Components of Convertible Notes (Phantom) (Detail)	Mar. 27, 2016 USD ($) $ / shares
0.50% Notes due 2016
Debt Instrument [Line Items]
Principal amount of convertible debt conversion increments | $	$ 1,000
Stock price per share | $ / shares	$ 72.41
1.25% Notes due 2018
Debt Instrument [Line Items]
Principal amount of convertible debt conversion increments | $	$ 1,000
Stock price per share | $ / shares	$ 72.41
2.625% Notes due 2041
Debt Instrument [Line Items]
Principal amount of convertible debt conversion increments | $	$ 1,000
Stock price per share | $ / shares	$ 72.41