Prior-Period Financial Statements - Consolidated Balance Sheet (Unaudited) (Details) - USD ($) $ in Millions		Jul. 02, 2017	Dec. 31, 2016	Jul. 03, 2016	Dec. 31, 2015
New Accounting Pronouncements
Cash and equivalents		$ 1,856	$ 2,334	$ 1,899	$ 2,785
Accounts receivable		3,690	3,399
Unbilled receivables		5,045	4,212
Inventories		5,839	5,817
Other current assets		696	772
Total current assets		17,126	16,534
Property, plant and equipment, net		3,424	3,477
Intangible assets, net		685	678
Goodwill	[1]	11,679	11,445
Other assets		879	1,038
Total noncurrent assets		16,667	16,638
Total assets		33,793	33,172
Less current portion		989	900
Accounts payable		2,620	2,538
Customer advances and deposits		6,822	6,827
Other current liabilities		3,072	3,185
Total current liabilities		13,503	13,450
Long-term debt		2,989	2,988
Other liabilities		6,349	6,433
Commitments and contingencies
Total noncurrent liabilities		9,338	9,421
Common stock		482	482
Surplus		2,796	2,819
Retained earnings		25,546	24,543
Treasury stock		(14,950)	(14,156)
Accumulated other comprehensive loss		(2,922)	(3,387)	(2,960)	(3,283)
Total shareholders’ equity		10,952	10,301	10,579	10,440
Total liabilities and shareholders’ equity		33,793	33,172
Noncurrent deferred tax liabilities		$ 202	183
Previously Reported
New Accounting Pronouncements
Cash and equivalents			2,334	1,899	2,785
Accounts receivable			3,611
Unbilled receivables			5,282
Inventories			3,523
Other current assets			697
Total current assets			15,447
Property, plant and equipment, net			3,467
Intangible assets, net			678
Goodwill			11,445
Other assets			1,835
Total noncurrent assets			17,425
Total assets			32,872
Less current portion			900
Accounts payable			2,538
Customer advances and deposits			4,939
Other current liabilities			4,469
Total current liabilities			12,846
Long-term debt			2,988
Other liabilities			6,062
Total noncurrent liabilities			9,050
Common stock			482
Surplus			2,819
Retained earnings			25,227
Treasury stock			(14,156)
Accumulated other comprehensive loss			(3,396)
Total shareholders’ equity			10,976	257	10,738
Total liabilities and shareholders’ equity			32,872
Accounting Standards Update 2015-17
New Accounting Pronouncements
Current deferred tax assets			10
Noncurrent deferred tax assets			10
Current deferred tax liabilities			335
Noncurrent deferred tax liabilities			335
Accounting Standards Update 2015-17 | Restatement Adjustment
New Accounting Pronouncements
Cash and equivalents			0	0	0
Accounts receivable			0
Unbilled receivables			0
Inventories			0
Other current assets			(15)
Total current assets			(15)
Property, plant and equipment, net			0
Intangible assets, net			0
Goodwill			0
Other assets			(797)
Total noncurrent assets			(797)
Total assets			(812)
Less current portion			0
Accounts payable			0
Customer advances and deposits			0
Other current liabilities			(923)
Total current liabilities			(923)
Long-term debt			0
Other liabilities			111
Total noncurrent liabilities			111
Common stock			0
Surplus			0
Retained earnings			0
Treasury stock			0
Accumulated other comprehensive loss			0
Total shareholders’ equity			0	0
Total liabilities and shareholders’ equity			(812)
Accounting Standards Update 2016-09 | Restatement Adjustment
New Accounting Pronouncements
Cash and equivalents			0	0	0
Accounts receivable			0
Unbilled receivables			0
Inventories			0
Other current assets			0
Total current assets			0
Property, plant and equipment, net			0
Intangible assets, net			0
Goodwill			0
Other assets			0
Total noncurrent assets			0
Total assets			0
Less current portion			0
Accounts payable			0
Customer advances and deposits			0
Other current liabilities			0
Total current liabilities			0
Long-term debt			0
Other liabilities			0
Total noncurrent liabilities			0
Common stock			0
Surplus			0
Retained earnings			0
Treasury stock			0
Accumulated other comprehensive loss			0
Total shareholders’ equity			0	0
Total liabilities and shareholders’ equity			0
Accounting Standards Update 2014-09 | Restatement Adjustment
New Accounting Pronouncements
Cash and equivalents			0	0	$ 0
Accounts receivable			(212)
Unbilled receivables			(1,070)
Inventories			2,294
Other current assets			90
Total current assets			1,102
Property, plant and equipment, net			10
Intangible assets, net			0
Goodwill			0
Other assets			0
Total noncurrent assets			10
Total assets			1,112
Less current portion			0
Accounts payable			0
Customer advances and deposits			1,888
Other current liabilities			(361)
Total current liabilities			1,527
Long-term debt			0
Other liabilities			260
Commitments and contingencies
Total noncurrent liabilities			260
Common stock			0
Surplus			0
Retained earnings			(684)
Treasury stock			0
Accumulated other comprehensive loss			9
Total shareholders’ equity			(675)	$ (118)
Total liabilities and shareholders’ equity			$ 1,112

[1] Goodwill on December 31, 2016, and July 2, 2017, in the Information Systems and Technology reporting unit is net of $2 billion of accumulated impairment losses.