Unsecured Borrowings - Unsecured Long-Term Borrowings by Maturity Date (Detail) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Total	$ 239,965	$ 254,092
Amount related to interest rate hedges on certain unsecured long-term borrowings	(15,250)
2023	(9)
2024	(513)
2025	(1,260)
2026	(801)
2027	(1,660)
2028 - thereafter	(11,010)
Unsecured Debt
Debt Instrument [Line Items]
2023	14,609
2024	40,828
2025	34,203
2026	20,824
2027	27,937
2028 - thereafter	101,564
Total	$ 239,965

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Amount Related To Interest Rate Hedges On Certain Unsecured Long Term Borrowings Maturing In Year One

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