Equity (Detail) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Feb. 04, 2014	Feb. 03, 2014
Stockholders' Equity Note [Abstract]
Stock repurchase program, authorized amount					$ 800,000,000.0	$ 500,000,000.0
Treasury stock, average price paid per share (in Dollars per share)	$ 69.59	$ 57.17	$ 70.07	$ 53.19