CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands	3 Months Ended				9 Months Ended
	Sep. 30, 2011		Sep. 30, 2010		Sep. 30, 2011		Sep. 30, 2010
Net income (loss) attributable to XL Group plc	$ 42,398	[1]	$ 77,543	[1]	$ 40,777	[1]	$ 415,428	[1]
Impact of adoption of new authoritative embedded derivative guidance, net of tax			31,917				31,917
Change in net unrealized gains (losses) on investments, net of tax	110,124		421,905		291,330		1,285,845
Change in net unrealized gains (losses) on affiliate and other investments, net of tax	2,954		8,721		35,620		25,113
Change in OTTI losses recognized in other comprehensive income, net of tax	3,995		49,465		28,119		81,102
Change in underfunded pension liability	1,684		(4,045)		1,287		(478)
Change in value of cash flow hedge	110		110		330		330
Change in net unrealized gain (loss) on future policy benefit reserves							(3,714)
Foreign currency translation adjustments, net	(85,635)		104,847		(1,278)		(3,461)
Comprehensive income (loss)	$ 75,630		$ 690,463		$ 396,185		$ 1,832,082

[1] During the first quarter of 2011, the Redeemable Series C preference ordinary shares were reclassified as Non-controlling interest - Redeemable Series C preference ordinary shares and Series E preference ordinary shares were reclassified as Non-controlling interest in equity of consolidated subsidiaries on the Company's consolidated balance sheet as a result of changes in ownership structure arising as part of the Company's redomestication of the ultimate parent holding company to Ireland as of July 1, 2010. Accordingly, preference share dividends declared are recorded as Non-controlling interests rather than as Preference share dividends within the consolidated statements of income from July 1, 2010 onwards. See Note 1, "Basis of Preparation and Consolidation" for additional details. During the third quarter of 2011, all outstanding Redeemable Series C preference ordinary shares were repurchased and canceled.