v3.26.1
Fair Value - Schedule of Fair Value Measurements - Recurring Basis (Details) - USD ($)
$ in Millions
Mar. 31, 2026
Dec. 31, 2025
Assets    
Equity securities $ 863 $ 876
Total available-for-sale securities $ 23,038 $ 22,973
Derivative Asset, Statement of Financial Position [Extensible Enumeration] Finance receivables and loans, net  
Liabilities    
Investment in any one industry did not exceed percentage 15.00% 11.00%
Carrying amount, equity investments without a readily determinable fair value $ 112 $ 111
Fair value, measurements, recurring    
Assets    
Total available-for-sale securities 23,038 22,973
Total assets, net amount 3  
Total assets 23,845 23,792
Liabilities    
Total derivative contracts in a payable position 3 4
Total liabilities 3 4
Fair value, measurements, recurring | Interest rate    
Liabilities    
Total derivative contracts in a payable position 1  
Fair value, measurements, recurring | Foreign exchange    
Liabilities    
Total derivative contracts in a payable position   4
Fair value, measurements, recurring | Credit    
Liabilities    
Total derivative contracts in a payable position 1  
Fair value, measurements, recurring | Equity    
Liabilities    
Total derivative contracts in a payable position 1  
Fair value, measurements, recurring | Equity securities    
Assets    
Equity securities 804 819
Liabilities    
Carrying amount, equity investments without a readily determinable fair value 59 57
Fair value, measurements, recurring | U.S. Treasury and federal agencies    
Assets    
Total available-for-sale securities 2,397 2,279
Fair value, measurements, recurring | U.S. States and political subdivisions    
Assets    
Total available-for-sale securities 517 551
Fair value, measurements, recurring | Foreign government    
Assets    
Total available-for-sale securities 199 188
Fair value, measurements, recurring | Agency mortgage-backed residential    
Assets    
Total available-for-sale securities 12,695 12,901
Fair value, measurements, recurring | Mortgage-backed residential    
Assets    
Total available-for-sale securities 193 198
Fair value, measurements, recurring | Agency mortgage-backed commercial    
Assets    
Total available-for-sale securities 5,107 4,932
Fair value, measurements, recurring | Asset-backed    
Assets    
Total available-for-sale securities 2 12
Fair value, measurements, recurring | Corporate debt    
Assets    
Total available-for-sale securities 1,928 1,912
Fair value, measurements, recurring | Interest rate    
Assets    
Total assets, net amount 1  
Fair value, measurements, recurring | Foreign exchange    
Assets    
Total assets, net amount 2  
Fair value, measurements, recurring | Level 1    
Assets    
Total available-for-sale securities 2,429 2,310
Total assets, net amount 0  
Total assets 3,233 3,129
Liabilities    
Total derivative contracts in a payable position 1 0
Total liabilities 1 0
Fair value, measurements, recurring | Level 1 | Interest rate    
Liabilities    
Total derivative contracts in a payable position 0  
Fair value, measurements, recurring | Level 1 | Foreign exchange    
Liabilities    
Total derivative contracts in a payable position   0
Fair value, measurements, recurring | Level 1 | Credit    
Liabilities    
Total derivative contracts in a payable position 0  
Fair value, measurements, recurring | Level 1 | Equity    
Liabilities    
Total derivative contracts in a payable position 1  
Fair value, measurements, recurring | Level 1 | Equity securities    
Assets    
Equity securities 804 819
Fair value, measurements, recurring | Level 1 | U.S. Treasury and federal agencies    
Assets    
Total available-for-sale securities 2,397 2,279
Fair value, measurements, recurring | Level 1 | U.S. States and political subdivisions    
Assets    
Total available-for-sale securities 0 0
Fair value, measurements, recurring | Level 1 | Foreign government    
Assets    
Total available-for-sale securities 32 31
Fair value, measurements, recurring | Level 1 | Agency mortgage-backed residential    
Assets    
Total available-for-sale securities 0 0
Fair value, measurements, recurring | Level 1 | Mortgage-backed residential    
Assets    
Total available-for-sale securities 0 0
Fair value, measurements, recurring | Level 1 | Agency mortgage-backed commercial    
Assets    
Total available-for-sale securities 0 0
Fair value, measurements, recurring | Level 1 | Asset-backed    
Assets    
Total available-for-sale securities 0 0
Fair value, measurements, recurring | Level 1 | Corporate debt    
Assets    
