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, 2016	Mar. 31, 2015
Total operating revenues	$ 1,148.7	$ 1,291.6
Total operating expenses	874.3	953.5
Operating Income (Loss)	274.4	338.1
Equity in earnings of unconsolidated affiliates	(12.2)	11.8
Interest and dividend income	3.6	2.5
Other gains and losses, net	(4.7)	2.7
Other gains/(losses) of CIP, net	(24.6)	24.4
Income before income taxes	229.7	385.3
Income tax provision	(71.9)	(101.3)
Income from continuing operations, net of taxes	157.8	284.0
Net income	157.8	284.0
(Gains)/losses attributable to noncontrolling interests in consolidated entities, net	3.2	(24.4)
Net income attributable to Invesco Ltd	161.0	259.6
Impact of CIP [Member]
Total operating revenues	(5.5)	(9.3)
Total operating expenses	1.8	12.2
Operating Income (Loss)	(7.3)	(21.5)
Equity in earnings of unconsolidated affiliates	3.5	(1.7)
Interest and dividend income	(0.1)	(1.4)
Other gains and losses, net	(0.2)	(2.7)
Interest and dividend income of CIP	44.4	60.2
Interest expense of CIP	27.3	45.1
Other gains/(losses) of CIP, net	(24.6)	24.4
Income before income taxes	(11.6)	12.2
Income tax provision	0.0	0.0
Net income	(11.6)	12.2
(Gains)/losses attributable to noncontrolling interests in consolidated entities, net	3.2	(20.4)
Net income attributable to Invesco Ltd	$ (8.4)	$ (8.2)