ACQUISITION OF KAPSTREAM (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
	Jul. 01, 2015	Sep. 30, 2015	Jun. 30, 2015	Sep. 30, 2015	Dec. 31, 2014
Assets:
Goodwill		$ 592.4		$ 592.4	$ 509.7
Liabilities:
Foreign currency translation loss		(7.5)		(7.5)
Kapstream
Acquisition of Kapstream
Ownership interest acquired (as a percent)	51.00%
Ownership interest that the Company has an option to purchase	49.00%
Initial upfront cash consideration	$ 84.1
Issuance	$ 6.0	5.6		5.6
Contingent consideration payable period, low	18 months
Contingent consideration payable period, high end	36 months
Fair value of contingent consideration	$ 6.0	5.6		$ 5.6
Assets:
Cash and cash equivalents	7.3
Investment securities	4.4
Accounts receivable	4.6
Intangible assets	114.7
Goodwill	90.1
Other current assets	3.1
Other non-current assets, net	0.1
Liabilities:
Contingent consideration	(6.0)
Deferred income taxes	(34.4)
Other accrued liabilities	(10.2)
Noncontrolling interests	(85.7)
Net assets acquired	88.0
Kapstream | Other comprehensive loss
Liabilities:
Foreign currency translation loss		$ 7.5
Kapstream | General Administrative and Occupancy Expense
Acquisition of Kapstream
Bank advisory fees and other deal costs			$ 2.1
Kapstream | Distribution rights
Acquisition of Kapstream
Initial upfront cash consideration	$ 3.9
Kapstream | Client relationships
Liabilities:
Estimated useful life	10 years
Amortization period	10 years