,979	$ 108,458

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Investments - Narrative (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2016 USD ($) positions	Mar. 31, 2015 USD ($)	Dec. 31, 2015 USD ($)
Schedule of Available-for-sale Securities [Line Items]
Percentage of Fixed Income Investment portfolio invested in below investment grade or not rated	2.10%		2.00%
Percentage of Gross Unrealized losses in Fixed income securities portfolio related to securities below investment grade or not rated	18.30%		14.70%
Pledged Assets Separately Reported, Other Debt Securities Available-for-sale or Held-for-investment	$ 19,000,000		$ 18,300,000
Available for sale securities, Gross unrealized losses	$ 239,691		369,975
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | positions	1,934
Available-for-sale Securities, Qualitative Disclosure, Number of Positions | positions	8,763
Change in adjustments related to future policy benefit reserves, net of tax	$ 17,035	$ 60,356
Fixed maturities, at fair value	32,647,573		32,257,589
Amortized cost of fixed maturities	31,444,747		31,517,654
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Reductions, Securities Sold	4,877	28,539
Unrealized gains (losses) on investments
Schedule of Available-for-sale Securities [Line Items]
Change in adjustments related to future policy benefit reserves, net of tax	17,000
Excluding Life Funds Withheld Assets
Schedule of Available-for-sale Securities [Line Items]
Available for sale securities, Gross unrealized losses	239,691		369,975
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net, Available-for-sale Securities	19,580	$ 10,576
Fixed maturities, at fair value	29,684,216		29,104,486
Amortized cost of fixed maturities	29,016,396		28,839,622
Excluding Life Funds Withheld Assets | Corporate
Schedule of Available-for-sale Securities [Line Items]
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net, Available-for-sale Securities	9,800
Excluding Life Funds Withheld Assets | Equities
Schedule of Available-for-sale Securities [Line Items]
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net, Available-for-sale Securities	7,000
Excluding Life Funds Withheld Assets | Collateralized debt obligations
Schedule of Available-for-sale Securities [Line Items]
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net, Available-for-sale Securities	600
Fixed maturities, at fair value	21,729		32,410
Amortized cost of fixed maturities	25,845		$ 41,679
Excluding Life Funds Withheld Assets | Municipal Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net, Available-for-sale Securities	300
Excluding Life Funds Withheld Assets | Foreign Exchange [Member]
Schedule of Available-for-sale Securities [Line Items]
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net, Available-for-sale Securities	$ 1,900

