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Derivatives (Estimated Fair Value of Derivative Assets and Liabilities after Master Netting Agreements and Cash Collateral) (Details) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Offsetting Assets [Line Items] |  |
Derivative Asset, Fair Value, Gross Asset Excluding Accruals | $ 11,577 | $ 10,596
Derivative Liability, Fair Value, Gross Liability Excluding Accruals | 6,975 | 3,829
Net amount of derivative assets after application of master netting agreements and cash collateral | 175 | 124
Net amount of derivative liabilities after application of master netting agreements and cash collateral | 25 | 121
Over the Counter [Member] |  |
Offsetting Assets [Line Items] |  |
Derivative Asset, Fair Value, Gross Asset Excluding Accruals | 11,438 | 10,132
Derivative Liability, Fair Value, Gross Liability Excluding Accruals | 6,628 | 3,798
Derivative Liability, Subject to Master Netting Arrangement, Deduction of Financial Instrument Not Offset | (4,579) | (2,204)
Derivative Asset, Subject to Master Netting Arrangement, Deduction of Financial Instrument Not Offset | (4,579) | (2,204)
Cash collateral on derivative assets | (5,432) | (6,948)
Cash collateral on derivative liabilities | 0 | 0
Securities collateral on derivative assets | (1,322) | (891)
Securities collateral on derivative liabilities | (2,024) | (1,473)
Exchange Traded [Member] |  |
Offsetting Assets [Line Items] |  |
Derivative Asset, Fair Value, Gross Asset Excluding Accruals | 18 | 16
Derivative Liability, Fair Value, Gross Liability Excluding Accruals | 5 | 7
Gross estimated fair value of derivative assets | 1 | 2
Gross estimated fair value of derivative liabilities | 1 | 2
Cash collateral on derivative assets | 0 | 0
Cash collateral on derivative liabilities | (3) | (3)
Securities collateral on derivative assets | 0 | 0
Securities collateral on derivative liabilities | (1) | (2)
Cleared [Member] |  |
Offsetting Assets [Line Items] |  |
Derivative Asset, Fair Value, Gross Asset Excluding Accruals | 121 | 448
Derivative Liability, Fair Value, Gross Liability Excluding Accruals | 342 | 24
Derivative Liability, Subject to Master Netting Arrangement, Deduction of Financial Instrument Not Offset | (33) | (6)
Derivative Asset, Subject to Master Netting Arrangement, Deduction of Financial Instrument Not Offset | (33) | (6)
Cash collateral on derivative assets | (35) | (421)
Cash collateral on derivative liabilities | (295) | (13)
Securities collateral on derivative assets | 0 | 0
Securities collateral on derivative liabilities | $ (14) | $ (5)

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