Equity-Based Compensation - RSU Activity (Detail) (USD $) In Millions, except Share data, unless otherwise specified	0 Months Ended	3 Months Ended
	Mar. 26, 2014	Mar. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average grant date fair value forfeited		$ 8.00
Options Outstanding, Beginning Balance		2,950,003
Options Outstanding, Ending Balance		1,487,503
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award Accelerated Compensation Cost	$ 17.5
Share-based Compensation Arrangement by Share-based Payment Award, Accelerated Vesting, Number	625,000
Unvested outstanding, beginning balance		8,777,286
Unvested Shares, Granted		1,252,798	[1]
Unvested Shares, Forfeited	(625,000)	(797,983)	[1]
Unvested Shares, Vested		(1,040,353)
Unvested outstanding, ending balance		8,191,748
Weighted average grant date fair value, beginning		$ 14.32
Weighted average grant date fair value granted		$ 26.34	[1]
Weighted average grant date fair value forfeited		$ 9.75	[1]
Weighted average grant date fair value delivered		$ 15.56
Weighted Average Grant Date Fair Value Vested		$ 20.84
Weighted average grant date fair value, ending		$ 15.78
Options Outstanding, Beginning Balance		22,793,751
Vested Shares, Delivered		(2,524,047)
Options Outstanding, Ending Balance		21,310,057
Total number of RSUs outstanding, beginning		31,571,037
Number of RSUs outstanding granted		1,252,798	[1]
Number of RSUs outstanding forfeited		(797,983)	[1]
Number of RSUs outstanding delivered		(2,524,047)
Total number of RSUs outstanding, ending		29,501,805	[2]

[1] In connection with the departure of an employee from the Company, 625,000 RSUs previously granted to such employee vested immediately and 625,000

[2] Amount excludes RSUs which have vested and have been issued in the form of Class A shares.