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Derivative Instruments - Gross amounts of derivative fair values contained in the consolidated balance sheet (Details) - USD ($) $ in Thousands		Mar. 31, 2016	Dec. 31, 2015
Derivatives, Fair Value [Line Items]
Gross amounts recognized in balance sheet	[1]	$ 76,604	$ 89,314
Gross amounts recognized in balance sheet	[1]	88,688	45,495
Collateral and counterparty netting, assets	[1],[2]	(37,870)	(3,087)
Collateral and counterparty nettings, liabilities	[1],[2]	(37,870)	(3,087)
Asset derivative fair value	[1],[3]	38,734	86,227
Liability derivative fair value	[1],[3]	50,818	42,408
Gross amounts not offset in the balance sheet - cash collateral	[1]	(5,520)	(30,958)
Derivative, Collateral, Right to Reclaim Cash	[1]	(4,230)	0
Derivative Asset	[1]	33,214	55,269
Derivative Liability	[1]	46,588	42,408
Derivatives designated as hedging instruments
Derivatives, Fair Value [Line Items]
Asset derivative notional amount		1,216,823	1,667,585
Gross amounts recognized in balance sheet	[1]	50,707	64,289
Liability derivative notional amount		1,001,752	674,976
Gross amounts recognized in balance sheet	[1]	54,387	11,941
Derivatives designated as hedging instruments | Foreign exchange contracts
Derivatives, Fair Value [Line Items]
Asset derivative notional amount		1,216,823	1,667,585
Gross amounts recognized in balance sheet	[1]	50,707	64,289
Liability derivative notional amount		1,001,752	674,976
Gross amounts recognized in balance sheet	[1]	54,387	11,941
Derivatives not designated as hedging instruments
Derivatives, Fair Value [Line Items]
Asset derivative notional amount		500,693	441,843
Gross amounts recognized in balance sheet	[1]	25,897	25,025
Liability derivative notional amount		4,782,138	4,909,732
Gross amounts recognized in balance sheet	[1]	34,301	33,554
Derivatives not designated as hedging instruments | Investment related derivatives | Foreign exchange contracts
Derivatives, Fair Value [Line Items]
Asset derivative notional amount		199,007	102,234
Gross amounts recognized in balance sheet	[1]	2,501	2,888
Liability derivative notional amount		46,628	144,707
Gross amounts recognized in balance sheet	[1]	534	1,702
Derivatives not designated as hedging instruments | Investment related derivatives | Credit exposure
Derivatives, Fair Value [Line Items]
Asset derivative notional amount		5,000	8,433
Gross amounts recognized in balance sheet	[1]	414	652
Liability derivative notional amount		70,682	71,614
Gross amounts recognized in balance sheet	[1]	11,869	12,067
Derivatives not designated as hedging instruments | Investment related derivatives | Financial market exposure
Derivatives, Fair Value [Line Items]
Asset derivative notional amount		5	37
Gross amounts recognized in balance sheet	[1]	4	77
Liability derivative notional amount		28,480	26,500
Gross amounts recognized in balance sheet	[1]	1,384	417
Derivatives not designated as hedging instruments | Other non-investment derivatives | Foreign exchange contracts
Derivatives, Fair Value [Line Items]
Asset derivative notional amount		188,400	194,566
Gross amounts recognized in balance sheet	[1]	2,492	2,009
Liability derivative notional amount		0	0
Gross amounts recognized in balance sheet	[1]	0	0
Derivatives not designated as hedging instruments | Other non-investment derivatives | Other credit derivatives
Derivatives, Fair Value [Line Items]
Asset derivative notional amount		0	29,874
Gross amounts recognized in balance sheet	[1]	0	31
Liability derivative notional amount		30,090	0
Gross amounts recognized in balance sheet	[1]	28	0
Derivatives not designated as hedging instruments | Other non-investment derivatives | Guaranteed minimum income benefit contract
Derivatives, Fair Value [Line Items]
Asset derivative notional amount		49,562	46,032
Gross amounts recognized in balance sheet	[1]	20,486	19,368
Liability derivative notional amount		49,562	46,032
Gross amounts recognized in balance sheet	[1]	20,486	19,368
Derivatives not designated as hedging instruments | Other non-investment derivatives | Modified coinsurance funds withheld contract
Derivatives, Fair Value [Line Items]
Asset derivative notional amount	[4]	58,719	60,667
Gross amounts recognized in balance sheet	[1],[4]	0	0
Liability derivative notional amount	[4]	4,556,696	4,620,879
Gross amounts recognized in balance sheet	[1],[4]	$ 0	$ 0

[1] Derivative instruments in an asset or liability position are included within Other assets or Other liabilities, respectively, in the balance sheets on a net basis where the Company has both a legal right of offset and the intention to settle the contracts on a net basis. The Company often enters into different types of derivative contracts with a single counterparty and these contracts are covered under netting agreements.

[2] Other assets and other liabilities include derivative instruments. The derivative balances included in each category are reported on a gross basis by level with a netting adjustment presented separately in the Collateral and Counterparty Netting column. The fair values of the individual derivative contracts are reported gross in their respective levels based on the fair value hierarchy. For further details regarding derivative fair values and associated collateral received or paid, see Note 7, "Derivative Instruments.

[3] As of March 31, 2016, the Company held cash collateral related to foreign currency derivative positions and certain other derivative positions of $5.5 million for derivatives in an asset position and paid cash collateral of $4.2 million for derivatives in a liability position. As of December 31, 2015, the Company held cash collateral related to foreign currency derivative position and certain other derivative positions of $31.0 million for derivatives in an asset position and paid cash collateral of nil for derivatives in a liability position. The assets and liabilities related to the net collateral paid or held were recorded as Other assets and Other liabilities within the unaudited consolidated balance sheets as the collateral and derivative positions are not intended to be settled on a net basis.

