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Risk Management - Interest Rate Risk Management (Details) $ in Millions | Dec. 31, 2020 USD ($)
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Fair Value Hedging | Fixed-To-Variable Interest Rate Contracts [Member] | Designated as Hedging Instrument |
Derivative [Line Items] |
Notional amount | $ 7,625
Fair Value Hedging | Floating-To-Fixed Interest Rate Contracts [Member] | Not Designated as Hedging Instrument |
Derivative [Line Items] |
Notional amount | 2,500
Cash Flow Hedging | Floating-To-Fixed Interest Rate Contracts [Member] | Designated as Hedging Instrument |
Derivative [Line Items] |
Notional amount | 250
Current Portion of Debt | Fixed-To-Variable Interest Rate Contracts [Member] |
Derivative [Line Items] |
Principal amount of hedged senior notes | 900
Long-term Debt | Fixed-To-Variable Interest Rate Contracts [Member] |
Derivative [Line Items] |
Principal amount of hedged senior notes | $ 6,725

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