Debt - Two Thousand Fifteen Credit Facility - Additional Information (Details) - USD ($)				1 Months Ended	3 Months Ended	12 Months Ended
		Dec. 17, 2020	May 05, 2020	Jun. 30, 2015	Mar. 31, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Jul. 01, 2020	May 12, 2017
Debt Instrument [Line Items]
Total interest and commitment fees						$ 35,000,000	$ 7,000,000	$ 12,000,000
Unpaid interest and commitment fees	[1]					18,000,000
Payments of financing costs for amendments to 2015 credit facility						7,000,000
Amended 2015 Credit facility On May 5th, 2020
Debt Instrument [Line Items]
Minimum liquidity required			$ 150,000,000
2015 Credit Facility
Debt Instrument [Line Items]
Total interest and commitment fees						10,000,000	2,000,000	3,000,000
2015 Credit Facility | Revolving Credit Facility
Debt Instrument [Line Items]
Credit facility, expiration period				5 years
Outstanding borrowings						$ 0		0
Amount borrowed					$ 700,000,000
Line Of Credit Facility Unused Capacity Commitment Fee Percentage						0.50%
Repayments of Debt								230,000,000
Cash repatriation of foreign earnings as a result of 2017 Tax Act								$ 325,000,000
Debt instrument, issuances costs						$ 5,000,000
2015 Credit Facility | Revolving Credit Facility | Interest Expense
Debt Instrument [Line Items]
Debt instrument, issuances costs						2,000,000
2015 Credit Facility | Revolving Credit Facility | Other Long Term Asset
Debt Instrument [Line Items]
Payments of financing costs for amendments to 2015 credit facility						$ 7,000,000
2015 Credit Facility | Revolving Credit Facility | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate						2.25%
Floor Interest Rate						1.00%
2015 Credit Facility | Letter of Credit
Debt Instrument [Line Items]
Borrowing capacity under Credit Facility						$ 15,000,000
Letters of credit outstanding amount						3,000,000	$ 3,000,000
2015 Credit Facility | Borrowings On Same Day Notice
Debt Instrument [Line Items]
Borrowing capacity under Credit Facility						$ 40,000,000
2015 Credit Facility | Amended 2015 Credit facility On May 12th, 2017 | Revolving Credit Facility
Debt Instrument [Line Items]
Borrowing capacity under Credit Facility			1,000,000,000	$ 1,000,000,000.0						$ 1,200,000,000
Credit facility, maturity date						Jun. 26, 2020
Credit facility, extended maturity date						May 12, 2022
Credit Facility, description						On May 12, 2017, the 2015 Credit Facility was amended to, among other things, (i) increase the aggregate amount of revolving loan commitments available from $1.0 billion to $1.2 billion; and (ii) extend the maturity date of the 2015 Credit Facility from June 26, 2020 to May 12, 2022.
2015 Credit Facility | Amended 2015 Credit facility On May 5th, 2020 | Revolving Credit Facility
Debt Instrument [Line Items]
Borrowing capacity under Credit Facility			$ 1,000,000,000.0
Credit Facility, description						On May 5, 2020, we amended the 2015 Credit Facility to, among other things, suspend the leverage ratio covenant on this facility beginning in the second quarter of 2020 and ending prior to September 30, 2021 (or such earlier date as elected by the Company), and replacing it with a minimum liquidity covenant, or the Leverage Covenant Holiday, that requires us to maintain $150 million of unrestricted cash, cash equivalents and short-term investments less deferred merchant payables plus available revolver capacity, secured the obligations under the agreement, as well as decrease the aggregate amount of revolving loan commitments available to $1.0 billion from $1.2 billion.
2015 Credit Facility | Amended Credit Agreement On December 17th 2020 | Revolving Credit Facility
Debt Instrument [Line Items]
Borrowing capacity under Credit Facility		$ 500,000,000
Credit facility, maturity date			May 12, 2022			May 12, 2022
Credit facility, extended maturity date		May 12, 2024				May 12, 2024
Credit Facility, description						On December 17, 2020, we amended the 2015 Credit Facility to, among other things, continue the suspension of the requirement for quarterly testing of compliance with the leverage ratio covenant until the earlier of (a) the first day after June 30, 2021 through maturity on which borrowings and other revolving credit utilizations under the revolving commitments exceed $200 million, and (b) the election of the Company (the “Covenant Changeover Date”) , at which time the leverage ratio covenant will be reinstated. The amendment also decreased the aggregate amount of revolving loan commitments available to $500 million from $1.0 billion and extended the maturity date of the 2015 Credit Facility from May 12, 2022 to May 12, 2024.
Maximum borrowings allowed under minimum liquidity covenant									$ 200,000,000

[1] Amount relates primarily to unpaid interest accrued on our Senior Notes. Refer to “Note 10: Debt” for further information.