Related Party Transactions - Due to Affiliates (Detail) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Related Party Transactions [Abstract]
Due to affiliates of Consolidated Funds	$ 0.3	$ 0.6
Due to non-consolidated affiliates	51.7	37.1
Performance-based contingent cash and equity consideration related to acquisitions	35.3	43.6
Amounts owed under the tax receivable agreement	141.7	89.0
Other	16.9	13.9
Total	$ 245.9	$ 184.2