Stock-Based Compensation - Stock Option Activity (Detail) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Jan. 02, 2015	Oct. 03, 2014
Stock Option Activity [Abstract]
Options outstanding, Beginning Balance, Numbers of Shares	10.0	10.1
Granted, Number of Shares		1.2
Exercised, Number of Shares	(1.1)	(1.3)
Options Canceled or Expired In Period	(0.1)
Options outstanding, Ending Balance, Numbers of Shares	8.8	10.0
Exercisable at January 2, 2015	4.0
Vested and expected to vest after January 2, 2015	8.6
Options outstanding, Beginning Balance, Weighted Average Exercise Price Per Share	$ 45.16	$ 37.03
Granted, Weighted Average Exercise Price Per Share		$ 100.06
Exercised, Weighted Average Exercise Price Per Share	$ 32.14	$ 31.04
Canceled or expired, Weighted Average Exercise Price Per Share	$ 32.53
Options outstanding, Ending Balance, Weighted Average Exercise Price Per Share	$ 47.01	$ 45.16
Exercisable at January 2, 2015, Weighted Average Exercise Price Per Share	$ 32.98
Vested and expected to vest after January 2, 2015, Weighted Average Exercise Price Per Share	$ 46.41
Options outstanding at January 2, 2015, Weighted Average Remaining Contractual Life (in years)	4 years 5 months 9 days
Exercisable at January 2, 2015, Weighted Average Remaining Contractual Life (in years)	3 years 0 months 22 days
Vested and expected to vest after January 2, 2015, Weighted Average Remaining Contractual Life (in years)	4 years 4 months 28 days
Options outstanding at January 2, 2015, Aggregate Intrinsic Value	$ 564
Exercisable at January 2, 2015, Aggregate Intrinsic Value	314
Vested and expected to vest after January 2, 2015, Aggregate Intrinsic Value	$ 558