[4] The fair value movements in derivative assets and liabilities relating to modified coinsurance funds withheld contracts are included within the associated asset or liability at each period end on the face of the balance sheets. Notional amounts associated with reinsurance agreements under which the Company assumes reinsurance risk are recorded as asset derivative notional amounts. Notional amounts associated with the GreyCastle Life Retro Arrangements under which the Company cedes reinsurance risk are recorded as liability derivative notional amounts. Included in the liability derivative notional amount as of March 31, 2016 is the cumulative net realized and unrealized loss on life retrocession embedded derivative of $681.8 million

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Derivative Instruments - Schedule of settlement of fair value hedges (Details) - Fair value hedges - Deposit liabilities - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Derivative [Line Items]
Cumulative reduction to interest expense	$ 106,056	$ 97,705
Remaining balance	$ 127,139	$ 135,490
Weighted average years remaining to maturity	21 years 2 months 12 days	22 years 2 months 12 days

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Derivative Instruments - Derivative instruments designated as hedges of the net investment in a foreign operation - Summary (Details) - Derivatives designated as hedging instruments - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2015
Derivative [Line Items]
Weighted average of U.S. dollar equivalent of foreign denominated net assets		$ 2,234,748	$ 628,941
Derivative gains (losses)	[1]	$ (11,515)	$ 66,770

[1] Derivative gains (losses) from derivative instruments designated as hedges of the net investment in a foreign operation are recorded in the cumulative translation adjustment account within AOCI for each period.

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Derivative Instruments - Net Realized and unrealized gains (losses) on derivative instruments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Derivative [Line Items]
Net realized and unrealized gains (losses) on derivative instruments	$ (3,622)	$ 16,521
Derivatives not designated as hedging instruments | Investment related derivatives
Derivative [Line Items]
Interest rate exposure	781	9,637
Foreign exchange exposure	(670)	(1,362)
Credit exposure	(163)	82
Financial market exposure	(1,010)	3,041
Derivatives not designated as hedging instruments | Other non-investment derivatives
Derivative [Line Items]
Foreign exchange exposure	(1,181)	2,059
Credit exposure	(303)	1,346
Modified coinsurance funds withheld contract	(1,076)	1,718
Life Funds Withheld Assets
Derivative [Line Items]
Net realized and unrealized gains (losses) on derivative instruments	$ (236,080)	$ (229,367)

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Derivative Instruments - Impact of life retro arrangements (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2016		Mar. 31, 2015
Derivative [Line Items]
Underwriting profit (loss)		$ 172,037		$ 139,207
Net investment income		205,886		208,513
Foreign Currency Transaction Gain (Loss), before Tax		33,819		(27,390)
Other income and expenses		(2,723)	[1]	(6,508)
Net realized and unrealized gains (losses) on life retrocession embedded derivative		(3,622)		16,521
Net income (loss)		83,028		73,671
Change in adjustments related to future policy benefit reserves, net of tax		17,035		60,356
Foreign currency translation adjustments, net of tax		(16,439)		36,103
Comprehensive income (loss)		407,941		220,712
Life Funds Withheld Assets
Derivative [Line Items]
Net investment income		41,560		50,419
Net realized gains (losses) on investments sold		34,416		52,738
Net unrealized gains (losses) on investments, trading securities		69,096		760
Other-than-temporary impairments on investments		(2,346)		(5,209)
Net realized and unrealized gains (losses) on life retrocession embedded derivative		(236,080)		(229,367)
Change in net unrealized gains (losses) on investments, net of tax		51,990		37,115
XL Re Life (SAC) Ltd
Derivative [Line Items]
Comprehensive income (loss)		0
XL Re Life (SAC) Ltd | Life Funds Withheld Assets
Derivative [Line Items]
Underwriting profit (loss)	[2]	0		603
Net investment income		41,560		50,419
Net realized gains (losses) on investments sold		34,416		52,738
Net unrealized gains (losses) on investments, trading securities		69,096		760
Other-than-temporary impairments on investments		(2,346)		(5,209)
Foreign Currency Transaction Gain (Loss), before Tax		11,119		3,684
Other income and expenses		(146)		(1,298)
Net realized and unrealized gains (losses) on life retrocession embedded derivative		(236,080)		(229,367)
Net income (loss)		(82,381)		(127,670)
Change in net unrealized gains (losses) on investments, net of tax		51,990		37,115
Change in adjustments related to future policy benefit reserves, net of tax		17,035		60,356
Foreign currency translation adjustments, net of tax		13,356		30,802
Change In Other Comprehensive Income Life Retro Arrangements		82,381		128,273
Comprehensive income (loss)		$ 0		$ 603

[1] Net fee income and other includes operating expenses from the Company's loss prevention consulting services business.

[2] The underwriting profit of $0.6 million relates to a premium adjustment during the three months ended March 31, 2015 relating to the GreyCastle Life Retro Arrangements transaction. Excluding this transaction, the impact to comprehensive income relating to the GreyCastle Life Retro Arrangements was nil for the three months ended March 31, 2015.

