Annual report pursuant to Section 13 and 15(d)

OTHER COMPREHENSIVE INCOME - AOCI Roll Forward (Details)

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OTHER COMPREHENSIVE INCOME - AOCI Roll Forward (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
AOCI Attributable to Parent, Net of Tax [Roll Forward]      
Beginning balance $ 19,297    
Other comprehensive income before reclassifications (2,961) $ (475) $ 417
Amounts reclassified from accumulated OCI to earnings 92 54 31
Period change (2,869) (421) 448
Ending balance 17,731 19,297  
Transferred from AFS to HTM (66) (27) (53)
AOCI attributable to parent      
AOCI Attributable to Parent, Net of Tax [Roll Forward]      
Beginning balance (229) 192 (256)
Ending balance (3,098) (229) 192
Unrealized gains and (losses) on securities | Debt securities      
AOCI Attributable to Parent, Net of Tax [Roll Forward]      
Beginning balance (153) 188 (28)
Other comprehensive income before reclassifications (2,926) (367) 183
Amounts reclassified from accumulated OCI to earnings 77 26 33
Period change (2,849) (341) 216
Ending balance (3,002) (153) 188
Net impact of hedges on available-for-sale securities | Debt securities      
AOCI Attributable to Parent, Net of Tax [Roll Forward]      
Beginning balance 89 2 0
Other comprehensive income before reclassifications 665 87 2
Amounts reclassified from accumulated OCI to earnings 0 0 0
Period change 665 87 2
Ending balance 754 89 2
Change in fair value of cash flow hedges on loans      
AOCI Attributable to Parent, Net of Tax [Roll Forward]      
Beginning balance 63 255 23
Other comprehensive income before reclassifications (695) (192) 232
Amounts reclassified from accumulated OCI to earnings 0 0 0
Period change (695) (192) 232
Ending balance (632) 63 255
Translation adjustments, net of hedges      
AOCI Attributable to Parent, Net of Tax [Roll Forward]      
Beginning balance (3) 0 0
Other comprehensive income before reclassifications (5) (3) 0
Amounts reclassified from accumulated OCI to earnings 0 0 0
Period change (5) (3) 0
Ending balance (8) (3) 0
Unrealized (losses) gains for pension and other post-retirement obligations      
AOCI Attributable to Parent, Net of Tax [Roll Forward]      
Beginning balance (225) (253) (251)
Other comprehensive income before reclassifications 0 0 0
Amounts reclassified from accumulated OCI to earnings 15 28 (2)
Period change 15 28 (2)
Ending balance $ (210) $ (225) $ (253)