Consolidated Investment Products (CIP) - Condensed Consolidating Statement Of Income Line Items Reflecting Impact Of Consolidation Of Investment Products Into The Condensed Consolidated Statements Of Income (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Segment Reporting, Other Significant Reconciling Items [Line Items]
Total operating expenses	$ 1,301.9	$ 1,421.1	$ 2,583.8	$ 2,435.5
Operating income	117.1	18.3	434.1	218.5
Equity in earnings of unconsolidated affiliates	11.2	12.1	28.1	27.1
Interest and dividend income	2.4	3.9	8.8	8.6
Other gains and losses, net	60.0	24.1	(46.5)	55.2
Other gains/(losses) of CIP, net	(50.5)	51.1	(70.6)	90.0
Income before income taxes	105.4	76.5	282.8	333.3
Income tax provision	(43.4)	(14.5)	(100.8)	(80.7)
Net income	62.0	62.0	182.0	252.6
Net (income)/loss attributable to noncontrolling interests in consolidated entities	37.7	(21.9)	58.4	(34.8)
Net income attributable to Invesco Ltd.	40.5	40.1	122.0	217.8
Consolidated
Segment Reporting, Other Significant Reconciling Items [Line Items]
Total operating revenues	(10.5)	(7.2)	(19.4)	(15.9)
Total operating expenses	1.5	5.4	18.5	8.2
Operating income	(12.0)	(12.6)	(37.9)	(24.1)
Equity in earnings of unconsolidated affiliates	53.4	(5.7)	36.8	0.9
Interest and dividend income	(0.1)	(1.0)	(0.3)	(2.4)
Other gains and losses, net	(28.6)	(8.3)	13.4	(29.0)
Interest and dividend income of CIP	79.7	86.7	164.9	171.4
Interest expense of CIP	(52.5)	(54.8)	(109.4)	(112.8)
Other gains/(losses) of CIP, net	(77.7)	19.2	(126.1)	31.4
Income before income taxes	(37.8)	23.5	(58.6)	35.4
Income tax provision	0.0	0.0	0.0	0.0
Net income	(37.8)	23.5	(58.6)	35.4
Net (income)/loss attributable to noncontrolling interests in consolidated entities	37.7	(21.9)	58.4	(34.8)
Net income attributable to Invesco Ltd.	$ (0.1)	$ 1.6	$ (0.2)	$ 0.6