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Derivative Instruments and Hedging Activities (Fair Value Amounts of Derivative Instruments Reported on our Condensed Consolidated Balance Sheet) (Details) - USD ($) $ in Millions | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Derivatives, Fair Value [Line Items] |  |
receivable position | $ 12 | $ 33
payable position | 11 | 17
Notional amount | 40,064 | 44,468
Credit derivative, maximum exposure, undiscounted | 24 | 29
Total derivatives designated as accounting hedges |  |
Derivatives, Fair Value [Line Items] |  |
receivable position | 9 | 31
payable position | 0 | 6
Notional amount | 38,800 | 42,251
Total derivatives not designated as accounting hedges |  |
Derivatives, Fair Value [Line Items] |  |
receivable position | 3 | 2
payable position | 11 | 11
Notional amount | 1,264 | 2,217
Interest rate contracts | Total derivatives not designated as accounting hedges |  |
Derivatives, Fair Value [Line Items] |  |
receivable position | 2 | 2
payable position | 0 | 0
Notional amount | 1,207 | 2,158
Swaps | Total derivatives designated as accounting hedges |  |
Derivatives, Fair Value [Line Items] |  |
receivable position | 0 | 0
payable position | 0 | 0
Notional amount | 32,390 | 35,835
Swaps | Total derivatives not designated as accounting hedges |  |
Derivatives, Fair Value [Line Items] |  |
receivable position | 0 | 0
payable position | 0 | 0
Notional amount | 1,000 | 2,000
Purchased options | Total derivatives designated as accounting hedges |  |
Derivatives, Fair Value [Line Items] |  |
receivable position | 9 | 31
payable position | 0 | 0
Notional amount | 6,250 | 6,250
Forwards | Total derivatives not designated as accounting hedges |  |
Derivatives, Fair Value [Line Items] |  |
receivable position | 0 | 0
payable position | 0 | 0
Notional amount | 92 | 70
Written options | Total derivatives not designated as accounting hedges |  |
Derivatives, Fair Value [Line Items] |  |
receivable position | 2 | 2
payable position | 0 | 0
Notional amount | 115 | 88
Foreign exchange contracts | Total derivatives not designated as accounting hedges |  |
Derivatives, Fair Value [Line Items] |  |
receivable position | 0 | 0
payable position | 0 | 1
Notional amount | 57 | 59
Forwards | Total derivatives designated as accounting hedges |  |
Derivatives, Fair Value [Line Items] |  |
receivable position | 0 | 0
payable position | 0 | 6
Notional amount | 160 | 166
Forwards | Total derivatives not designated as accounting hedges |  |
Derivatives, Fair Value [Line Items] |  |
receivable position | 0 | 0
payable position | 0 | 1
Notional amount | 57 | 59
Other credit derivatives | Total derivatives not designated as accounting hedges |  |
Derivatives, Fair Value [Line Items] |  |
receivable position | 0 | 0
payable position | 10 | 10
Equity contracts | Total derivatives not designated as accounting hedges |  |
Derivatives, Fair Value [Line Items] |  |
receivable position | 1 | 0
payable position | 1 | 0
Notional amount | 0 | 0
Written options | Total derivatives not designated as accounting hedges |  |
Derivatives, Fair Value [Line Items] |  |
receivable position | 0 | 0
payable position | 1 | 0
Notional amount | 0 | 0
Purchased options | Total derivatives not designated as accounting hedges |  |
Derivatives, Fair Value [Line Items] |  |
receivable position | 1 | 0
payable position | 0 | 0
Notional amount | $ 0 | $ 0

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