Contingent Consideration - Changes in Contingent Consideration Liabilities (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Business Acquisition, Contingent Consideration [Line Items]
Balance, beginning of period	$ 323.5	$ 339.4	$ 350.3	$ 340.5
Change in carrying value	20.3	8.6	66.2	17.5
Payments	(1.0)	(0.9)	(73.7)	(10.9)
Balance, end of period	342.8	347.1	342.8	347.1
Carlyle Consolidated [Member] | Performance-Based [Member] | Contingent Cash Consideration [Member]
Business Acquisition, Contingent Consideration [Line Items]
Balance, beginning of period	101.2	137.6	152.2	158.6
Change in carrying value	(0.7)	4.2	18.8	(7.5)
Payments			(70.5)	(9.3)
Balance, end of period	100.5	141.8	100.5	141.8
Carlyle Consolidated [Member] | Performance-Based [Member] | Contingent Equity Consideration [Member]
Business Acquisition, Contingent Consideration [Line Items]
Balance, beginning of period	26.3	65.7	15.7	57.6
Change in carrying value	(0.1)	(8.8)	10.5	(0.7)
Balance, end of period	26.2	56.9	26.2	56.9
Carlyle Consolidated [Member] | Employment-Based [Member] | Contingent Cash Consideration [Member]
Business Acquisition, Contingent Consideration [Line Items]
Balance, beginning of period	161.8	106.9	148.7	96.2
Change in carrying value	22.5	11.1	35.6	21.8
Balance, end of period	184.3	118.0	184.3	118.0
Non-Carlyle Personnel [Member]
Business Acquisition, Contingent Consideration [Line Items]
Balance, beginning of period	34.2	29.2	33.7	28.1
Change in carrying value	(1.4)	2.1	1.3	3.9
Payments	(1.0)	(0.9)	(3.2)	(1.6)
Balance, end of period	$ 31.8	$ 30.4	$ 31.8	$ 30.4