Supplemental Condensed Consolidating Guarantor and Non-Guarantor Financial Information - Condensed Consolidating Balance Sheet (Parenthetical) (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013
Condensed Financial Statements, Captions [Line Items]
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	5,000	5,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	5,000	5,000
Common stock, shares issued	4,839.1	4,838.8
Common stock, shares outstanding	4,839.1	4,838.8
Put Options [Member]
Condensed Financial Statements, Captions [Line Items]
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	5,000	5,000
Common stock, shares issued	160.9	161.2
Common stock, shares outstanding	160.9	161.2