Components of Convertible Notes (Parenthetical) (Detail) - USD ($)	Sep. 27, 2015	Jun. 28, 2015
0.50% Notes due 2016
Debt Instrument [Line Items]
Principal amount of convertible debt conversion increments	$ 1,000	$ 1,000
Stock price per share	$ 73.74
1.25% Notes due 2018
Debt Instrument [Line Items]
Principal amount of convertible debt conversion increments	$ 1,000	1,000
Stock price per share	$ 73.74
2.625% Notes due 2041
Debt Instrument [Line Items]
Principal amount of convertible debt conversion increments	$ 1,000	$ 1,000
Stock price per share	$ 73.74