Accounts Receivable - Additional Information (Detail) (USD $)	6 Months Ended
	Jun. 30, 2014	Feb. 03, 2014	Dec. 31, 2013
Receivables [Abstract]
Securitized accounts receivable facility	$ 500,000,000		$ 500,000,000
Maximum undivided ownership interest pooled accounts receivable amount sold	500,000,000
Deferred financing fees		500,000
Short-term debt outstanding	$ 424,400,000		$ 349,000,000