Equity (Detail) (USD $)	0 Months Ended	3 Months Ended	12 Months Ended
Feb. 03, 2014	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
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)		$ 70.34	$ 49.67

Amount of a stock repurchase plan authorized by an entity's Board of Directors.

No definition available.

Name:	us-gaap_StockRepurchaseProgramAuthorizedAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration