Equity - Additional Information (Detail) - USD ($)		1 Months Ended	9 Months Ended
	Jun. 10, 2015	Oct. 23, 2015	Sep. 25, 2015	Sep. 26, 2014	Dec. 04, 2014	Feb. 05, 2013
Class of Stock [Line Items]
Aggregate amount of repurchased shares			$ 605,000,000	$ 413,000,000
Remaining authorized amount of share repurchase programs			$ 940,000,000
Cash dividend declared per share	$ 0.65		$ 1.95	$ 1.80
Cash dividends			$ 163,000,000
Net reduction of accrued dividends through payment			$ 1,000,000
Dividend paid, record date			Aug. 17, 2015
Dividend paid date			Sep. 15, 2015
Treasury Stock [Member]
Class of Stock [Line Items]
Aggregate amount of repurchased shares			$ 605,000,000	$ 413,000,000
February 5, 2013 Share Repurchase Program [Member]
Class of Stock [Line Items]
Amount of shares authorized to be repurchased						$ 1,500,000,000
Average price per share of repurchased shares			$ 117.01
Aggregate amount of repurchased shares			$ 605,000,000
February 5, 2013 Share Repurchase Program [Member] | Treasury Stock [Member]
Class of Stock [Line Items]
Number of common shares repurchased			5,171,908
December 4, 2014 Share Repurchase Program [Member]
Class of Stock [Line Items]
Amount of shares authorized to be repurchased					$ 1,500,000,000
December 4, 2014 Share Repurchase Program [Member] | Subsequent Event [Member]
Class of Stock [Line Items]
Average price per share of repurchased shares		$ 106.70
Aggregate amount of repurchased shares		$ 75,000,000
December 4, 2014 Share Repurchase Program [Member] | Treasury Stock [Member] | Subsequent Event [Member]
Class of Stock [Line Items]
Number of common shares repurchased		702,650