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, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Segment Reporting, Other Significant Reconciling Items [Line Items]
Total operating expenses	$ 1,250.5	$ 1,301.9	$ 2,565.9	$ 2,583.8
Operating income	470.9	117.1	815.2	434.1
Equity in earnings of unconsolidated affiliates	37.2	11.2	64.7	28.1
Interest and dividend income	0.4	2.4	1.7	8.8
Other gains and losses, net	43.4	60.0	77.5	(46.5)
Other gains/(losses) of CIP, net	122.0	(50.5)	216.7	(70.6)
Income before income taxes	649.3	105.4	1,127.4	282.8
Income tax provision	(154.2)	(43.4)	(260.7)	(100.8)
Net income	495.1	62.0	866.7	182.0
Net (income)/loss attributable to noncontrolling interests in consolidated entities	(67.6)	37.7	(112.2)	58.4
Net income attributable to Invesco Ltd.	368.3	40.5	636.1	122.0
Consolidated
Segment Reporting, Other Significant Reconciling Items [Line Items]
Total operating revenues	(10.2)	(10.5)	(20.3)	(19.4)
Total operating expenses	9.0	1.5	15.9	18.5
Operating income	(19.2)	(12.0)	(36.2)	(37.9)
Equity in earnings of unconsolidated affiliates	(27.2)	53.4	(61.5)	36.8
Interest and dividend income	0.0	(0.1)	0.0	(0.3)
Other gains and losses, net	(8.0)	(28.6)	(6.8)	13.4
Interest and dividend income of CIP	66.5	79.7	135.2	164.9
Interest expense of CIP	(38.4)	(52.5)	(79.3)	(109.4)
Other gains/(losses) of CIP, net	93.9	(77.7)	160.8	(126.1)
Income before income taxes	67.6	(37.8)	112.2	(58.6)
Income tax provision	0.0	0.0	0.0	0.0
Net income	67.6	(37.8)	112.2	(58.6)
Net (income)/loss attributable to noncontrolling interests in consolidated entities	(67.6)	37.7	(112.2)	58.4
Net income attributable to Invesco Ltd.	$ 0.0	$ (0.1)	$ 0.0	$ (0.2)