Total available-for-sale securities 0 0
Fair value, measurements, recurring | Level 1 | Interest rate    
Assets    
Total assets, net amount 0  
Fair value, measurements, recurring | Level 1 | Foreign exchange    
Assets    
Total assets, net amount 0  
Fair value, measurements, recurring | Level 2    
Assets    
Total available-for-sale securities 20,575 20,629
Total assets, net amount 3  
Total assets 20,578 20,629
Liabilities    
Total derivative contracts in a payable position 1 4
Total liabilities 1 4
Fair value, measurements, recurring | Level 2 | Interest rate    
Liabilities    
Total derivative contracts in a payable position 1  
Fair value, measurements, recurring | Level 2 | Foreign exchange    
Liabilities    
Total derivative contracts in a payable position   4
Fair value, measurements, recurring | Level 2 | Credit    
Liabilities    
Total derivative contracts in a payable position 0  
Fair value, measurements, recurring | Level 2 | Equity    
Liabilities    
Total derivative contracts in a payable position 0  
Fair value, measurements, recurring | Level 2 | Equity securities    
Assets    
Equity securities 0 0
Fair value, measurements, recurring | Level 2 | U.S. Treasury and federal agencies    
Assets    
Total available-for-sale securities 0 0
Fair value, measurements, recurring | Level 2 | U.S. States and political subdivisions    
Assets    
Total available-for-sale securities 483 517
Fair value, measurements, recurring | Level 2 | Foreign government    
Assets    
Total available-for-sale securities 167 157
Fair value, measurements, recurring | Level 2 | Agency mortgage-backed residential    
Assets    
Total available-for-sale securities 12,695 12,901
Fair value, measurements, recurring | Level 2 | Mortgage-backed residential    
Assets    
Total available-for-sale securities 193 198
Fair value, measurements, recurring | Level 2 | Agency mortgage-backed commercial    
Assets    
Total available-for-sale securities 5,107 4,932
Fair value, measurements, recurring | Level 2 | Asset-backed    
Assets    
Total available-for-sale securities 2 12
Fair value, measurements, recurring | Level 2 | Corporate debt    
Assets    
Total available-for-sale securities 1,928 1,912
Fair value, measurements, recurring | Level 2 | Interest rate    
Assets    
Total assets, net amount 1  
Fair value, measurements, recurring | Level 2 | Foreign exchange    
Assets    
Total assets, net amount 2  
Fair value, measurements, recurring | Level 3    
Assets    
Total available-for-sale securities 34 34
Total assets, net amount 0  
Total assets 34 34
Liabilities    
Total derivative contracts in a payable position 1 0
Total liabilities 1 0
Fair value, measurements, recurring | Level 3 | Interest rate    
Liabilities    
Total derivative contracts in a payable position 0  
Fair value, measurements, recurring | Level 3 | Foreign exchange    
Liabilities    
Total derivative contracts in a payable position   0
Fair value, measurements, recurring | Level 3 | Credit    
Liabilities    
Total derivative contracts in a payable position 1  
Fair value, measurements, recurring | Level 3 | Equity    
Liabilities    
Total derivative contracts in a payable position 0  
Fair value, measurements, recurring | Level 3 | Equity securities    
Assets    
Equity securities 0 0
Fair value, measurements, recurring | Level 3 | U.S. Treasury and federal agencies    
Assets    
Total available-for-sale securities 0 0
Fair value, measurements, recurring | Level 3 | U.S. States and political subdivisions    
Assets    
Total available-for-sale securities 34 34
Fair value, measurements, recurring | Level 3 | Foreign government    
Assets    
Total available-for-sale securities 0 0
Fair value, measurements, recurring | Level 3 | Agency mortgage-backed residential    
Assets    
Total available-for-sale securities 0 0
Fair value, measurements, recurring | Level 3 | Mortgage-backed residential    
Assets    
Total available-for-sale securities 0 0
Fair value, measurements, recurring | Level 3 | Agency mortgage-backed commercial    
Assets    
Total available-for-sale securities 0 0
Fair value, measurements, recurring | Level 3 | Asset-backed    
Assets    
Total available-for-sale securities 0 0
Fair value, measurements, recurring | Level 3 | Corporate debt    
Assets    
Total available-for-sale securities 0 $ 0
Fair value, measurements, recurring | Level 3 | Interest rate    
Assets    
Total assets, net amount 0  
Fair value, measurements, recurring | Level 3 | Foreign exchange    
Assets    
Total assets, net amount $ 0