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Derivative Instruments - Components of life retrocession embedded derivative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Derivative [Line Items]
Net realized and unrealized gains (losses) on derivative instruments	$ (3,622)	$ 16,521
Life Funds Withheld Assets
Derivative [Line Items]
Net realized and unrealized gains (losses) on life retrocession embedded derivative	(217,896)	(203,730)
Net adjustments related to future policy benefit reserves, net of tax	(22,053)	(11,954)
Net realized and unrealized gains (losses) on derivative instruments - Life Funds Withheld Assets	3,869	(13,683)
Net realized and unrealized gains (losses) on derivative instruments	(236,080)	(229,367)
Life Funds Withheld Assets | Interest income
Derivative [Line Items]
Net realized and unrealized gains (losses) on life retrocession embedded derivative	(43,110)	(50,996)
Life Funds Withheld Assets | Net realized and unrealized gains (losses) on derivative instruments
Derivative [Line Items]
Net realized and unrealized gains (losses) on life retrocession embedded derivative	(174,932)	(152,830)
Life Funds Withheld Assets | Other income
Derivative [Line Items]
Net realized and unrealized gains (losses) on life retrocession embedded derivative	$ 146	$ 96

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Derivative Instruments - Summary of contingent credit features (Details) - USD ($) $ in Thousands		Mar. 31, 2016	Dec. 31, 2015
Derivative [Line Items]
Collateral posted to counterparty	[1]	$ 4,230	$ 0
Contracts with downgrade provisions [Member]
Derivative [Line Items]
Aggregate fair value of derivative agreements with downgrade provisions in a net liability position		19,038	5,827
Collateral posted to counterparty		$ 600	$ 0

[1] Derivative instruments in an asset or liability position are included within Other assets or Other liabilities, respectively, in the balance sheets on a net basis where the Company has both a legal right of offset and the intention to settle the contracts on a net basis. The Company often enters into different types of derivative contracts with a single counterparty and these contracts are covered under netting agreements.

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Derivative Instruments - Narrative (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Derivative [Line Items]
Gross amounts not offset in the balance sheet - cash collateral	[1]	$ 5,520		$ 30,958
Derivative, Collateral, Right to Reclaim Cash	[1]	4,230		0
Derivative liability, Gross amounts recognized in balance sheet	[1]	88,688		45,495
Derivative asset, Gross amounts recognized in balance sheet	[1]	76,604		89,314
Net realized and unrealized gains (losses) on derivative instruments		(3,622)	$ 16,521
Underwriting profit (loss)		172,037	139,207
Comprehensive income (loss)		407,941	220,712
Derivatives not designated as hedging instruments
Derivative [Line Items]
Liability derivative notional amount		4,782,138		4,909,732
Asset derivative notional amount		500,693		441,843
Derivative liability, Gross amounts recognized in balance sheet	[1]	34,301		33,554
Derivative asset, Gross amounts recognized in balance sheet	[1]	25,897		25,025
Other non-investment derivatives | Derivatives not designated as hedging instruments | Other credit derivatives
Derivative [Line Items]
Liability derivative notional amount		30,090		0
Asset derivative notional amount		0		29,874
Derivative liability, Gross amounts recognized in balance sheet	[1]	28		0
Derivative asset, Gross amounts recognized in balance sheet	[1]	0		$ 31
Life Funds Withheld Assets
Derivative [Line Items]
Embedded Derivative, Accumulated Net Gain (Loss) on Embedded Derivative		681,800
Net realized and unrealized gains (losses) on derivative instruments		(236,080)	(229,367)
XL Re Life (SAC) Ltd
Derivative [Line Items]
Comprehensive income (loss)		0
XL Re Life (SAC) Ltd | Life Funds Withheld Assets
Derivative [Line Items]
Net realized and unrealized gains (losses) on derivative instruments		(236,080)	(229,367)
Underwriting profit (loss)	[2]	0	603
Comprehensive income (loss)		$ 0	$ 603

[1] Derivative instruments in an asset or liability position are included within Other assets or Other liabilities, respectively, in the balance sheets on a net basis where the Company has both a legal right of offset and the intention to settle the contracts on a net basis. The Company often enters into different types of derivative contracts with a single counterparty and these contracts are covered under netting agreements.

