v3.26.1
Derivative Instruments and Hedging Activities - Schedule of Fair Value Hedging Instruments, Statements of Financial Performance and Financial Position, Location (Details) - USD ($)
$ in Millions
Mar. 31, 2026
Dec. 31, 2025
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Hedged liability, fair value hedge $ 3,395 $ 3,378
Hedged Liability, Statement of Financial Position [Extensible Enumeration] Long-term debt Long-term debt
Available-for-sale securities    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Hedged asset, fair value hedge $ 14,968 $ 15,240
Hedged asset, fair value hedge, cumulative increase (decrease) $ (68) $ 7
Hedged Asset, Statement of Financial Position [Extensible Enumeration] Available-for-sale securities (amortized cost basis of $25,974 and $25,825) Available-for-sale securities (amortized cost basis of $25,974 and $25,825)
Closed portfolio and beneficial interest, last-of-layer, amortized cost $ 13,500 $ 13,700
Amortized cost 13,200 13,400
Cumulative basis adjustment for active hedges, asset (liability) (72) (8)
Hedged asset, last-of-layer, amount 11,000 11,000
Available-for-sale securities | Total derivatives designated as accounting hedges    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Cumulative basis adjustment for active hedges, asset (liability) (21) 46
Finance receivables and loans, net    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Hedged asset, fair value hedge 23,942 27,808
Hedged asset, fair value hedge, cumulative increase (decrease) $ (23) $ 7
Hedged Asset, Statement of Financial Position [Extensible Enumeration] Finance receivables and loans, net Finance receivables and loans, net
Cumulative basis adjustment for active hedges, asset (liability) $ (23) $ 7
Hedged asset, last-of-layer, amount 10,000 10,800
Closed portfolio, carrying value 19,100 21,800
Finance receivables and loans, net | Total derivatives designated as accounting hedges    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Cumulative basis adjustment for active hedges, asset (liability) (24) 6
Long-term debt    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Hedged liability, fair value hedge, cumulative increase (decrease) 76 79
Discontinued hedge | Available-for-sale securities    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Hedged asset, discontinued fair value hedge, cumulative increase (decrease) (51) (54)
Cumulative basis adjustment for active hedges, asset (liability) (51) (54)
Discontinued hedge | Finance receivables and loans, net    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Hedged asset, discontinued fair value hedge, cumulative increase (decrease) 1 1
Cumulative basis adjustment for active hedges, asset (liability) 1 1
Discontinued hedge | Long-term debt    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Hedged liability, discontinued fair value hedge, cumulative increase (decrease) $ 76 $ 79