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Debt - Schedule of Long-Term Debt (Details) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Deferred debt issuance costs	$ (21)	$ (23)
Total	$ 2,129	2,127
Senior notes | 4.375% Notes
Debt Instrument [Line Items]
Percentage of contractual interest rate on notes	4.375%
Non-current portion of long-term debt	$ 800	800
Senior notes | 5.375% Notes
Debt Instrument [Line Items]
Percentage of contractual interest rate on notes	5.375%
Non-current portion of long-term debt	$ 700	700
Senior notes | 3.875% Notes
Debt Instrument [Line Items]
Percentage of contractual interest rate on notes	3.875%
Non-current portion of long-term debt	$ 650	$ 650

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Long-Term Debt, Noncurrent, Net Of Unamortized Debt Discount

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

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Amount, after accumulated amortization, of debt issuance costs classified as noncurrent. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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