[2] The underwriting profit of $0.6 million relates to a premium adjustment during the three months ended March 31, 2015 relating to the GreyCastle Life Retro Arrangements transaction. Excluding this transaction, the impact to comprehensive income relating to the GreyCastle Life Retro Arrangements was nil for the three months ended March 31, 2015.

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Goodwill and Other Intangible Assets - Goodwill and other intangible assets rollforward (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2016 USD ($)
Goodwill
Goodwill, beginning of period	$ 1,213,630
Goodwill acquired during the period	13,946
Goodwill, foreign currency translation	1,496
Goodwill, end of period	1,229,072
Intangible assets with an indefinite life
Intangible assets with an indefinite life, beginning of period	682,859
Indefinite-lived intangible assets acquired during the period	8,000
Indefinite-lived intangible assets, foreign currency translation	1,701
Intangible assets with an indefinite life, end of period	692,560
Intangible assets with a definite life
Intangible assets with a definite life, beginning of period	313,777
Identified definite life intangible assets	6,000
Amortization	(5,588)
Identified definite life intangible assets, foreign currency translation	(2,224)
Intangible assets with a definite life, end of period	311,965
Total
Goodwill and other intangible assets, beginning of period	2,210,266
Additions	27,946
Amortization	(5,588)
Foreign currency translation	973
Goodwill and other intangible assets, end of period	$ 2,233,597

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Goodwill and Other Intangible Assets (Details) - USD ($) $ in Thousands				3 Months Ended
	Feb. 01, 2016	Jul. 24, 2015	May. 01, 2015	Mar. 31, 2016	Dec. 31, 2015
Schedule Of Acquired Intangible Assets By Major Class [Line Items]
Intangible Assets, Net (Including Goodwill)				$ 2,233,597	$ 2,210,266
Goodwill acquired during the period				$ 13,946
Allied International Holdings, Inc.
Schedule Of Acquired Intangible Assets By Major Class [Line Items]
Total identified intangible assets	$ 14,000
Goodwill acquired during the period	$ 13,946
New Energy Risk Inc.
Schedule Of Acquired Intangible Assets By Major Class [Line Items]
Goodwill acquired during the period		$ 13,400
Catlin Group Limited
Schedule Of Acquired Intangible Assets By Major Class [Line Items]
Total identified intangible assets			$ 988,000
Goodwill acquired during the period			$ 794,000

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Share Capital - Options valuation assumptions (Details)	3 Months Ended
	Mar. 31, 2016
Stockholders' Equity Note [Abstract]
Dividend yield	2.00%
Risk free interest rate	1.37%
Volatility	21.70%
Expected lives	6 years

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Share Capital - Narrative (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2016	Aug. 06, 2015
Two Thousand Fifteen Share Repurchase Authorization
Shareholders Equity Disclosure [Line Items]
Stock Repurchase Program, Authorized Amount		$ 1,000.0
Stock Repurchased and Retired During Period, Shares	10.0
Stock Repurchased and Retired During Period, Value	$ 355.1
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 348.2
Stock options
Shareholders Equity Disclosure [Line Items]
Weighted Average Grant Date Fair Value Per Stock Option	$ 5.99
Number of Stock Options Granted During the Period	2.2
Restricted stock units
Shareholders Equity Disclosure [Line Items]
Number of Awards Granted During the Period	1.1
Aggregate Grant Date Fair Value of Award	$ 38.3
Deferred Compensation, Share-based Payments
Shareholders Equity Disclosure [Line Items]
Number of Awards Granted During the Period	1.8
Aggregate Grant Date Fair Value of Award	$ 61.3
Performance Shares
Shareholders Equity Disclosure [Line Items]
Number of Awards Granted During the Period	0.7
Share Based Compensation Arrangement Performance Units Maximum Share Payout Number	1.5
Aggregate Grant Date Fair Value of Award	$ 25.6
Minimum
Shareholders Equity Disclosure [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	3 years
Minimum | Performance Shares
Shareholders Equity Disclosure [Line Items]
Performance Units Final Payout Percentage Of Grant Amount	0.00%
Maximum
Shareholders Equity Disclosure [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	4 years
Maximum | Performance Shares
Shareholders Equity Disclosure [Line Items]
Performance Units Final Payout Percentage Of Grant Amount	200.00%
Three Year Option | Restricted stock units
Shareholders Equity Disclosure [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	3 years
Three Year Option | Deferred Compensation, Share-based Payments
Shareholders Equity Disclosure [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	3 years
Four Year Option | Restricted stock units
Shareholders Equity Disclosure [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	4 years
Four Year Option | Deferred Compensation, Share-based Payments
Shareholders Equity Disclosure [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	4 years

