Consolidated Comprehensive Income Statement (unaudited) - USD ($) $ in Millions		3 Months Ended			9 Months Ended
		Sep. 30, 2022	Jun. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Statement of Comprehensive Income [Abstract]
Net income (loss)		$ 388	$ 864	$ 943	$ 2,017	$ 2,902
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments		(442)	(555)	(202)	(1,150)	(301)
Unrealized (loss) on assets available-for-sale:
Unrealized (loss) arising during the period		(908)	(882)	(150)	(3,321)	(776)
Reclassification adjustment		(1)	0	(2)	(4)	(3)
Total unrealized (loss) on assets available-for-sale		(909)	(882)	(152)	(3,325)	(779)
Defined benefit plans:
Amortization of prior service credit, net loss and initial obligation included in net periodic benefit cost		13	13	22	44	69
Total defined benefit plans		13	13	22	44	69
Net unrealized (loss) on cash flow hedges		(1)	(5)	(1)	(8)	(7)
Total other comprehensive (loss), net of tax	[1]	(1,339)	(1,429)	(333)	(4,439)	(1,018)
Total comprehensive (loss) income		(951)	(565)	610	(2,422)	1,884
Net loss (income) attributable to noncontrolling interests		0	5	4	13	(6)
Other comprehensive loss attributable to noncontrolling interests		19	3	0	25	0
Comprehensive (loss) income applicable to shareholders of The Bank of New York Mellon Corporation		$ (932)	$ (557)	$ 614	$ (2,384)	$ 1,878

[1] Other comprehensive (loss) attributable to The Bank of New York Mellon Corporation shareholders was $(1,320) million for the quarter ended Sept. 30, 2022, $(1,426) million for the quarter ended June 30, 2022, $(333) million for the quarter ended Sept. 30, 2021, $(4,414) million for the nine months ended Sept. 30, 2022 and $(1,018) million for the nine months ended Sept. 30, 2021.