Changes in Shareholder's Equity - Additional Information (Detail) (USD $) In Millions, except Per Share data, unless otherwise specified	1 Months Ended	3 Months Ended
	Jun. 30, 2007	Mar. 30, 2014	Mar. 31, 2013
Shareholders Equity [Line Items]
Repurchase of outstanding common stock, authorized amount	$ 300
Per share market price of common stock		$ 61.32
Strike price of warrants		$ 74.65	$ 74.65
Conversion of convertible notes, shares issued upon conversion		1.6	0.3
Stock Option
Shareholders Equity [Line Items]
Weighted average antidilutive which were not included in the calculation of earnings per share		6.5	7.8
Convertible Note
Shareholders Equity [Line Items]
Weighted average antidilutive which were not included in the calculation of earnings per share		2.5	1.4