In August 2018, the Financial Accounting Standards Board (“FASB”) issued new accounting guidance which require a customer in a cloud computing arrangement (i.e., hosting arrangement) that is a service contract to follow the internal-use software guidance to determine which implementation costs to capitalize as assets or expense as incurred. The accounting for the cost of the hosting component of the arrangement (i.e., service costs the customer pays for the cloud computing service) is not affected by this new guidance. The Company uses both internally-developed software and third-party software to operate its business. This guidance is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019, with early adoption permitted, including adoption in any interim period. Entities have the option to apply the guidance retrospectively or prospectively to all implementation costs incurred after the date of adoption. We plan on adopting this new guidance on January 1, 2020 on a prospective basis without adjusting the comparative periods presented. We do not expect the adoption of this new guidance will have a material impact on our consolidated financial statements and related disclosures.

In June 2016, the FASB issued new accounting guidance which replaces the existing incurred loss impairment model with an expected loss methodology on the measurement of credit losses for financial assets measured at amortized cost, which includes accounts receivable and available-for-sale debt securities. For financial assets measured at amortized cost, this new guidance requires an entity to: (1) estimate its lifetime expected credit losses upon recognition of the financial assets and establish an allowance to present the net amount expected to be collected; (2) recognize this allowance and changes in the allowance during subsequent periods through net income; and (3) consider relevant information about past events, current conditions and reasonable and supportable forecasts in assessing the lifetime expected credit losses. For available-for-sale debt securities, this new guidance made several targeted amendments to the existing other-than-temporary impairment model, including: (1) requiring disclosure of the allowance for credit losses; (2) allowing reversals of the previously recognized credit losses until the entity has the intent to sell, is more-likely-than-not required to sell the securities or the maturity of the securities; (3) limiting impairment to the difference between the amortized cost basis and fair value; and (4) not allowing entities to consider the length of time that fair value has been less than amortized cost as a factor in evaluating whether a credit loss exists. This guidance is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019, with early adoption permitted, including interim periods within those fiscal years beginning after December 15, 2018. Entities are required to adopt this new guidance on a modified retrospective basis with a cumulative-effect adjustment to retained earnings as of the beginning of the period of adoption. We plan on adopting this new guidance on January 1, 2020 and are in the process of evaluating the impact of adopting this new guidance on our consolidated financial statements and related disclosures.

In February 2016, the FASB issued new guidance which revises the accounting for leases (“ASC 842”). ASC 842 requires entities that lease assets to recognize right-of-use (ROU) assets representing its right to use the underlying asset for the lease term and lease liabilities related to the rights and obligations created by those leases on the balance sheet regardless of whether they are classified as finance or operating leases, with classification affecting the pattern and presentation of expenses and cash flows on our consolidated financial statements. In addition, new disclosures are required to meet the objective of enabling users of the financial statements to better understand the amount, timing, and uncertainty of cash flows arising from leases. We adopted ASC 842 on January 1, 2019 and elected the modified retrospective transition method that allowed for a cumulative-effect adjustment in the period of adoption. Financial results for reporting periods beginning after January 1, 2019 are presented under ASC 842, while prior period amounts were not adjusted and continue to be reported under the accounting standards in effect for those periods. The Company has also updated its accounting policies to reflect the new guidance and have implemented lease accounting software to support its accounting process, financial reporting, and new financial disclosure requirements.

We elected the following practical expedients available in transition upon adoption of ASC 842 and accounting policy updates: 1) the “practical expedients package of three”, which allows us to not reassess the following: a) whether any expired or existing contracts are or contain a lease as of the adoption date, b) the lease classification for any expired or existing leases as of the adoption date; and c) the accounting treatment for initial direct costs for existing leases as of the adoption date; 2) the “short-term lease recognition exemption”, which allows entities to forego recognition of ROU assets and lease liabilities for leases with a lease term of twelve months or less and which also do not include an option to renew the lease term that the entity is reasonably certain to exercise; 3) elect by asset class as an accounting policy, to combine lease and non-lease components as a single component and subsequently account for the combined single component as the lease component; and 4) apply the portfolio approach to similar types of leases where the Company does not reasonably expect the outcome to differ materially from applying the new guidance to individual leases.

The adoption of ASC 842 did not have a material impact to our unaudited condensed consolidated statement of operations during the three and six months ended June 30, 2019 or unaudited condensed consolidated statement of cash flows during the six months ended June 30, 2019. The effect on our unaudited condensed consolidated balance sheet as of January 1, 2019 from the adoption of ASC 842 is as follows:

	Balance at December 31, 2018		Adjustments due to ASC 842			Balance at January 1, 2019
	(in millions)
Assets:
Prepaid expenses and other current assets	$	33	$	(3	)	$	30
Property and equipment, net (1)		253		8			261
Operating lease right-of-use assets (1)		—		75			75
Deferred income taxes, net		27		(1	)		26
Other long-term assets		98		(2	)		96

Liabilities:
Accrued expenses and other current liabilities (2)		151		21			172
Other long-term liabilities (1)		282		53			335
Retained earnings (3)	$	1,043	$	3		$	1,046

We lease office space in a number of countries around the world under non-cancelable lease agreements. Our corporate headquarters lease (“Headquarters Lease”) is our most significant office space lease. The Company has also entered into data center and certain equipment leases, such as network equipment and other leases, which are not material to our unaudited condensed consolidated financial statements. We determine whether a contract is or contains a lease at inception of a contract. We define a lease as a contract, or part of a contract, that conveys the right to control the use of identified property, plant, or equipment (an identified asset) for a period of time in exchange for consideration. Control over the use of the identified asset means that we have both the right to obtain substantially all of the economic benefits from the use of the asset and the right to direct the use of the asset.

