Contingent Consideration - Changes in Contingent Consideration Liabilities (Detail) - USD ($) $ in Millions		6 Months Ended		12 Months Ended
	Jul. 01, 2015	Dec. 31, 2015	Jun. 30, 2015	Dec. 31, 2015	Dec. 31, 2014
Loss Contingency Accrual [Roll Forward]
Beginning balance			$ 384.6	$ 384.6	$ 350.3
Contingent consideration from new acquisition / investments					0.0
Change in carrying value				(45.9)	148.8
Payments				(25.9)	(99.1)
Issuances of equity				(2.2)	(15.4)
Ending balance		$ 310.6		310.6	384.6
Decrease in contingent consideration payable		46.3
Barclays Natural Resource Investments
Loss Contingency Accrual [Roll Forward]
Accrued contingent consideration obligation		183.0		$ 183.0
Vermillion
Loss Contingency Accrual [Roll Forward]
Percentage of economic interest			55.00%	55.00%
Revised ownership interest percentage	83.00%
Amounts payable to the sellers who are Carlyle professionals | Performance-based | Contingent equity consideration
Loss Contingency Accrual [Roll Forward]
Beginning balance			$ 0.0	$ 0.0	15.7
Contingent consideration from new acquisition / investments					0.0
Change in carrying value				0.0	(2.9)
Payments				0.0	0.0
Issuances of equity				0.0	(12.8)
Ending balance		0.0		0.0	0.0
Amounts payable to the sellers who are Carlyle professionals | Performance-based | Contingent cash consideration
Loss Contingency Accrual [Roll Forward]
Beginning balance			26.8	26.8	145.1
Contingent consideration from new acquisition / investments					0.0
Change in carrying value				2.1	(27.6)
Payments				(20.2)	(90.7)
Issuances of equity				0.0	0.0
Ending balance		8.7		8.7	26.8
Amounts payable to the sellers who are Carlyle professionals | Employment-based contingent cash consideration | Contingent cash consideration
Loss Contingency Accrual [Roll Forward]
Beginning balance			156.8	156.8	148.7
Contingent consideration from new acquisition / investments					0.0
Change in carrying value				(70.9)	10.1
Payments				(3.3)	(1.2)
Issuances of equity				(2.2)	(0.8)
Ending balance		80.4		80.4	156.8
Contingent cash and other consideration payable to non- Carlyle personnel
Loss Contingency Accrual [Roll Forward]
Beginning balance			$ 201.0	201.0	40.8
Contingent consideration from new acquisition / investments					0.0
Change in carrying value				22.9	169.2
Payments				(2.4)	(7.2)
Issuances of equity				0.0	(1.8)
Ending balance		221.5		221.5	$ 201.0
Contingent Consideration | Barclays Natural Resource Investments
Loss Contingency Accrual [Roll Forward]
Accrued contingent consideration obligation		$ 23.2		$ 23.2