Derivative Instruments and Hedging Activities (Schedule of Fair Value Hedging Instruments, Statements of Financial Performance and Financial Position, Location) (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Hedged asset, fair value hedge, cumulative increase (decrease)	$ 25
Available-for-sale securities
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Hedged asset, fair value hedge	4,989	$ 5,119
Hedged asset, fair value hedge, cumulative increase (decrease)	(189)	(14)
Closed portfolio and beneficial interest, last-of-layer, amortized cost	3,700	3,900
Amortized cost	1,700	1,600
Basis adjustment for active hedge	(141)	(6)
Hedged asset, last-of-layer, amount	1,100	1,200
Available-for-sale securities | Designated as hedging instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Basis adjustment for active hedge	25	14
Finance receivables and loans, net
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Hedged asset, fair value hedge	41,527	44,098
Hedged asset, fair value hedge, cumulative increase (decrease)	(658)	(37)
Basis adjustment for active hedge	(658)	(37)
Hedged asset, last-of-layer, amount	21,500	15,600
Closed portfolio, carrying value	41,200	43,500
Finance receivables and loans, net | Designated as hedging instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Basis adjustment for active hedge	(592)	(82)
Long-term debt
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Hedged liability, fair value hedge	7,048	7,213
Hedged liability, fair value hedge, cumulative increase (decrease)	105	110
Discontinued hedge | Available-for-sale securities
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Hedged asset, discontinued fair value hedge, cumulative increase (decrease)	(153)	(30)
Basis adjustment for active hedge	(116)	(20)
Discontinued hedge | Finance receivables and loans, net
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Hedged asset, discontinued fair value hedge, cumulative increase (decrease)	(66)	46
Basis adjustment for active hedge	66	46
Discontinued hedge | Long-term debt
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Hedged liability, discontinued fair value hedge, cumulative increase (decrease)	$ 107	$ 110