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Notes Payable and Debt and Financing Arrangements - Notes payable and debt (Details) - USD ($) $ in Thousands		3 Months Ended
	Mar. 30, 2015	Mar. 31, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Commitment, debt		$ 2,683,248	$ 2,675,000
Notes payable and debt		$ 2,653,895	2,644,970
Percentage ownership of subsidiaries		100.00%
Senior notes | 2.3% Senior Notes due 2018
Debt Instrument [Line Items]
Commitment, debt		$ 300,000	300,000
Notes payable and debt		$ 298,183	298,015
Debt interest rate (percent)		2.30%
Senior notes | 5.75% Senior Notes due 2021
Debt Instrument [Line Items]
Commitment, debt		$ 400,000	400,000
Notes payable and debt		$ 397,630	397,523
Debt interest rate (percent)		5.75%
Senior notes | 6.375% Senior Notes due 2024
Debt Instrument [Line Items]
Commitment, debt		$ 350,000	350,000
Notes payable and debt		$ 349,057	349,029
Debt interest rate (percent)		6.375%
Senior notes | 6.25% Senior Notes due 2027
Debt Instrument [Line Items]
Commitment, debt		$ 325,000	325,000
Notes payable and debt		$ 323,257	323,218
Debt interest rate (percent)		6.25%
Senior notes | 5.25% Senior Notes due 2043
Debt Instrument [Line Items]
Commitment, debt		$ 300,000	300,000
Notes payable and debt		$ 296,328	296,294
Debt interest rate (percent)		5.25%
Subordinated notes | 4.45% Subordinated Notes due 2025
Debt Instrument [Line Items]
Commitment, debt		$ 500,000	500,000
Notes payable and debt		492,723	492,521
Subordinated notes | 5.5% Subordinated Notes due 2045
Debt Instrument [Line Items]
Commitment, debt		500,000	500,000
Notes payable and debt		$ 488,469	488,370
XL Cayman | Subordinated notes | 4.45% Subordinated Notes due 2025
Debt Instrument [Line Items]
Debt interest rate (percent)	4.45%	4.45%
Debt issue price, as a percentage of face value	99.633%
Net proceeds on issuance of debt	$ 492,200
Debt issuance cost	$ 5,900
XL Cayman | Subordinated notes | 5.5% Subordinated Notes due 2045
Debt Instrument [Line Items]
Debt interest rate (percent)	5.50%	5.50%
Debt issue price, as a percentage of face value	99.115%
Net proceeds on issuance of debt	$ 488,400
Debt issuance cost	$ 7,200
Allied International Holdings, Inc. | Trust Preferred Securities Subject to Mandatory Redemption [Member] | Trust Preferred Securities, Face $8 million, due 2035
Debt Instrument [Line Items]
Commitment, debt		$ 8,248	0
Notes payable and debt		$ 8,248	$ 0
Allied International Holdings, Inc. | Trust Preferred Securities Subject to Mandatory Redemption [Member] | Trust Preferred Securities, Face $8 million, due 2035 | 3 month LIBOR
Debt Instrument [Line Items]
Spread on variable rate		3.75%

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Notes Payable and Debt and Financing Arrangements - Letter of credit facilities and other sources of collateral (Details) $ in Thousands		Mar. 31, 2016 USD ($) Credit_Facilities	Dec. 31, 2015 USD ($)
Line of Credit Facility [Line Items]
Number of letter of credit facilities available | Credit_Facilities		15
Revolving credit facility
Line of Credit Facility [Line Items]
Available credit facilities - remaining borrowing capacity		$ 823,500	$ 822,900
Available letter of credit facilities - commitments		1,400,000
Available letter of credit facilities - in use		526,500	527,100
Letter of credit facilities
Line of Credit Facility [Line Items]
Available letter of credit facilities - commitments	[1]	4,503,617	4,463,041
Available letter of credit facilities - in use		$ 2,548,085	$ 2,515,653	[1],[2]
Collateralized by certain assets of the Company’s investment portfolio	[1]	51.30%	50.90%

[1] As of March 31, 2016 and December 31, 2015, there were fifteen available credit facilities

[2] As of March 31, 2016 and December 31, 2015 the stated portion of allowable credit facilities permitted to be utilized for revolving loans was $1.4 billion. However, as of March 31, 2016 and December 31, 2015, $526.5 million and $527.1 million, respectively, of such facilities' limits were utilized to issue letters of credit, leaving $823.5 million and $822.9 million, respectively, available either to issue additional letters of credit or to support other operating or financing needs under these particular facilities.

