Derivative Instruments and Hedging Activities(Schedule of Terminated Cash Flows) (Details) - Accumulated Net Gain (Loss) from Derivative Instruments Designated as Cash Flow Hedges [Member] - USD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2021 |
Dec. 31, 2020 |
|
| Accumulated Other Comprehensive Income (Loss) [Line Items] | ||
| Accumulated Other Comprehensive Income related to discontinued cash flow hedges, before tax | $ 121 | $ 78 |
| Other Comprehensive Income (loss), Unrealized Gain (loss) on discontinued cash flow hedges arising during the period, before tax | 739 | 55 |
| Other Comprehensive Income (loss), Reclassification Adjustment from AOCI on discontinued cash flow hedges, before tax | (160) | (12) |
| Accumulated Other Comprehensive Income related to discontinued cash flow hedges, before tax | $ 700 | $ 121 |