v3.26.1
Other comprehensive income (loss) - Changes in AOCI (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Balance at beginning of period     $ 44,721  
Net change [1] $ 41 $ 572 (421) $ 1,116
Balance at end of period [2] 45,264 44,428 45,264 44,428
Foreign currency translation        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Balance at beginning of period (1,538) (1,827) (1,451) (2,031)
Net change (40) 425 (127) 629
Balance at end of period (1,578) (1,402) (1,578) (1,402)
Accumulated Defined Benefits Adjustment | Pension Plan        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Balance at beginning of period (1,282) (1,337) (1,295) (1,344)
Net change 10 5 23 12
Balance at end of period (1,272) (1,332) (1,272) (1,332)
Accumulated Defined Benefits Adjustment | Other post-retirement benefits        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Balance at beginning of period (34) (42) (35) (36)
Net change 0 1 1 (5)
Balance at end of period (34) (41) (34) (41)
Unrealized gain (loss) on assets available-for-sale        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Balance at beginning of period (610) (907) (241) (1,240)
Net change 65 139 (304) 472
Balance at end of period (545) (768) (545) (768)
AOCI, Accumulated Gain (Loss), Debt Securities, Available-For-Sale Securities Transferred To Held-To-Maturity, After Consideration Of Hedge And Taxes        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Net change (11) (7)    
Unrealized gain (loss) on cash flow hedges        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Balance at beginning of period (32) (2) (13) (5)
Net change 6 (4) (13) (1)
Balance at end of period (26) (6) (26) (6)
Total accumulated other comprehensive income (loss), net of tax        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Balance at beginning of period (3,496) (4,115) (3,035) (4,656)
Net change 41 566 (420) 1,107
Balance at end of period $ (3,455) $ (3,549) $ (3,455) $ (3,549)
[1] Other comprehensive income (loss) attributable to The Bank of New York Mellon Corporation shareholders was $41 million for the quarter ended June 30, 2026, $566 million for the quarter ended June 30, 2025, $(420) million for the six months ended June 30, 2026 and $1,107 million for the six months ended June 30, 2025.
[2] Includes total The Bank of New York Mellon Corporation common shareholders’ equity of $39,910 million at June 30, 2026 and $38,619 million at June 30, 2025.