Condensed Consolidating Statements of Earnings (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Oct. 01, 2017	Sep. 30, 2018	Oct. 01, 2017
Condensed Financial Statements [Line Items]
Revenue	$ 9,094	$ 7,580	$ 25,815	$ 22,696
Cost of sales	(7,407)	(6,014)	(20,883)	(18,051)
G&A	(552)	(503)	(1,701)	(1,469)
Operating earnings	1,135	1,063	3,231	3,176
Interest, net	(114)	(27)	(244)	(76)
Other, net	2	(9)	(34)	(31)
Earnings before income tax	1,023	1,027	2,953	3,069
Provision for income tax, net	(159)	(263)	(504)	(793)
Discontinued operations, net of tax	(13)	0	(13)	0
Equity in net earnings of subsidiaries	0	0	0	0
Net earnings	851	764	2,436	2,276
Comprehensive income	1,048	1,035	2,533	3,012
Consolidating Adjustments
Condensed Financial Statements [Line Items]
Revenue	0	0	0	0
Cost of sales	0	0	0	0
G&A	0	0	0	0
Operating earnings	0	0	0	0
Interest, net	0	0	0	0
Other, net	0	0	0	0
Earnings before income tax	0	0	0	0
Provision for income tax, net	0	0	0	0
Discontinued operations, net of tax	0		0
Equity in net earnings of subsidiaries	(962)	(772)	(2,674)	(2,259)
Net earnings	(962)	(772)	(2,674)	(2,259)
Comprehensive income	(1,112)	(1,019)	(2,633)	(2,912)
Parent Company
Condensed Financial Statements [Line Items]
Revenue	0	0	0	0
Cost of sales	26	17	54	48
G&A	(15)	(14)	(73)	(36)
Operating earnings	11	3	(19)	12
Interest, net	(105)	(24)	(225)	(71)
Other, net	(16)	(13)	(78)	(43)
Earnings before income tax	(110)	(34)	(322)	(102)
Provision for income tax, net	12	26	97	119
Discontinued operations, net of tax	(13)		(13)
Equity in net earnings of subsidiaries	962	772	2,674	2,259
Net earnings	851	764	2,436	2,276
Comprehensive income	1,048	1,035	2,533	3,012
Guarantor Subsidiaries
Condensed Financial Statements [Line Items]
Revenue	6,811	6,556	20,088	19,832
Cost of sales	(5,518)	(5,226)	(16,195)	(15,891)
G&A	(393)	(414)	(1,247)	(1,206)
Operating earnings	900	916	2,646	2,735
Interest, net	(2)	0	(1)	0
Other, net	3	3	8	9
Earnings before income tax	901	919	2,653	2,744
Provision for income tax, net	(132)	(283)	(475)	(877)
Discontinued operations, net of tax	0		0
Equity in net earnings of subsidiaries	0	0	0	0
Net earnings	769	636	2,178	1,867
Comprehensive income	790	648	2,217	1,907
Non-Guarantor Subsidiaries
Condensed Financial Statements [Line Items]
Revenue	2,283	1,024	5,727	2,864
Cost of sales	(1,915)	(805)	(4,742)	(2,208)
G&A	(144)	(75)	(381)	(227)
Operating earnings	224	144	604	429
Interest, net	(7)	(3)	(18)	(5)
Other, net	15	1	36	3
Earnings before income tax	232	142	622	427
Provision for income tax, net	(39)	(6)	(126)	(35)
Discontinued operations, net of tax	0		0
Equity in net earnings of subsidiaries	0	0	0	0
Net earnings	193	136	496	392
Comprehensive income	$ 322	$ 371	$ 416	$ 1,005