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	Redeemable Noncontrolling Interests in Consolidated Entities Temporary Equity
Beginning balance at Dec. 31, 2018	$ 8,936.2		$ 98.1	$ 6,334.8	$ (3,003.6)	$ 5,884.5	$ (735.0)	$ 8,578.8	$ 357.4
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	171.6					177.7		177.7	(6.1)
Other comprehensive income/(loss)	61.4						61.4	61.4
Change in noncontrolling interests in consolidated entities, net	(11.2)								(11.2)
Dividends - common	(120.1)					(120.1)		(120.1)
Common share-based compensation	49.8			49.8				49.8
Vested common shares				(110.8)	110.8
Other common share awards	0.3			(0.1)	0.4			0.3
Purchase of common shares	(78.6)				(78.6)			(78.6)
Ending balance at Mar. 31, 2019	9,009.4		98.1	6,273.7	(2,971.0)	5,942.1	(673.6)	8,669.3	340.1
Beginning balance at Dec. 31, 2018										$ 396.2
Increase (Decrease) in Temporary Equity [Roll Forward]
Net income										19.0
Change in noncontrolling interests in consolidated entities, net										35.9
Ending balance at Mar. 31, 2019										451.1
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	165.1					140.7		140.7	24.4
Other comprehensive income/(loss)	(318.2)						(318.2)	(318.2)
Change in noncontrolling interests in consolidated entities, net	(37.1)								(37.1)
Dividends - preferred	(59.2)					(59.2)		(59.2)
Dividends - common	(142.7)					(142.7)		(142.7)
Common share-based compensation	47.4			47.4				47.4
Vested common shares	0.0			(160.4)	160.4			0.0
Other common share awards	0.3			(0.1)	0.4			0.3
Purchase of common shares	(31.5)				(31.5)			(31.5)
Ending balance at Mar. 31, 2020	13,942.4	$ 4,010.5	$ 113.2	$ 7,747.7	$ (3,323.2)	$ 5,856.6	$ (905.5)	$ 13,499.3	$ 443.1
Beginning balance at Dec. 31, 2019	383.5									383.5
Increase (Decrease) in Temporary Equity [Roll Forward]
Net income										(45.1)
Change in noncontrolling interests in consolidated entities, net										(161.9)
Ending balance at Mar. 31, 2020	$ 176.5									$ 176.5