Quarterly report pursuant to Section 13 or 15(d)

OTHER COMPREHENSIVE INCOME - AOCI Roll Forward (Details)

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OTHER COMPREHENSIVE INCOME - AOCI Roll Forward (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Balance, beginning of period     $ 19,353  
Other comprehensive loss before reclassifications $ (87) $ (310) (343) $ 20
Net unrealized gains on net investment hedges 55 59 108 72
Period change (32) (251) (235) 92
Balance, end of period 19,515   19,515  
Unrealized gains and (losses) on debt securities        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Balance, beginning of period (2,222) (2,094) (2,094) (2,248)
Other comprehensive loss before reclassifications (72) (110) (202) 42
Net unrealized gains on net investment hedges 2 27 4 29
Period change (70) (83) (198) 71
Balance, end of period (2,292) (2,177) (2,292) (2,177)
Net change related to cash flow hedges on loans        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Balance, beginning of period (436) (443) (363) (632)
Other comprehensive loss before reclassifications (15) (201) (139) (23)
Net unrealized gains on net investment hedges 52 32 103 43
Period change 37 (169) (36) 20
Balance, end of period (399) (612) (399) (612)
Translation adjustments, net of hedges        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Balance, beginning of period (8) (8) (6) (8)
Other comprehensive loss before reclassifications 0 1 (2) 1
Net unrealized gains on net investment hedges 0 0 0 0
Period change 0 1 (2) 1
Balance, end of period (8) (7) (8) (7)
Unrealized gains (losses) for pension and other post-retirement obligations        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Balance, beginning of period (213) (210) (213) (210)
Other comprehensive loss before reclassifications 0 0 0 0
Net unrealized gains on net investment hedges 1 0 1 0
Period change 1 0 1 0
Balance, end of period (212) (210) (212) (210)
AOCI        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Balance, beginning of period (2,879) (2,755) (2,676) (3,098)
Balance, end of period $ (2,911) $ (3,006) (2,911) (3,006)
Reclassification out of Accumulated Other Comprehensive Income        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Net unrealized loss on securities transfer     $ 54 $ (62)