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	$ 0.0	$ 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	228.0					217.8		217.8	10.2
Other comprehensive income/(loss)	63.6						63.6	63.6
Change in noncontrolling interests in consolidated entities, net	(2.6)								(2.6)
Issuance of Shares	5,463.8	4,010.5	15.1	1,438.2		0.0		5,463.8
Dividends declared - common	(245.5)					(245.5)		(245.5)
Common share-based compensation	109.4			109.4				109.4
Vested common shares	88.7			(71.5)	160.2			88.7
Other common share awards	0.6			(0.1)	0.7			0.6
Purchase of common shares	(342.5)				(342.5)			(342.5)
Ending balance at Jun. 30, 2019	14,299.7	4,010.5	113.2	7,810.8	(3,185.2)	5,856.8	(671.4)	13,934.7	365.0
Beginning balance at Dec. 31, 2018										$ 396.2
Increase (Decrease) in Temporary Equity [Roll Forward]
Net income										24.6
Change in noncontrolling interests in consolidated entities, net										(24.4)
Ending balance at Jun. 30, 2019										396.4
Beginning 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
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	56.4					40.1		40.1	16.3
Other comprehensive income/(loss)	2.2						2.2	2.2
Change in noncontrolling interests in consolidated entities, net	8.6								8.6
Issuance of Shares	5,463.8		15.1	1,438.2				5,463.8
Dividends declared - common	(125.4)					(125.4)		(125.4)
Common share-based compensation	59.6			59.6				59.6
Vested common shares	88.7			39.3	49.4			88.7
Other common share awards	0.3			0.0	0.3			0.3
Purchase of common shares	(263.9)				(263.9)			(263.9)
Ending balance at Jun. 30, 2019	14,299.7	4,010.5	113.2	7,810.8	(3,185.2)	5,856.8	(671.4)	13,934.7	365.0
Beginning balance at Mar. 31, 2019										451.1
Increase (Decrease) in Temporary Equity [Roll Forward]
Net income										5.6
Change in noncontrolling interests in consolidated entities, net										(60.3)
Ending balance at Jun. 30, 2019										396.4
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	204.4					240.4		240.4	(36.0)
Other comprehensive income/(loss)	(228.7)						(228.7)	(228.7)
Change in noncontrolling interests in consolidated entities, net	(54.1)								(54.1)
Issuance of Shares		4,010.5
Dividends - preferred	(118.4)					(118.4)		(118.4)
Dividends declared - common	(214.8)					(214.8)		(214.8)
Common share-based compensation	95.2			95.2				95.2
Vested common shares	0.0			(167.0)	167.0			0.0
Other common share awards	0.7			(0.6)	1.3			0.7
Purchase of common shares	(34.9)				(34.9)			(34.9)
Ending 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
Beginning balance at Dec. 31, 2019	383.5									383.5
Increase (Decrease) in Temporary Equity [Roll Forward]
Net income										(22.4)
Change in noncontrolling interests in consolidated entities, net										(158.3)
Ending balance at Jun. 30, 2020	202.8									202.8
Beginning 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
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	39.3					99.7		99.7	(60.4)
Other comprehensive income/(loss)	89.5						89.5	89.5
Change in noncontrolling interests in consolidated entities, net	(17.0)								(17.0)
Dividends - preferred	(59.2)					(59.2)		(59.2)
Dividends declared - common	(72.1)					(72.1)		(72.1)
Common share-based compensation	47.8			47.8				47.8
Vested common shares	0.0			(6.6)	6.6			0.0
Other common share awards	0.4			(0.5)	0.9			0.4
Purchase of common shares	(3.4)				(3.4)			(3.4)
Ending 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
Beginning balance at Mar. 31, 2020										176.5
Increase (Decrease) in Temporary Equity [Roll Forward]
Net income										22.7
Change in noncontrolling interests in consolidated entities, net										3.6
Ending balance at Jun. 30, 2020	$ 202.8									$ 202.8