Consolidated Sponsored Investment Products (Balances Related To CSIP) (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Schedule of Investments [Abstract]
Investments of CSIP		$ 290.3
Cash and cash equivalents of CSIP		21.9
Accounts receivable and other assets of CSIP		6.9
Assets of consolidated sponsored investment products	$ 0.0	319.1
Other liabilities of CSIP		(4.4)
Redeemable Noncontrolling Interest, Consolidated Sponsored Investment Products [Line Items]		(167.3)
Equity attributable to nonredeemable noncontrolling interests		(40.8)
Invesco's net interests in CSIP		$ 106.6