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		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Total operating revenues	$ 1,201.6	$ 1,273.5	$ 3,539.7	$ 3,883.2
Total operating expenses	895.3	920.8	2,657.5	2,828.4
Operating Income (Loss)	306.3	352.7	882.2	1,054.8
Equity in earnings of unconsolidated affiliates	5.5	8.2	(2.1)	32.0
Interest and dividend income	2.6	2.4	8.7	7.5
Other gains and losses, net	16.2	0.9	7.3	(5.2)
Other gains/(losses) of CIP, net	39.0	1.5	69.4	39.1
Income before income taxes	345.7	341.7	895.6	1,080.4
Income tax provision	(89.8)	(100.4)	(245.4)	(311.1)
Net income	255.9	241.3	650.2	769.3
(Gains)/losses attributable to noncontrolling interests in consolidated entities, net	(14.7)	8.0	(22.5)	(3.1)
Net income attributable to Invesco Ltd	241.2	249.3	627.7	766.2
Impact of CIP [Member]
Total operating revenues	(5.7)	(9.5)	(16.3)	(29.2)
Total operating expenses	7.4	8.7	17.1	22.4
Operating Income (Loss)	(13.1)	(18.2)	(33.4)	(51.6)
Equity in earnings of unconsolidated affiliates	(5.2)	0.2	(6.8)	(1.0)
Interest and dividend income	0.0	(1.5)	(0.2)	(3.7)
Other gains and losses, net	(2.8)	0.0	(3.7)	(3.9)
Interest and dividend income of CIP	50.1	64.7	140.7	190.0
Interest expense of CIP	(28.8)	(45.9)	(89.4)	(138.3)
Other gains/(losses) of CIP, net	17.7	(17.3)	18.1	(12.6)
Income before income taxes	17.9	(18.0)	25.3	(21.1)
Income tax provision	0.0	0.0	0.0	0.0
Net income	17.9	(18.0)	25.3	(21.1)
(Gains)/losses attributable to noncontrolling interests in consolidated entities, net	(14.7)	4.8	(22.5)	0.1
Net income attributable to Invesco Ltd	$ 3.2	$ (13.2)	$ 2.8	$ (21.0)