Consolidated Comprehensive Income Statement (unaudited) - USD ($) $ in Millions		3 Months Ended			6 Months Ended
		Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Statement of Comprehensive Income [Abstract]
Net income (loss)		$ 864	$ 765	$ 1,027	$ 1,629	$ 1,959
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments		(555)	(153)	51	(708)	(99)
Unrealized (loss) gain on assets available-for-sale:
Unrealized (loss) gain arising during the period		(882)	(1,531)	77	(2,413)	(626)
Reclassification adjustment		0	(3)	(1)	(3)	(1)
Total unrealized (loss) gain on assets available-for-sale		(882)	(1,534)	76	(2,416)	(627)
Defined benefit plans:
Amortization of prior service credit, net loss and initial obligation included in net periodic benefit cost		13	18	25	31	47
Total defined benefit plans		13	18	25	31	47
Net unrealized (loss) on cash flow hedges		(5)	(2)	(3)	(7)	(6)
Total other comprehensive (loss), net of tax	[1]	(1,429)	(1,671)	149	(3,100)	(685)
Total comprehensive (loss) income		(565)	(906)	1,176	(1,471)	1,274
Net loss (income) attributable to noncontrolling interests		5	8	(5)	13	(10)
Other comprehensive loss (gain) attributable to noncontrolling interests		3	3	0	6	0
Comprehensive (loss) income applicable to shareholders of The Bank of New York Mellon Corporation		$ (557)	$ (895)	$ 1,171	$ (1,452)	$ 1,264

[1] Other comprehensive (loss) income attributable to The Bank of New York Mellon Corporation shareholders was $(1,426) million for the quarter ended June 30, 2022, $(1,668) million for the quarter ended March 31, 2022, $149 million for the quarter ended June 30, 2021, $(3,094) million for the six months ended June 30, 2022 and $(685) million for the six months ended June 30, 2021.