Commitments and Contingencies - Schedule of Fair Value, Off-balance Sheet Risks (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Financing assets (excluding leases)
Other Commitments [Line Items]
Credit related commitments	$ 21,807	$ 13,011
Standby letters of credit
Other Commitments [Line Items]
Credit related commitments	325	92
Other letters of credit
Other Commitments [Line Items]
Credit related commitments	41	24
Deferred purchase agreements
Other Commitments [Line Items]
Credit related commitments	2,097	0
Lessor commitments
Other Commitments [Line Items]
Credit related commitments	$ 513	$ 0