Our lease contracts contain both lease and non-lease components. We account separately for the lease and non-lease components of office space leases and certain other leases, such as data center leases. We allocate the consideration in the contract to the lease and non-lease components based on each component’s relative standalone price. We determine standalone prices for the lease components based on the prices for which other lessors lease similar assets on a standalone basis. We determine standalone prices for the non-lease component based on the prices that other suppliers charge for services for similar assets on a standalone basis. If observable standalone prices are not readily available, we estimate the standalone prices based on other available observable information. However, for certain categories of equipment leases, such as network equipment and others, we account for the lease and non-lease components as a single lease component. Additionally, for certain equipment leases that have similar characteristics, we apply a portfolio approach to effectively account for operating lease ROU assets and operating lease liabilities, hence we do not expect the outcome to differ materially from applying the new guidance to individual leases.

The Company uses its estimated incremental borrowing rate as the discount rate in measuring the present value of our lease payments given the rate implicit in our leases is not typically readily determinable. Given we do not currently borrow on a collateralized basis, our incremental borrowing rate is estimated to approximate the interest rate in which the Company would expect to pay on a collateralized basis over a similar term and payments, and in economic environments where the leased asset is located. We use the portfolio approach to determine the discount rate for leases with similar characteristics or when the Company is reasonably certain that doing so would not materially affect the accounting for those leases to which a single discount rate is applied.

Our office space leases, exclusive of our Headquarters Lease, are operating leases, which expire at various dates with the latest maturity in June 2027. Based on the present value of remaining lease payments on the Company's existing leases, we recognized $88 million of both operating ROU assets and operating lease liabilities, respectively on our unaudited condensed consolidated balance sheet upon adoption of ASC 842, as of January 1, 2019. These operating ROU assets were then reduced by a net deferred rent balance of $13 million as of January 1, 2019, which primarily consisted of existing deferred and prepaid rent balances.

Operating lease ROU assets and liabilities commencing after January 1, 2019 are recognized at lease commencement date, or the date the lessor makes the leased asset available for use, based on the present value of lease payments over the lease term using the Company’s estimated incremental borrowing rate. ROU assets related to operating leases comprise the initial lease liability, and are then adjusted for any prepaid or deferred rent payments, unamortized initial direct costs, and lease incentives received. Amortization expense for operating lease ROU assets and interest accretion on operating lease liabilities are recognized as a single operating lease cost in our consolidated statement of operations, which results effectively in recognition of rent expense on a straight-line basis over the lease period. The carrying amount of operating lease liabilities are (1) accreted to reflect interest using the incremental borrowing rate if the rate implicit in the lease is not readily determinable; and (2) reduced to reflect lease payments made during the period. We present the combination of both the amortization of operating lease ROU assets and the change in the operating lease liabilities in the same line item in the adjustments to reconcile net income to net cash provided by operating activities in our unaudited condensed consolidated statement of cash flows. Lease incentives are recognized as reductions of rental expense on a straight-line basis over the term of the lease. Certain of our operating leases include options to extend the lease terms for up to 6 years and/or terminate the leases within 1 year, which we include in our lease term if we are reasonably certain to exercise these options. Payments under our operating leases are primarily fixed, however, certain of our operating lease agreements include rental payments which are adjusted periodically for inflation. We recognize these costs as variable lease costs on our unaudited condensed consolidated statement of operations, which were not material during the three and six months ended June 30, 2019 and 2018. In addition, our short-term lease costs were not material in any period. As of June 30, 2019, our operating lease ROU assets was $75 million as presented on our unaudited condensed consolidated balance sheet.

In June 2013, we entered into our Headquarters Lease. Pursuant to the Headquarters Lease, the landlord built an approximately 280,000 square foot rental building in Needham, Massachusetts (the “Premises”), and leased the Premises to the Company as our new corporate headquarters for an initial term of 15 years and 7 months or through December 2030. The Company also has an option to extend the term of the Headquarters Lease for two consecutive terms of five years each. The Company was deemed to be the owner of the Premises for accounting purposes only during the construction period under legacy GAAP accounting rules for lease accounting, or ASC 840. Accordingly, the Company recorded project construction costs during the construction period incurred by the landlord as a construction-in-progress asset and a related construction financing obligation on our consolidated balance sheet. The amounts that the Company incurred for normal tenant improvements and structural improvements had also been recorded to the construction-in-progress asset. Upon completion of construction at the end of the second quarter of 2015, we evaluated the construction-in-progress asset and construction financing obligation for de-recognition under the criteria for “sale-leaseback” treatment under ASC 840. We concluded that it did not meet the provisions for sale-leaseback accounting. Therefore, the Headquarters Lease was accounted for as a

financing obligation through December 31, 2018, in which we depreciated the building asset over its estimated useful life and incurred interest expense related to the financing obligation, imputed using the effective interest rate method.

