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Debt - Schedule of Long-Term Debt (Details) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Deferred debt issuance costs	$ (22)	$ (23)
Total	$ 2,128	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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- Definition

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

+ References

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- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28555-108399

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Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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