Consolidated Investment Products (Income Line Items Reflecting Impact Of Investment Products Into The Statements Of Income) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Variable Interest Entity [Line Items]
Total operating expenses	$ 5,225.2	$ 5,309.2	$ 4,109.2
Operating income	(920.4)	(808.2)	(1,204.9)
Equity in earnings of unconsolidated affiliates	(72.7)	(56.4)	(33.8)
Interest expense	(129.3)	(135.7)	(111.5)
Other gains and losses, net	(44.9)	(65.7)	40.0
Other gains/(losses) of CIP, net	139.9	149.8	29.6
Income before income taxes	1,069.1	972.9	1,138.1
Income tax provision	(261.6)	(235.1)	(255.0)
Net income	807.5	737.8	883.1
Net (income)/loss attributable to noncontrolling interests in consolidated entities	(45.9)	(49.5)	(0.3)
Net income attributable to Invesco Ltd.	524.8	564.7	882.8
Consolidated VIEs
Variable Interest Entity [Line Items]
Total operating revenues	(39.8)	(33.5)	(28.6)
Total operating expenses	22.2	28.1	16.2
Operating income	(62.0)	(61.6)	(44.8)
Equity in earnings of unconsolidated affiliates	(12.0)	5.1	(10.2)
Interest expense	(0.3)	(4.6)	0.0
Other gains and losses, net	10.3	40.8	(34.5)
Interest and dividend income of CIP	302.3	345.4	275.4
Interest expense of CIP	(194.5)	(228.5)	(190.7)
Other gains/(losses) of CIP, net	32.1	32.9	(55.1)
Income before income taxes	55.3	47.9	9.1
Income tax provision	0.0	0.0	0.0
Net income	55.3	47.9	9.1
Net (income)/loss attributable to noncontrolling interests in consolidated entities	(45.9)	(49.5)	(0.3)
Net income attributable to Invesco Ltd.	$ 9.4	$ (1.6)	$ 8.8