Stockholders' Equity - Additional Information (Detail) (USD $) Share data in Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Stockholders Equity Note [Line Items]
Preference stock, maximum shares authorized to be issued	20.0
Preference stock, par value	$ 0.01
Preference stock, shares outstanding	0
Preferred stock, maximum shares authorized to be issued	3.0
Preferred stock, par value	$ 1.00
Preferred stock, shares outstanding	0
Shares of common stock repurchased	2.3	20.4	18.6
Purchase of treasury stock	$ 77,946,000	$ 536,318,000	$ 446,704,000
Authorized increase to share repurchase program		500,000,000	500,000,000
Remaining share repurchase authorizations under share repurchase program	349,400,000
Dividends paid per share of common stock	$ 1.24	$ 0.92	$ 0.83
Currency translation adjustments	$ 27,616,000	$ (77,105,000)	$ 883,000