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Related Party Transactions - Schedule of related party transactions activity (Details) $ in Thousands		3 Months Ended
	Jul. 24, 2015 USD ($)	Mar. 31, 2016 USD ($) management_company		Mar. 31, 2015 USD ($)	Dec. 31, 2015 management_company
Related Party Transaction [Line Items]
Reported net premiums written		$ 3,064,759		$ 1,851,249
Net losses and loss expenses incurred		1,382,485		769,827
Reported acquisition costs		$ 403,267	[1]	153,696
Number of investment management companies | management_company		6			6
Investment manager affiliates
Related Party Transaction [Line Items]
Reported net premiums written		$ 24,016		27,076
Net losses and loss expenses incurred		12,060		9,100
Reported acquisition costs		$ 11,604		$ 9,012
New Energy Risk Inc.
Related Party Transaction [Line Items]
Percentage of voting interests acquired	63.63%
Ownership percentage held by noncontrolling interest	5.21%
Cash consideration	$ 8,800
Ownership percentage following additional purchase of shares	94.79%

[1] The Company has reflected the amortization of certain fair value adjustments recorded in conjunction with the Catlin Acquisition within the respective segments.

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Variable Interest Entities (Details) - Variable Interest Entity, Primary Beneficiary [Member] - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015
Variable Interest Entity [Line Items]
Noncontrolling Interest in Variable Interest Entity	$ 71.2	$ 70.5
Variable Interest Entity, Consolidated, Carrying Amount, Assets	178.5	175.8
New Ocean Capital Management Ltd [Member]
Variable Interest Entity [Line Items]
Noncontrolling Interest in Variable Interest Entity	$ 0.7	$ 0.4

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Computation of Earnings Per Ordinary Share and Ordinary Share Equivalent - Computation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Basic earnings per ordinary share & ordinary share equivalents outstanding:
Net income (loss) attributable to ordinary shareholders	$ 21,885	$ 36,281
Weighted average ordinary shares outstanding - basic	291,969	255,724
Basic earnings per ordinary share & ordinary share equivalents outstanding	$ 0.07	$ 0.14
Diluted earnings per ordinary share & ordinary share equivalents outstanding:
Weighted Average Number Diluted Shares Outstanding Adjustment	4,697	4,980
Weighted average ordinary shares outstanding - diluted (in thousands of shares)	296,666	260,704
Diluted earnings per ordinary share & ordinary share equivalents outstanding	$ 0.07	$ 0.14
Dividends per ordinary share	$ 0.20	$ 0.16

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Computation of Earnings Per Ordinary Share and Ordinary Share Equivalent - Narrative (Details) - shares shares in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Share-based compensation plans
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (shares)	6.0	5.0

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Commitments and Contingencies (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2016 USD ($) Guarantee_contracts	Mar. 31, 2015	Dec. 31, 2015 USD ($)
Guarantor Obligations [Line Items]
Schedule of Insured Financial Obligations with Credit Deterioration, Insured Contractual Payments Outstanding	$ 80,800
Total gross claim liability recorded	$ 0		$ 0
Financial Guarantee Insurance Contracts Outstanding Weighted Average Contract Period	23 years 11 months 12 days	24 years 2 months 12 days
Financial Guarantee Related to Securities Including Some Issued By European Financials [Member]
Guarantor Obligations [Line Items]
Number Of Financial Guarantee Contracts | Guarantee_contracts	2

