Derivative Instruments and Hedging Activities (Schedule of Fair Value Hedging Instruments, Statements of Financial Performance and Financial Position, Location) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Hedged asset, fair value hedge, cumulative increase (decrease)	$ 15
Hedged liability, fair value hedge, cumulative increase (decrease)	(12)
Available-for-sale securities
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Hedged asset, fair value hedge	11,265	$ 5,119
Hedged asset, fair value hedge, cumulative increase (decrease)	(180)	(14)
Closed portfolio and beneficial interest, last-of-layer, amortized cost	10,000	3,900
Amortized cost	9,700	1,600
Basis adjustment for active hedge	(135)	(6)
Hedged asset, last-of-layer, amount	4,000	1,200
Available-for-sale securities | Designated as hedging instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Basis adjustment for active hedge	3	14
Finance receivables and loans, net
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Hedged asset, fair value hedge	46,390	44,098
Hedged asset, fair value hedge, cumulative increase (decrease)	(617)	(37)
Basis adjustment for active hedge	(617)	(37)
Hedged asset, last-of-layer, amount	22,800	15,600
Closed portfolio, carrying value	46,100	43,500
Finance receivables and loans, net | Designated as hedging instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Basis adjustment for active hedge	(560)	(82)
Long-term debt
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Hedged liability, fair value hedge	7,697	7,213
Hedged liability, fair value hedge, cumulative increase (decrease)	112	110
Discontinued hedge | Available-for-sale securities
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Hedged asset, discontinued fair value hedge, cumulative increase (decrease)	(181)	(30)
Basis adjustment for active hedge	(138)	(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)	(57)	46
Basis adjustment for active hedge	(57)	46
Discontinued hedge | Long-term debt
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Hedged liability, discontinued fair value hedge, cumulative increase (decrease)	$ 120	$ 110