Condensed Consolidating Financial Statements - Condensed Consolidating Statements of Earnings (Unaudited) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
Condensed Financial Statements [Line Items]
Revenue	$ 9,261	$ 7,535
Cost of sales	(7,633)	(5,990)
G&A	(614)	(537)
Operating earnings	1,014	1,008
Interest, net	(117)	(27)
Other, net	18	(21)
Earnings before income tax	915	960
Provision for income tax, net	(170)	(161)
Equity in net earnings of subsidiaries	0	0
Net earnings	745	799
Comprehensive income	840	866
Consolidating Adjustments
Condensed Financial Statements [Line Items]
Revenue	0	0
Cost of sales	0	0
G&A	0	0
Operating earnings	0	0
Interest, net	0	0
Other, net	0	0
Earnings before income tax	0	0
Provision for income tax, net	0	0
Equity in net earnings of subsidiaries	(833)	(801)
Net earnings	(833)	(801)
Comprehensive income	(889)	(822)
Parent Company
Condensed Financial Statements [Line Items]
Revenue	0	0
Cost of sales	18	19
G&A	(22)	(13)
Operating earnings	(4)	6
Interest, net	(107)	(26)
Other, net	(8)	(24)
Earnings before income tax	(119)	(44)
Provision for income tax, net	31	42
Equity in net earnings of subsidiaries	833	801
Net earnings	745	799
Comprehensive income	840	866
Guarantor Subsidiaries
Condensed Financial Statements [Line Items]
Revenue	6,945	6,484
Cost of sales	(5,726)	(5,202)
G&A	(419)	(436)
Operating earnings	800	846
Interest, net	0	0
Other, net	4	1
Earnings before income tax	804	847
Provision for income tax, net	(155)	(165)
Equity in net earnings of subsidiaries	0	0
Net earnings	649	682
Comprehensive income	652	685
Non-Guarantor Subsidiaries
Condensed Financial Statements [Line Items]
Revenue	2,316	1,051
Cost of sales	(1,925)	(807)
G&A	(173)	(88)
Operating earnings	218	156
Interest, net	(10)	(1)
Other, net	22	2
Earnings before income tax	230	157
Provision for income tax, net	(46)	(38)
Equity in net earnings of subsidiaries	0	0
Net earnings	184	119
Comprehensive income	$ 237	$ 137