Consolidated Statement of Changes in Equity (unaudited) - USD ($) $ in Millions	Total		Preferred stock	Common stock	Additional paid-in capital	Retained earnings	Accumulated other comprehensive (loss), net of tax	Treasury stock	Non-redeemable noncontrolling interests of consolidated investment management funds	Redeemable non- controlling interests/ temporary equity
Common stock issued under:
The Bank of New York Mellon Corporation shareholders’ equity				$ 37,096
Beginning balance at Dec. 31, 2018	$ 40,739	[1]	$ 3,542	14	$ 27,118	$ 28,652	$ (3,171)	$ (15,517)	$ 101	$ 129
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued to shareholders of noncontrolling interests										20
Redemption of subsidiary shares from noncontrolling interests										(7)
Other net changes in noncontrolling interests	30				19				11	(22)
Net income	956					946			10
Other comprehensive (loss) income attributable to The Bank of New York Mellon Corporation shareholders	271						271
Other comprehensive income (loss)	2									2
Dividends:
Common stock	(270)					(270)
Preferred stock	(36)					(36)
Repurchase of common stock	(555)							(555)
Common stock issued under:
Employee benefit plans	10				10
Direct stock purchase and dividend reinvestment plan	11				11
Stock awards and options exercised	191				191
Ending balance at Mar. 31, 2019	41,347	[1]	3,542	14	27,349	29,382	(2,990)	(16,072)	122	122
Common stock issued under:
The Bank of New York Mellon Corporation shareholders’ equity				37,683
The Bank of New York Mellon Corporation shareholders’ equity				37,578
Beginning balance at Sep. 30, 2019	41,323	[2]	3,542	14	27,471	30,789	(2,893)	(17,803)	203	147
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued to shareholders of noncontrolling interests										25
Redemption of subsidiary shares from noncontrolling interests										(41)
Other net changes in noncontrolling interests	(127)				(17)				(110)	8
Net income	1,449					1,440			9
Other comprehensive (loss) income attributable to The Bank of New York Mellon Corporation shareholders	255						255
Other comprehensive income (loss)	4									4
Dividends:
Common stock	(286)					(286)
Preferred stock	(49)					(49)
Repurchase of common stock	(1,041)							(1,041)
Common stock issued under:
Employee benefit plans	6				6
Stock awards and options exercised	55				55
Ending balance at Dec. 31, 2019	41,585	[2],[3]	3,542	14	27,515	31,894	(2,638)	(18,844)	102	143
Common stock issued under:
The Bank of New York Mellon Corporation shareholders’ equity	41,483			37,941
Shares issued to shareholders of noncontrolling interests										17
Redemption of subsidiary shares from noncontrolling interests										(16)
Other net changes in noncontrolling interests	5				(5)				10	(2)
Net income	962					980			(18)
Other comprehensive (loss) income attributable to The Bank of New York Mellon Corporation shareholders	(184)						(184)
Other comprehensive income (loss)	(2)									(2)
Common stock	(282)					(282)
Preferred stock	(36)					(36)
Repurchase of common stock	(985)							(985)
Employee benefit plans	9				9
Stock awards and options exercised	125				125
Ending balance at Mar. 31, 2020	41,239	[3]	$ 3,542	14	$ 27,644	$ 32,601	$ (2,827)	$ (19,829)	$ 94	$ 140
Common stock issued under:
The Bank of New York Mellon Corporation shareholders’ equity	$ 41,145			$ 37,603

[1] Includes total The Bank of New York Mellon Corporation common shareholders’ equity of $37,096 million at Dec. 31, 2018 and $37,683 million at March 31, 2019.

[2] Includes total The Bank of New York Mellon Corporation common shareholders’ equity of $37,578 million at Sept. 30, 2019 and $37,941 million at Dec. 31, 2019.

[3] Includes total The Bank of New York Mellon Corporation common shareholders’ equity of $37,941 million at Dec. 31, 2019 and $37,603 million at March 31, 2020.