Significant Accounting Policies - Schedule of Effect of Adoption of New Accounting Pronouncement (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 24, 2017	Jun. 25, 2017	Mar. 26, 2017	Dec. 31, 2016	Sep. 25, 2016	Jun. 26, 2016	Mar. 27, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net sales	$ 15,137	$ 12,169	$ 12,685	$ 11,057	$ 13,752	$ 11,551	$ 11,577	$ 10,368	$ 51,048	$ 47,248	$ 40,536
Operating profit	$ 1,859	$ 1,428	$ 1,485	$ 1,149	$ 1,428	$ 1,588	$ 1,375	$ 1,158	$ 5,921	$ 5,549	$ 4,712
Basic
Continuing operations (in dollars per share)	$ (2.50)	$ 3.27	$ 3.27	$ 2.63	$ 3.29	$ 3.64	$ 2.97	$ 2.65	$ 6.70	$ 12.54	$ 10.07
Discontinued operations (in dollars per share)	0.25	0.00	0.00	0.00	0.10	4.38	0.40	0.30	0.26	5.17	1.55
Basic earnings per common share (in dollars per share)	(2.25)	3.27	3.27	2.63	3.39	8.02	3.37	2.95	6.96	17.71	11.62
Diluted
Continuing operations (in dollars per share)	(2.50)	3.24	3.23	2.61	3.25	3.61	2.93	2.61	6.64	12.38	9.93
Discontinued operations (in dollars per share)	0.25	0.00	0.00	0.00	0.10	4.32	0.39	0.30	0.25	5.11	1.53
Diluted earnings per common share (in dollars per share)	$ (2.25)	$ 3.24	$ 3.23	$ 2.61	$ 3.35	$ 7.93	$ 3.32	$ 2.91	$ 6.89	$ 17.49	$ 11.46
Scenario, Plan | ASC 606
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net sales									$ 49,976	$ 47,320
Operating profit									$ 6,759	$ 5,910
Basic
Continuing operations (in dollars per share)									$ 6.63	$ 12.28
Discontinued operations (in dollars per share)									0.26	5.05
Basic earnings per common share (in dollars per share)									6.89	17.33
Diluted
Continuing operations (in dollars per share)									6.57	12.13
Discontinued operations (in dollars per share)									0.25	4.99
Diluted earnings per common share (in dollars per share)									$ 6.82	$ 17.12