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
	Mar. 31, 2021	Mar. 31, 2020
Segment Reporting, Other Significant Reconciling Items [Line Items]
Total operating expenses	$ 1,315.4	$ 1,281.9
Operating income	344.3	317.0
Equity in earnings of unconsolidated affiliates	27.5	16.9
Interest and dividend income	1.3	6.4
Other gains and losses, net	34.1	(106.5)
Other gains/(losses) of CIP, net	94.7	(20.1)
Income before income taxes	478.1	177.4
Income tax provision	(106.5)	(57.4)
Net income	371.6	120.0
Net (income)/loss attributable to noncontrolling interests in consolidated entities	(44.6)	20.7
Net income attributable to Invesco Ltd.	267.8	81.5
Consolidated
Segment Reporting, Other Significant Reconciling Items [Line Items]
Total operating revenues	(10.1)	(8.9)
Total operating expenses	6.9	17.0
Operating income	(17.0)	(25.9)
Equity in earnings of unconsolidated affiliates	(34.3)	(16.6)
Interest and dividend income	0.0	(0.1)
Other gains and losses, net	1.2	41.8
Interest and dividend income of CIP	68.7	85.2
Interest expense of CIP	(40.9)	(56.9)
Other gains/(losses) of CIP, net	66.9	(48.4)
Income before income taxes	44.6	(20.8)
Income tax provision	0.0	0.0
Net income	44.6	(20.8)
Net (income)/loss attributable to noncontrolling interests in consolidated entities	(44.6)	20.7
Net income attributable to Invesco Ltd.	$ 0.0	$ (0.1)