Equity-Based Compensation - Schedule of Equity-Based Compensation Expense Recognized in Consolidated Financial Statements (Parenthetical) (Detail) (Maximum [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation expenses	$ 1