Unsecured Borrowings - Unsecured Long-Term Borrowings by Maturity Date (Detail) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Total	$ 247,138	$ 254,092
Amount related to interest rate hedges on certain unsecured long-term borrowings	(15,010)
2024	(539)
2025	(1,250)
2026	(800)
2027	(1,550)
2028 - thereafter	(10,870)
Group Inc.
Debt Instrument [Line Items]
Total	185,973	208,796
Subsidiaries
Debt Instrument [Line Items]
Total	61,165	$ 45,296
Unsecured Debt
Debt Instrument [Line Items]
2024	51,011
2025	37,142
2026	22,202
2027	30,360
2028 - thereafter	106,423
Total	247,138
Unsecured Debt \| Group Inc.
Debt Instrument [Line Items]
2024	34,130
2025	26,690
2026	17,662
2027	21,835
2028 - thereafter	85,655
Total	185,972
Unsecured Debt \| Subsidiaries
Debt Instrument [Line Items]
2024	16,881
2025	10,452
2026	4,540
2027	8,525
2028 - thereafter	20,768
Total	$ 61,166

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