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Accumulated Other Comprehensive Income (Loss) - Changes in AOCI, net of tax (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016		Mar. 31, 2015	Dec. 31, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance, net of tax	$ 686,616		$ 1,484,458
OCI before Reclassifications	558,557		287,646
Amounts reclassified from AOCI	(114,842)		(64,750)
Tax benefit (expense)	(35,774)		(2,184)
Comprehensive income (loss)	407,941		220,712
Ending balance, net of tax	1,094,557		1,705,170
Change in adjustments related to future policy benefit reserves, net of tax	(17,035)		(60,356)
Unrealized gains (losses) on investments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance, net of tax	803,094	[1]	1,590,114
OCI before Reclassifications	575,022	[1]	254,267
Amounts reclassified from AOCI	(117,114)	[1]	(74,781)
Tax benefit (expense)	(34,707)	[1]	(5,805)
Comprehensive income (loss)	423,201	[1]	173,681
Ending balance, net of tax	1,226,295	[1]	1,763,795
Cumulative impact of net unrealized gains losses on future policy benefit reserve	257,400			$ 274,400
Change in adjustments related to future policy benefit reserves, net of tax	(17,000)
OTTI losses recognized in AOCI
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance, net of tax	(57,502)		(76,047)
OCI before Reclassifications	0		0
Amounts reclassified from AOCI	2,311		9,936
Tax benefit (expense)	(44)		(78)
Comprehensive income (loss)	2,267		9,858
Ending balance, net of tax	(55,235)		(66,189)
Foreign currency translation adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance, net of tax	(36,503)		(11,188)
OCI before Reclassifications	(15,416)		32,404
Amounts reclassified from AOCI	0		0
Tax benefit (expense)	(1,023)		3,699
Comprehensive income (loss)	(16,439)		36,103
Ending balance, net of tax	(52,942)		24,915
Underfunded pension liability
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance, net of tax	(24,641)		(20,789)
OCI before Reclassifications	(1,049)		975
Amounts reclassified from AOCI	0		0
Tax benefit (expense)	0		0
Comprehensive income (loss)	(1,049)		975
Ending balance, net of tax	(25,690)		(19,814)
Cash flow hedge
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance, net of tax	2,168		2,368
OCI before Reclassifications	0		0
Amounts reclassified from AOCI	(39)		95
Tax benefit (expense)	0		0
Comprehensive income (loss)	(39)		95
Ending balance, net of tax	$ 2,129		$ 2,463

[1] . As of December 31, 2015, the cumulative impact of the Shadow Adjustments was $274.4 million. During the three months ended March 31, 2016, net movements of $(17.0) million were recorded, resulting in a total cumulative net impact of Shadow Adjustments on future policy benefit reserves of $257.4 million as of March 31, 2016.

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Accumulated Other Comprehensive Income (Loss) - Details About AOCI Components (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016		Mar. 31, 2015
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Total before tax	$ (114,842)		$ (64,750)
Tax benefit (expense)	(22,295)		(24,218)
Unrealized gains (losses) on investments
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Total before tax	(117,114)	[1]	(74,781)
OTTI losses recognized in AOCI
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Total before tax	2,311		9,936
Accumulated Translation Adjustment [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Total before tax	0		0
Underfunded pension liability
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Total before tax	0		0
Cash flow hedge
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Total before tax	(39)		95
Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Total before tax	(114,842)		(64,750)
Tax benefit (expense)	1,533		84
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	(113,309)		(64,666)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Unrealized gains (losses) on investments
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Net realized gains (losses) on investments sold	(116,988)		(78,551)
OTTI on investments	21,928		15,724
Total before tax	(117,114)		(74,781)
Tax benefit (expense)	1,577		87
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	(115,537)		(74,694)
Reclassification out of Accumulated Other Comprehensive Income [Member] | OTTI losses recognized in AOCI
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Net realized gains (losses) on investments sold	2,313		9,875
OTTI on investments	(2)		61
Total before tax	2,311		9,936
Tax benefit (expense)	(44)		(3)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	2,267		9,933
Reclassification out of Accumulated Other Comprehensive Income [Member] | Cash flow hedge
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Total before tax	(39)		95
Tax benefit (expense)	0		0
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	(39)		95
Life Funds Withheld Assets
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Net realized gains (losses) on investments sold	34,416		52,738
OTTI on investments	(2,346)		(5,209)
Change in adjustments related to future policy benefit reserves, net of tax	(22,053)		(11,954)
Life Funds Withheld Assets | Reclassification out of Accumulated Other Comprehensive Income [Member] | Unrealized gains (losses) on investments
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Change in adjustments related to future policy benefit reserves, net of tax	$ (22,054)		$ (11,954)

[1] . As of December 31, 2015, the cumulative impact of the Shadow Adjustments was $274.4 million. During the three months ended March 31, 2016, net movements of $(17.0) million were recorded, resulting in a total cumulative net impact of Shadow Adjustments on future policy benefit reserves of $257.4 million as of March 31, 2016.