Stockholders' Equity - Additional Information (Detail) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended		12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Sep. 30, 2007
Equity [Abstract]
Repurchase authorization, shares	0	0	10,000,000
Shares remaining available for repurchase under the current authorization	1,600,000
Cash dividends paid to common stockholders	$ 13	$ 13
Cash dividends per share paid to common stockholders	$ 0.20	$ 0.20