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Long-Term Debt- Senior Notes due 2029 (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Sep. 24, 2021
Long-term debt |  |  |  |
Interest rate (as a percent) | 4.30% |  |  |
Amortization of debt issuance costs and discounts | $ 177 | $ 80 | $ 8 |
Senior Notes |  |  |  |
Long-term debt |  |  |  |
Interest rate (as a percent) | 4.625% |  |  |
Senior Notes | Senior Notes |  |  |  |
Long-term debt |  |  |  |
Long-term debt, gross |  |  |  | $ 1,200

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