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		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Segment Reporting, Other Significant Reconciling Items [Line Items]
Total operating expenses	$ 1,286.2	$ 1,229.1	$ 3,852.1	$ 3,812.9
Operating income	463.8	268.5	1,279.0	702.6
Equity in earnings of unconsolidated affiliates	54.6	18.6	119.3	46.7
Interest and dividend income	1.9	2.6	3.6	11.4
Other gains and losses, net	(12.1)	31.5	65.4	(15.0)
Other gains/(losses) of CIP, net	200.2	99.2	416.9	28.6
Income before income taxes	685.3	386.6	1,812.7	669.4
Income tax provision	(139.7)	(91.9)	(400.4)	(192.7)
Net income	545.6	294.7	1,412.3	476.7
Net (income)/loss attributable to noncontrolling interests in consolidated entities	(156.3)	(43.8)	(268.5)	14.6
Net income attributable to Invesco Ltd.	330.1	191.7	966.2	313.7
Consolidated
Segment Reporting, Other Significant Reconciling Items [Line Items]
Total operating revenues	(11.2)	(10.4)	(31.4)	(29.8)
Total operating expenses	9.5	4.4	25.4	22.9
Operating income	(20.7)	(14.8)	(56.8)	(52.7)
Equity in earnings of unconsolidated affiliates	(25.0)	(26.0)	(86.5)	10.8
Interest and dividend income	0.0	0.0	0.0	(0.3)
Other gains and losses, net	1.8	(5.0)	(5.1)	8.4
Interest and dividend income of CIP	79.2	76.3	214.4	241.2
Interest expense of CIP	(41.5)	(41.8)	(120.8)	(151.2)
Other gains/(losses) of CIP, net	162.5	64.7	323.3	(61.4)
Income before income taxes	156.3	53.4	268.5	(5.2)
Income tax provision	0.0	0.0	0.0	0.0
Net income	156.3	53.4	268.5	(5.2)
Net (income)/loss attributable to noncontrolling interests in consolidated entities	(156.3)	(43.8)	(268.5)	14.6
Net income attributable to Invesco Ltd.	$ 0.0	$ 9.6	$ 0.0	$ 9.4