Consolidated Investment Products (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, 2018	Mar. 31, 2017
Total operating revenues	$ 1,355.8	$ 1,192.6
Total operating expenses	1,034.7	934.7
Operating Income (Loss)	321.1	257.9
Equity in earnings of unconsolidated affiliates	9.7	17.7
Interest and dividend income	4.2	2.9
Other gains and losses, net	(5.4)	6.9
Other gains/(losses) of CIP, net	27.2	28.5
Income before income taxes	333.6	289.9
Income tax provision	(68.4)	(75.7)
Net income	265.2	214.2
(Gains)/losses attributable to noncontrolling interests in consolidated entities, net	(11.3)	(2.2)
Net income attributable to Invesco Ltd	253.9	212.0
Impact of CIP [Member]
Total operating revenues	(7.0)	(13.2)
Total operating expenses	3.2	(1.2)
Operating Income (Loss)	(10.2)	(12.0)
Equity in earnings of unconsolidated affiliates	(4.2)	1.5
Other gains and losses, net	(0.9)	(10.1)
Interest and dividend income of CIP	57.8	53.8
Interest expense of CIP	(39.4)	(36.2)
Other gains/(losses) of CIP, net	8.8	10.9
Income before income taxes	11.9	7.9
Income tax provision	0.0	0.0
Net income	11.9	7.9
(Gains)/losses attributable to noncontrolling interests in consolidated entities, net	(11.3)	(2.2)
Net income attributable to Invesco Ltd	$ 0.6	$ 5.7