Stockholders' Equity - Additional Information (Detail) - USD ($)	3 Months Ended												12 Months Ended
	Dec. 31, 2015	Sep. 27, 2015	Jun. 28, 2015	Mar. 29, 2015	Dec. 31, 2014	Sep. 28, 2014	Jun. 29, 2014	Mar. 30, 2014	Dec. 31, 2013	Sep. 29, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Sep. 24, 2015
Shareholders Equity [Line Items]
Common stock, shares authorized	1,500,000,000				1,500,000,000								1,500,000,000	1,500,000,000
Preferred stock, shares authorized	50,000,000				50,000,000								50,000,000	50,000,000
Common stock, shares issued and outstanding	305,000,000				316,000,000								305,000,000	316,000,000
Common stock, shares outstanding for Balance Sheet presentation purposes	303,000,000				314,000,000								303,000,000	314,000,000
Preferred stock, shares issued and outstanding	0				0								0	0
Cash paid for repurchases of common stock													$ 3,071,000,000	$ 1,900,000,000	$ 1,762,000,000
Number of shares of common stock repurchased with cash													15,200,000	11,500,000	16,200,000
Additional share repurchase program authorized amount																$ 3,000,000,000
Remaining authorized repurchase amount under share repurchase program	$ 3,600,000,000												$ 3,600,000,000
Common stock par value, per share	$ 1				$ 1								$ 1	$ 1
Additional paid-in capital	$ 0				$ 0								$ 0	$ 0
Reduction to stockholder's equity due to repurchases of common stock													3,071,000,000	1,900,000,000	$ 1,744,000,000
Dividends preferred stock cash													$ 1,900,000,000	$ 1,800,000,000	$ 1,500,000,000
Dividends, per share													$ 6.15	$ 5.49	$ 4.78
Quarterly increase dividend rate													10.00%	10.00%	10.00%
Common stock dividends per share declared	$ 1.65	$ 1.50	$ 1.50	$ 1.50	$ 1.50	$ 1.33	$ 1.33	$ 1.33	$ 1.33	$ 1.15	$ 1.15	$ 1.15	$ 6.15	$ 5.49	$ 4.78
Retained Earnings
Shareholders Equity [Line Items]
Reduction to stockholder's equity due to repurchases of common stock													$ 2,400,000,000	$ 1,096,000,000	$ 434,000,000