Upon the adoption of ASC 842 on January 1, 2019, we derecognized the previous assets and liabilities recorded for the Headquarters Lease described above, with the exception of net assets and liabilities of $26 million, primarily related to structural improvements paid by the Company, net of tenant incentives and accumulated amortization, which is classified as net prepaid rent under the new guidance. The Company then assessed the lease classification of our Headquarters Lease and concluded it should be classified and accounted for as a finance lease upon adoption on January 1, 2019. Accordingly, on January 1, 2019, we recognized a finance lease ROU asset and a finance lease liability of $114 million and $88 million, respectively, on our unaudited condensed consolidated balance sheet. The difference between the finance lease ROU asset and finance lease liability represents the aforementioned $26 million of net prepaid rent, and is being amortized straight-line over the remaining lease term. As of June 30, 2019, the ROU asset related to our Headquarters Lease was $110 million, net of accumulated amortization of $5 million, and is included in the property and equipment, net on our unaudited condensed consolidated balance sheet.

Finance lease ROU assets and finance lease liabilities commencing after January 1, 2019 are recognized similar to an operating lease, at the lease commencement date or the date the lessor makes the leased asset available for use. Finance lease ROU assets are generally amortized on a straight-line basis over the lease term, and the carrying amount of the finance lease liabilities are (1) accreted to reflect interest using the incremental borrowing rate if the rate implicit in the lease is not readily determinable, and (2) reduced to reflect lease payments made during the period. Amortization expense for finance lease ROU assets and interest accretion on finance lease liabilities are recorded to depreciation and interest expense, respectively, in our consolidated statement of operations.

We did not update any financial information or provide any disclosures required under the new guidance for the three and six months ended June 30, 2018, respectively, or as of December 31, 2018. The disclosures provided below for the three and six months ended June 30, 2018, respectively, or as of December 31, 2018 are based on the disclosure requirements under ASC 840.

	Three months ended June 30, 2019			Six months ended June 30, 2019
	(in millions)
Operating lease cost (1)	$	6		$	12
Finance lease cost
Amortization of right-of-use assets (2)	$	2		$	5
Interest on lease liabilities (3)		1			2
Total finance lease cost	$	3		$	7
Sublease income (1)		(1	)		(2	)
Total lease cost, net	$	8		$	17

Additional information related to our leases is as follows for the periods presented:

	Six months ended June 30, 2019
Supplemental Cash Flows Information:	(in millions)
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash outflows from operating leases	$	14
Operating cash outflows from finance lease		2
Financing cash outflows from finance lease (1)		3

Right-of-use assets obtained in exchange for lease liabilities:
Operating leases (2)	$	97
Finance lease (3)		88

	As of June 30, 2019
Weighted-average remaining lease term:
Operating leases	4.8 years
Finance lease	11.5 years

Weighted-average discount rate:
Operating leases		4.32%
Finance lease		4.49%

Future lease payments under non-cancellable leases as of June 30, 2019 were as follows:


Year Ending December 31,	Operating Leases			Finance Lease
	(in millions)
2019 (excluding the six months ended June 30, 2019)	$	10		$	4
2020		21			9
2021		20			10
2022		19			10
2023		12			10
Thereafter		12			67
Total future lease payments		94			110
Less imputed interest		(9	)		(25	)
Total lease liabilities	$	85		$	85

Reported on unaudited condensed consolidated balance sheet as of June 30, 2019	Operating Leases			Finance Lease
Accrued expenses and other current liabilities	$	18		$	5
Other long-term liabilities		67			80
Total lease liabilities	$	85		$	85

As of December 31, 2018, future minimum lease commitments under our Headquarters Lease and other non-cancelable operating leases for office space with terms of more than one year and contractual sublease income were as follows:

Year	Headquarters Lease (1)		Other Operating Leases		Sublease Income			Total Lease Commitments (Net of Sublease Income)
	(in millions)
2019		9	$	19	$	(3	)	$	25
2020		9		18		(2	)		25
2021		10		16		(2	)		24
2022		10		16		(2	)		24
2023		10		9		—			19
Thereafter		67		9		—			76
Total	$	115	$	87	$	(9	)	$	193

As of June 30, 2019, we did not have any additional operating or finance leases that have not yet commenced but that create significant rights and obligations for us.

Other than our accounting policy for leases, as described above, there have been no other significant changes to our significant accounting policies and estimates since December 31, 2018, as described under “Note 2: Significant Accounting Policies”, in the notes to consolidated financial statements in Item 8 of our Annual Report on Form 10-K for the year ended December 31, 2018.