Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2017

Commitments And Contingencies Disclosure [Abstract]

The following table summarizes our material commitments and obligations as of December 31, 2017:

			By Period
	Total		Less than 1 year		1 to 3 years		3 to 5 years		More than 5 years
	(in millions)
Property leases, net of sublease income (1)	$	228	$	28	$	53	$	51	$	96
Expected interest and commitment fee payments on 2015 Credit Facility (2)		34		7		16		11		—
Total (3)	$	262	$	35	$	69	$	62	$	96

(1)	Estimated future minimum rental payments under operating leases with non-cancelable lease terms, including our corporate headquarters lease in Needham, MA.

(2)

Expected interest payments on the 2015 Credit Facility are based on the effective interest rate and outstanding borrowings as of December 31, 2017, but could change significantly in the future. Amounts assume that our existing debt is repaid at the end of the credit agreement and do not assume additional borrowings or refinancing of existing debt. Expected commitment fee payments are based on the unused portion of credit facility, issued letters of credit, and current effective commitment fee rate as of December 31, 2017; however, these variables could change significantly in the future. Refer to “Note 9— Debt” and “Note 20— Subsequent Events” for additional information on our 2015 Credit Facility and subsequent repayment of our outstanding borrowings on our 2015 Credit Facility in 2018, respectively.

(3)

Excluded from the table was $127 million of unrecognized tax benefits, including accrued interest, that we have recorded in other long-term liabilities on our consolidated balance sheet for which we cannot make a reasonably reliable estimate of the amount and period of payment. We do not anticipate any material changes in the next year. Also excluded from the table was $61 million of estimated Transition Tax related to 2017 Tax Act recorded in long-term liabilities on the consolidated balance sheet at December 31, 2017, that we believe the majority will be paid more than five years from December 31, 2017. Refer to “Note 10 – Income Taxes,” for additional information on these amounts.

Future Minimum Commitments Under Our Corporate Headquarters Lease and Other Non-Cancelable Operating Leases

As of December 31, 2017, future minimum commitments under our corporate 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	Corporate Headquarters Lease (1)		Other Operating Leases		Sublease Income			Total Lease Commitments (Net of Sublease Income)
	(in millions)
2018	$	9	$	22	$	(3	)	$	28
2019		9		21		(3	)		27
2020		9		19		(2	)		26
2021		10		17		(2	)		25
2022		10		17		(1	)		26
Thereafter		77		19		—			96
Total	$	124	$	115	$	(11	)	$	228

(1)	Amount includes an $84 million financing obligation, which we have recorded in other long-term liabilities on our consolidated balance sheet at December 31, 2017, related to our corporate headquarters lease.