Financial Instruments - Fair Value of Derivative Instruments (Detail) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Foreign exchange contracts
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount	$ 1,160	$ 1,655
Interest rate caps
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount	14,219	11,900
Interest rate caps | Subsidiary Issuers
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount	6,200	3,000
Interest rate swaps
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount	1,450	1,450
Interest rate caps sold
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount	9,800	7,200
Purchase
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount	$ 4,400	$ 4,700