Stockholders' Equity - Additional Information (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended				6 Months Ended
	Sep. 24, 2017	Jun. 25, 2017	Sep. 25, 2016	Jun. 26, 2016	Jun. 25, 2017	Jun. 26, 2016	Dec. 31, 2016
Shareholders Equity [Line Items]
Cash paid for repurchases of common stock					$ 1,000	$ 1,002
Number of shares of common stock repurchased with cash					3.8
Remaining authorized repurchase amount under share repurchase program		$ 2,500			$ 2,500
Additional paid-in capital		$ 0			$ 0		$ 0
Common stock par value, per share		$ 1			$ 1		$ 1
Reduction to stockholder's equity due to repurchases of common stock					$ 1,000	1,002
Dividends declared		$ 1,100	$ 503	$ 1,000	$ 1,585	$ 1,519
Dividends declared, per share (in USD)		$ 3.64	$ 1.65	$ 3.30	$ 5.46	$ 4.95
Scenario Forecast
Shareholders Equity [Line Items]
Dividends declared	$ 528
Dividends declared, per share (in USD)	$ 1.82
Retained Earnings
Shareholders Equity [Line Items]
Reduction to stockholder's equity due to repurchases of common stock					$ 828	$ 838
Dividends declared					$ 1,585	$ 1,519