Debt Instruments Principal Amounts Associated With Interest Rates (Detail) (USD $) In Millions, unless otherwise specified	Jun. 29, 2013
Debt Instrument [Line Items]
Debt instrument aggregate principal amount	$ 17,000
Floating-rate notes, due 2016
Debt Instrument [Line Items]
Debt instrument, senior notes	1,000
Debt instrument effective interest rate	0.51%
Floating-rate notes, due 2018
Debt Instrument [Line Items]
Debt instrument, senior notes	2,000
Debt instrument effective interest rate	1.10%
Fixed-rate 0.45% notes due 2016
Debt Instrument [Line Items]
Debt instrument, senior notes	1,500
Debt instrument effective interest rate	0.51%
Fixed-rate 1.00% notes due 2018
Debt Instrument [Line Items]
Debt instrument, senior notes	4,000
Debt instrument effective interest rate	1.08%
Fixed-rate 2.40% notes due 2023
Debt Instrument [Line Items]
Debt instrument, senior notes	5,500
Debt instrument effective interest rate	2.44%
Fixed-rate 3.85% notes due 2043
Debt Instrument [Line Items]
Debt instrument, senior notes	$ 3,000
Debt instrument effective interest rate	3.91%