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Fair Value of Financial Instruments - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale securities $ 26,069 $ 27,221
Fair Value, Derivative Assets 382 165
Fair Value, Derivative Liabilities 234 148
Less: netting adjustment (Derivative Assets) (351) (137)
Less: netting adjustment (Derivative Liabilities) (223) (120)
U.S. Treasury securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale securities 16,135 15,850
U.S. agency debentures    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale securities 101 196
Foreign government debt securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale securities 1,088 61
Agency-issued MBS    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale securities 6,603 8,589
Agency-issued CMO    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale securities 678 982
Agency-issued CMBS    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale securities 1,464 1,543
Derivative    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Less: netting adjustment (Derivative Assets) (351) (137)
Less: netting adjustment (Derivative Liabilities) (223) (120)
Recurring    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale securities 26,069 27,221
Total assets 26,914 28,112
Total liabilities 337 126
Recurring | Other assets    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value, Derivative Assets 4  
Other assets   8
Recurring | Other liabilities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value, Derivative Liabilities 4  
Other liabilities   8
Recurring | Equity warrant assets | Other assets    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value, Derivative Assets 383 277
Recurring | Contingent conversion rights | Other assets    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value, Derivative Assets 12  
Recurring | Fair value accounting    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Nonmarketable securities 289 455
Recurring | U.S. Treasury securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale securities 16,135 15,850
Recurring | U.S. agency debentures    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale securities 101 196
Recurring | Foreign government debt securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale securities 1,088 61
Recurring | Agency-issued MBS    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale securities 6,603 8,589
Recurring | Agency-issued CMO    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale securities 678 982
Recurring | Agency-issued CMBS    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale securities 1,464 1,543
Recurring | Other equity securities in public companies | Fair value accounting    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Nonmarketable securities 32 117
Recurring | Derivative | Other assets    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value, Derivative Assets 157 151
Recurring | Derivative | Other liabilities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value, Derivative Liabilities 333 118
Recurring | Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale securities 17,223 15,911
Total assets 17,258 15,962
Total liabilities 4 8
Recurring | Level 1 | Other assets    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value, Derivative Assets 4  
Other assets   8
Recurring | Level 1 | Other liabilities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value, Derivative Liabilities 4  
Other liabilities   8
Recurring | Level 1 | Equity warrant assets | Other assets    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value, Derivative Assets 0 0
Recurring | Level 1 | Contingent conversion rights | Other assets    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value, Derivative Assets 0  
Recurring | Level 1 | Fair value accounting    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Nonmarketable securities 31 43
Recurring | Level 1 | U.S. Treasury securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale securities 16,135 15,850
Recurring | Level 1 | U.S. agency debentures    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale securities 0 0
Recurring | Level 1 | Foreign government debt securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale securities 1,088 61
Recurring | Level 1 | Agency-issued MBS    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale securities 0 0
Recurring | Level 1 | Agency-issued CMO    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale securities 0 0
Recurring | Level 1 | Agency-issued CMBS    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale securities 0 0
Recurring | Level 1 | Other equity securities in public companies | Fair value accounting    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Nonmarketable securities 31 43
Recurring | Level 1 | Derivative | Other assets    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value, Derivative Assets 0 0
Recurring | Level 1 | Derivative | Other liabilities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value, Derivative Liabilities 0 0
Recurring | Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale securities 8,846 11,310
Total assets 9,361 11,680
Total liabilities 556 238
Recurring | Level 2 | Other assets    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value, Derivative Assets 0  
Other assets   0
Recurring | Level 2 | Other liabilities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value, Derivative Liabilities 0  
Other liabilities   0
Recurring | Level 2 | Equity warrant assets | Other assets    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value, Derivative Assets 6 8
Recurring | Level 2 | Contingent conversion rights | Other assets    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value, Derivative Assets 0  
Recurring | Level 2 | Fair value accounting    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Nonmarketable securities 1 74
Recurring | Level 2 | U.S. Treasury securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale securities 0 0
Recurring | Level 2 | U.S. agency debentures    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale securities 101 196
Recurring | Level 2 | Foreign government debt securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale securities 0 0
Recurring | Level 2 | Agency-issued MBS    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale securities 6,603 8,589
Recurring | Level 2 | Agency-issued CMO    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale securities 678 982
Recurring | Level 2 | Agency-issued CMBS    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale securities 1,464 1,543
Recurring | Level 2 | Other equity securities in public companies | Fair value accounting    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Nonmarketable securities 1 74
Recurring | Level 2 | Derivative | Other assets    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value, Derivative Assets 508 288
Recurring | Level 2 | Derivative | Other liabilities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value, Derivative Liabilities 556 238
Recurring | Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale securities 0 0
Total assets 389 269
Total liabilities 0 0
Recurring | Level 3 | Other assets    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value, Derivative Assets 0  
Other assets   0
Recurring | Level 3 | Other liabilities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value, Derivative Liabilities 0  
Other liabilities   0
Recurring | Level 3 | Equity warrant assets | Other assets    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value, Derivative Assets 377 269
Recurring | Level 3 | Contingent conversion rights | Other assets    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value, Derivative Assets 12  
Recurring | Level 3 | Fair value accounting    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Nonmarketable securities 0 0
Recurring | Level 3 | U.S. Treasury securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale securities 0 0
Recurring | Level 3 | U.S. agency debentures    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale securities 0 0
Recurring | Level 3 | Foreign government debt securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale securities 0 0
Recurring | Level 3 | Agency-issued MBS    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale securities 0 0
Recurring | Level 3 | Agency-issued CMO    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale securities 0 0
Recurring | Level 3 | Agency-issued CMBS    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale securities 0 0
Recurring | Level 3 | Other equity securities in public companies | Fair value accounting    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Nonmarketable securities 0 0
Recurring | Level 3 | Derivative | Other assets    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value, Derivative Assets 0 0
Recurring | Level 3 | Derivative | Other liabilities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value, Derivative Liabilities 0 0
Recurring | Measured at net asset value | Venture capital and private equity fund investments measured at net asset value | Fair value accounting    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Nonmarketable securities $ 257 $ 338