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Debt - Schedule of Long-Term Debt (Details) - USD ($) $ in Millions | Sep. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Debt Instrument [Line Items] |  |
Deferred debt issuance costs | $ (20) | $ (23)
Total | $ 2,130 | 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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