Condensed Consolidated Statements of Changes in Equity (Unaudited) - USD ($) $ in Millions	Total	Preferred Shares	Common Shares	Additional Paid-in-Capital	Treasury Shares	Retained Earnings	Accumulated Other Comprehensive Income/(Loss)	Total Equity Attributable to Invesco Ltd.	Nonredeemable Noncontrolling Interests in Consolidated Entities
Beginning balance at Dec. 31, 2019	$ 14,318.3	$ 4,010.5	$ 113.2	$ 7,860.8	$ (3,452.5)	$ 5,917.8	$ (587.3)	$ 13,862.5	$ 455.8
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	487.9					491.3		491.3	(3.4)
Other comprehensive income/(loss)	(60.6)						(60.6)	(60.6)
Change in noncontrolling interests in consolidated entities, net	(35.8)								(35.8)
Dividends declared - preferred	(177.6)					(177.6)		(177.6)
Dividends declared - common	(287.0)					(287.0)		(287.0)
Common share-based compensation	138.2			138.2				138.2
Vested common shares				(200.3)	200.3
Other common share awards	7.9			(10.1)	18.0			7.9
Purchase of common shares	(40.7)				(40.7)			(40.7)
Ending balance at Sep. 30, 2020	14,350.6	4,010.5	113.2	7,788.6	(3,274.9)	5,944.5	(647.9)	13,934.0	416.6
Beginning balance at Dec. 31, 2019	383.5
Increase (Decrease) in Temporary Equity [Roll Forward]
Net income	(11.2)
Change in noncontrolling interests in consolidated entities, net	(144.1)
Ending balance at Sep. 30, 2020	228.2
Beginning balance at Jun. 30, 2020	13,967.7	4,010.5	113.2	7,788.4	(3,319.1)	5,825.0	(816.0)	13,602.0	365.7
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	283.5					250.9		250.9	32.6
Other comprehensive income/(loss)	168.1						168.1	168.1
Change in noncontrolling interests in consolidated entities, net	18.3								18.3
Dividends declared - preferred	(59.2)					(59.2)		(59.2)
Dividends declared - common	(72.2)					(72.2)		(72.2)
Common share-based compensation	43.0			43.0				43.0
Vested common shares				(33.3)	33.3
Other common share awards	7.2			(9.5)	16.7			7.2
Purchase of common shares	(5.8)				(5.8)			(5.8)
Ending balance at Sep. 30, 2020	14,350.6	4,010.5	113.2	7,788.6	(3,274.9)	5,944.5	(647.9)	13,934.0	416.6
Beginning balance at Jun. 30, 2020	202.8
Increase (Decrease) in Temporary Equity [Roll Forward]
Net income	11.2
Change in noncontrolling interests in consolidated entities, net	14.2
Ending balance at Sep. 30, 2020	228.2
Beginning balance at Dec. 31, 2020	14,808.9	4,010.5	113.2	7,811.4	(3,253.8)	6,085.0	(404.5)	14,361.8	447.1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,374.2					1,143.8		1,143.8	230.4
Other comprehensive income/(loss)	(72.8)						(72.8)	(72.8)
Change in noncontrolling interests in consolidated entities, net	(25.6)								(25.6)
Dividends declared - preferred	(177.6)					(177.6)		(177.6)
Dividends declared - common	(230.0)					(230.0)		(230.0)
Common share-based compensation	106.0			106.0				106.0
Vested common shares	(0.1)			(256.2)	256.1			(0.1)
Other common share awards	7.1			(1.1)	8.2			7.1
Purchase of common shares	(58.1)				(58.1)			(58.1)
Ending balance at Sep. 30, 2021	15,732.0	4,010.5	113.2	7,660.1	(3,047.6)	6,821.2	(477.3)	15,080.1	651.9
Beginning balance at Dec. 31, 2020	211.8
Increase (Decrease) in Temporary Equity [Roll Forward]
Net income	38.1
Change in noncontrolling interests in consolidated entities, net	292.7
Ending balance at Sep. 30, 2021	542.6
Beginning balance at Jun. 30, 2021	15,426.6	4,010.5	113.2	7,664.3	(3,080.3)	6,570.1	(369.8)	14,908.0	518.6
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	525.1					389.3		389.3	135.8
Other comprehensive income/(loss)	(107.5)						(107.5)	(107.5)
Change in noncontrolling interests in consolidated entities, net	(2.5)								(2.5)
Dividends declared - preferred	(59.2)					(59.2)		(59.2)
Dividends declared - common	(79.0)					(79.0)		(79.0)
Common share-based compensation	33.2			33.2				33.2
Vested common shares	(0.1)			(36.3)	36.2			(0.1)
Other common share awards	5.9			(1.1)	7.0			5.9
Purchase of common shares	(10.5)				(10.5)			(10.5)
Ending balance at Sep. 30, 2021	15,732.0	$ 4,010.5	$ 113.2	$ 7,660.1	$ (3,047.6)	$ 6,821.2	$ (477.3)	$ 15,080.1	$ 651.9
Beginning balance at Jun. 30, 2021	363.9
Increase (Decrease) in Temporary Equity [Roll Forward]
Net income	20.5
Change in noncontrolling interests in consolidated entities, net	158.2
Ending balance at Sep. 30, 2021	$ 542.6