Hedging Activities and Fair Value Measurements, Other Fair Value Measurements (Details) - USD ($) $ in Billions |
Mar. 31, 2022 |
Dec. 31, 2021 |
---|---|---|
Carrying Value [Member] | ||
Financial Liabilities: [Abstract] | ||
Fixed Rate Debt Principal Amount Fair Value Disclosure | $ 28.2 | $ 29.6 |
Level 2 [Member] | Fair Value [Member] | ||
Financial Liabilities: [Abstract] | ||
Fixed Rate Debt Principal Amount Fair Value Disclosure | $ 28.9 | $ 33.5 |