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Debt - Schedule of Convertible Senior Notes (Details) - USD ($) $ in Millions | Dec. 31, 2021 | May 13, 2021 | Apr. 02, 2021
--- | --- | --- | ---
Debt Instrument [Line Items] |  |  |
Principal | $ 3,855 |  | $ 3,620
Less: unamortized discount and issuance costs | (12) |  | (19)
Total debt | $ 3,843 |  | 3,601
Convertible Debt | New 2.00% Convertible Unsecured Notes due August 15, 2022 |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate | 2.00% |  |
Principal | $ 625 |  | 625
Less: unamortized discount and issuance costs | (3) |  | (5)
Total debt | 622 |  | 620
Equity component net of tax | $ 56 |  | 56
Convertible Debt | New 2.50% Convertible Senior Notes due April 1, 2022 |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate | 2.50% | 2.50% |
Principal | $ 0 |  | 250
Less: unamortized discount and issuance costs |  |  | 0
Total debt |  |  | 250
Equity component net of tax |  |  | $ 43

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