Prior-Period Financial Statements - Consolidated Statement of Shareholders' Equity (Unaudited) (Details) - USD ($) $ in Millions	Apr. 02, 2017	Dec. 31, 2016	Apr. 03, 2016	Dec. 31, 2015
New Accounting Pronouncements
Total shareholders’ equity	$ 10,583	$ 10,301	$ 10,192	$ 10,440
Cumulative-effect adjustment of ASC Topic 606 on January 1, 2016				(298)
Total shareholders' equity				10,440
Previously Reported
New Accounting Pronouncements
Total shareholders’ equity		10,976	(156)	10,738
Accounting Standards Update 2016-09 | Restatement Adjustment
New Accounting Pronouncements
Total shareholders’ equity		0	0
Accounting Standards Update 2014-09 | Restatement Adjustment
New Accounting Pronouncements
Total shareholders’ equity		(675)	(92)
Accounting Standards Update 2015-17 | Restatement Adjustment
New Accounting Pronouncements
Total shareholders’ equity		0	0
Common Stock, Par
New Accounting Pronouncements
Total shareholders’ equity	482	482	482	482
Total shareholders' equity				482
Common Stock, Par | Previously Reported
New Accounting Pronouncements
Total shareholders’ equity			0
Common Stock, Par | Accounting Standards Update 2016-09 | Restatement Adjustment
New Accounting Pronouncements
Total shareholders’ equity			0
Common Stock, Par | Accounting Standards Update 2014-09 | Restatement Adjustment
New Accounting Pronouncements
Total shareholders’ equity			0
Common Stock, Par | Accounting Standards Update 2015-17 | Restatement Adjustment
New Accounting Pronouncements
Total shareholders’ equity			0
Common Stock, Surplus
New Accounting Pronouncements
Total shareholders’ equity	2,762	2,819	2,725	2,730
Total shareholders' equity				2,730
Common Stock, Surplus | Previously Reported
New Accounting Pronouncements
Total shareholders’ equity			10
Common Stock, Surplus | Accounting Standards Update 2016-09 | Restatement Adjustment
New Accounting Pronouncements
Total shareholders’ equity			(15)
Common Stock, Surplus | Accounting Standards Update 2014-09 | Restatement Adjustment
New Accounting Pronouncements
Total shareholders’ equity			0
Common Stock, Surplus | Accounting Standards Update 2015-17 | Restatement Adjustment
New Accounting Pronouncements
Total shareholders’ equity			0
Retained Earnings
New Accounting Pronouncements
Total shareholders’ equity	25,049	24,543	23,310	22,903
Cumulative-effect adjustment of ASC Topic 606 on January 1, 2016				(301)
Total shareholders' equity				22,903
Retained Earnings | Previously Reported
New Accounting Pronouncements
Total shareholders’ equity			483	23,204
Retained Earnings | Accounting Standards Update 2016-09 | Restatement Adjustment
New Accounting Pronouncements
Total shareholders’ equity			15
Retained Earnings | Accounting Standards Update 2014-09 | Restatement Adjustment
New Accounting Pronouncements
Total shareholders’ equity			(91)
Retained Earnings | Accounting Standards Update 2015-17 | Restatement Adjustment
New Accounting Pronouncements
Total shareholders’ equity			0
Treasury Stock
New Accounting Pronouncements
Total shareholders’ equity	(14,448)	(14,156)	(13,386)	(12,392)
Total shareholders' equity				(12,392)
Treasury Stock | Previously Reported
New Accounting Pronouncements
Total shareholders’ equity			(994)
Treasury Stock | Accounting Standards Update 2016-09 | Restatement Adjustment
New Accounting Pronouncements
Total shareholders’ equity			0
Treasury Stock | Accounting Standards Update 2014-09 | Restatement Adjustment
New Accounting Pronouncements
Total shareholders’ equity			0
Treasury Stock | Accounting Standards Update 2015-17 | Restatement Adjustment
New Accounting Pronouncements
Total shareholders’ equity			0
Accumulated Other Comprehensive Loss
New Accounting Pronouncements
Total shareholders’ equity	$ (3,262)	$ (3,387)	(2,939)	(3,283)
Cumulative-effect adjustment of ASC Topic 606 on January 1, 2016				3
Total shareholders' equity				(3,283)
Accumulated Other Comprehensive Loss | Previously Reported
New Accounting Pronouncements
Total shareholders’ equity			345	$ (3,286)
Accumulated Other Comprehensive Loss | Accounting Standards Update 2016-09 | Restatement Adjustment
New Accounting Pronouncements
Total shareholders’ equity			0
Accumulated Other Comprehensive Loss | Accounting Standards Update 2014-09 | Restatement Adjustment
New Accounting Pronouncements
Total shareholders’ equity			(1)
Accumulated Other Comprehensive Loss | Accounting Standards Update 2015-17 | Restatement Adjustment
New Accounting Pronouncements
Total shareholders’ equity			$ 0