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Derivatives - Interest-Rate Derivatives (Details) $ in Millions | 6 Months Ended
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Jun. 30, 2021 USD ($)
Interest Rate Swaps |
Derivative [Line Items] |
Net cash payments related to settlements | $ 47
Collateral paid with respect to interest rate swap agreements | 49
Interest Rate Swap, 6.348% |
Derivative [Line Items] |
Notional Principal Amount | $ 400
Weighted-Average Interest Rate | 6.348%
Interest Rate Swap, 6.662% |
Derivative [Line Items] |
Notional Principal Amount | $ 350
Weighted-Average Interest Rate | 6.662%
Interest Rate Swap, 6.709% |
Derivative [Line Items] |
Notional Principal Amount | $ 275
Weighted-Average Interest Rate | 6.709%
Interest Rate Swap, 6.445% |
Derivative [Line Items] |
Notional Principal Amount | $ 450
Weighted-Average Interest Rate | 6.445%

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