Debt - ABS Financing Facilities (Details) $ in Millions	1 Months Ended			3 Months Ended		6 Months Ended
	Apr. 30, 2023 USD ($)	Mar. 31, 2023 USD ($)	Dec. 31, 2021 agreement	Jun. 30, 2023 USD ($)	Mar. 31, 2023 USD ($)	Jun. 30, 2023 USD ($)
Debt Instrument [Line Items]
Repayments of debt				$ 810	$ 1,040	$ 1,850
2021 ABS Financing Facility
Debt Instrument [Line Items]
Number of loan agreements | agreement			2
Amount drawn from credit facilities		$ 325
Repayments of debt	$ 700
Debt outstanding				7,600		7,600
2022 ABS Financing Facility | Secured Debt
Debt Instrument [Line Items]
Amount drawn from credit facilities		$ 500
Debt outstanding				$ 2,500		$ 2,500