Prior-Period Financial Statements - Consolidated Balance Sheet (Unaudited) (Details) - USD ($) $ in Millions	Apr. 02, 2017	Dec. 31, 2016		Apr. 03, 2016	Dec. 31, 2015
New Accounting Pronouncements
Cash and equivalents	$ 2,168	$ 2,334		$ 1,907	$ 2,785
Accounts receivable	3,483	3,399
Unbilled receivables	4,557	4,212
Inventories	5,822	5,817
Other current assets	584	772
Total current assets	16,614	16,534
Property, plant and equipment, net	3,412	3,477
Intangible assets, net	679	678
Goodwill	11,532	11,445	[1]
Other assets	974	1,038
Total noncurrent assets	16,597	16,638
Total assets	33,211	33,172
Less current portion	901	900
Accounts payable	2,466	2,538
Customer advances and deposits	6,686	6,827
Other current liabilities	3,112	3,185
Total current liabilities	13,165	13,450
Long-term debt	2,988	2,988
Other liabilities	6,475	6,433
Commitments and contingencies
Total noncurrent liabilities	9,463	9,421
Common stock	482	482
Surplus	2,762	2,819
Retained earnings	25,049	24,543
Treasury stock	(14,448)	(14,156)
Accumulated other comprehensive loss	(3,262)	(3,387)		(2,939)	(3,283)
Total shareholders’ equity	10,583	10,301		10,192	10,440
Total liabilities and shareholders’ equity	33,211	33,172
Noncurrent deferred tax liabilities	$ 187	183
Previously Reported
New Accounting Pronouncements
Cash and equivalents		2,334		1,907	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		(156)	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)		$ (92)
Total liabilities and shareholders’ equity		$ 1,112

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