Revenues - Reconciliation of ASC 606 to Prior Accounting Standards (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017	Dec. 31, 2017	Dec. 30, 2017
Consolidated Balance Sheets
Accounts receivable, net	$ 1,121		$ 1,121
Inventories	3,925		3,925			$ 4,150
Other current assets	763		763
Property, plant and equipment, net	2,608		2,608
Other assets	1,869		1,869
Total assets	14,558		14,558			15,340
Other current liabilities	2,175		2,175
Total liabilities	9,196		9,196			9,693
Retained earnings	5,861		5,861			5,368
Total shareholders' equity	5,362		5,362			5,647
Consolidated Statements of Operations
Total revenues	3,726		7,022
Cost of sales	3,073		5,802
Income from continuing operations before income taxes	260	$ 215	478	$ 336
Income tax expense	36	62	65	83
Income from continuing operations	224	153	413	253
Net income	$ 224	$ 153	$ 413	$ 254
Basic earnings per share - continuing operations	$ 0.88	$ 0.57	$ 1.61	$ 0.94
Diluted earnings per share - continuing operations	$ 0.87	$ 0.57	$ 1.59	$ 0.94
Consolidated Statements of Comprehensive Income
Other comprehensive income (loss)	$ (42)	$ 69	$ 32	$ 119
Comprehensive income	182	222	445	373
Consolidated Statements of Cash flows
Net income	224	$ 153	413	254
Income from continuing operations			413
Deferred income taxes			12	21
Accounts receivable, net			(42)	(125)
Inventories			(78)	(61)
Other assets			(38)	(33)
Other liabilities			(165)	(68)
Net cash provided by (used in) operating activities of continuing operations			398	267
Under Prior Accounting
Consolidated Balance Sheets
Accounts receivable, net	1,284		1,284
Inventories	4,134		4,134
Other current assets	350		350
Property, plant and equipment, net	2,614		2,614
Other assets	1,909		1,909
Total assets	14,563		14,563
Other current liabilities	2,302		2,302
Total liabilities	9,323		9,323
Retained earnings	5,739		5,739
Total shareholders' equity	5,240		5,240
Consolidated Statements of Operations
Total revenues	3,701		6,776
Cost of sales	3,068		5,599
Income from continuing operations before income taxes	240		435
Income tax expense	31		54
Income from continuing operations	209		381
Net income	$ 209		$ 381
Basic earnings per share - continuing operations	$ 0.82		$ 1.48
Diluted earnings per share - continuing operations	$ 0.81		$ 1.46
Consolidated Statements of Comprehensive Income
Other comprehensive income (loss)	$ (57)
Comprehensive income	167		$ 413
Consolidated Statements of Cash flows
Net income	209		381
Income from continuing operations			381
Deferred income taxes			1
Accounts receivable, net			(2)
Inventories			(88)
Other assets			(66)
Other liabilities			(124)
Net cash provided by (used in) operating activities of continuing operations			398
ASC 606 | Effect of adoption of ASC 606
Consolidated Balance Sheets
Accounts receivable, net	163		163		$ (203)
Inventories	209		209		(199)
Other current assets	(413)		(413)
Property, plant and equipment, net	6		6
Other assets	40		40
Total assets	5		5
Other current liabilities	127		127
Total liabilities	127		127
Retained earnings	(122)		(122)		$ 90
Total shareholders' equity	(122)		(122)
Consolidated Statements of Operations
Total revenues	(25)		(246)
Cost of sales	(5)		(203)
Income from continuing operations before income taxes	(20)		(43)
Income tax expense	(5)		(11)
Income from continuing operations	(15)		(32)
Net income	$ (15)		$ (32)
Basic earnings per share - continuing operations	$ (0.06)		$ (0.13)
Diluted earnings per share - continuing operations	$ (0.06)		$ (0.13)
Consolidated Statements of Comprehensive Income
Other comprehensive income (loss)	$ (15)		$ (32)
Comprehensive income	(15)		(32)
Consolidated Statements of Cash flows
Net income	(15)		(32)
Income from continuing operations			(32)
Deferred income taxes			(11)
Accounts receivable, net			40
Inventories			(10)
Other assets			(28)
Other liabilities			41
Manufacturing group
Consolidated Balance Sheets
Accounts receivable, net	1,121		1,121			1,363
Inventories	3,925		3,925			4,150
Other current assets	763		763			435
Property, plant and equipment, net	2,608		2,608			2,721
Other assets	1,869		1,869			2,059
Total assets	13,454		13,454			14,171
Other current liabilities	2,175		2,175			2,441
Total liabilities	8,276		8,276			$ 8,740
Consolidated Statements of Operations
Income from continuing operations			398	244
Consolidated Statements of Cash flows
Deferred income taxes			14	22
Accounts receivable, net			(42)	(125)
Inventories			(80)	(60)
Other assets			(39)	(30)
Other liabilities			(162)	(62)
Net cash provided by (used in) operating activities of continuing operations			415	$ 248
Manufacturing group | Under Prior Accounting
Consolidated Balance Sheets
Total assets	13,459		13,459
Total liabilities	8,403		8,403
Manufacturing group | ASC 606 | Effect of adoption of ASC 606
Consolidated Balance Sheets
Total assets	5		5
Total liabilities	127		127
Manufacturing
Consolidated Statements of Operations
Total revenues	3,709		6,989
Manufacturing | Under Prior Accounting
Consolidated Statements of Operations
Total revenues	3,684		6,743
Manufacturing | ASC 606 | Effect of adoption of ASC 606
Consolidated Statements of Operations
Total revenues	$ (25)		$ (246)