Borrowed Funds (Remaining Maturity) (Details) - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024
Debt Disclosure [Abstract]
Less than 1 year	$ 16,933
1 to 2 years	9,765
2 to 3 years	7,665
3 to 4 years	2,431
4 to 5 years	6,421
Over 5 years	17,507
Total borrowed funds	$ 60,722	$ 61,673

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Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the next rolling twelve months following the latest balance sheet. For interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing after the fifth rolling twelve months following the latest balance sheet. For interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the fifth rolling twelve months following the latest balance sheet. For interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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