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Debt - Commercial Paper Program (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Debt Instrument [Line Items] |  |
Term of facility | 2 months | 1 month
Weighted-average interest rate (as a percent) | 0.32% | 0.30%
Commercial Paper Program |  |
Debt Instrument [Line Items] |  |
Maximum borrowing capacity | $ 1,500,000,000 | $ 1,000,000,000
Short-term debt | $ 1,170,000,000 | $ 130,000,000

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