Condensed Consolidating Financial Statements - Condensed Consolidating Statements of Earnings (Unaudited) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jul. 01, 2018	Jun. 30, 2019	Jul. 01, 2018
Condensed Financial Statements [Line Items]
Revenue	$ 9,555	$ 9,186	$ 18,816	$ 16,721
Cost of sales	(7,869)	(7,486)	(15,502)	(13,476)
G&A	(596)	(612)	(1,210)	(1,149)
Operating earnings	1,090	1,088	2,104	2,096
Interest, net	(119)	(103)	(236)	(130)
Other, net	12	(15)	30	(36)
Earnings before income tax	983	970	1,898	1,930
Provision for income tax, net	(177)	(184)	(347)	(345)
Equity in net earnings of subsidiaries	0	0	0	0
Net earnings	806	786	1,551	1,585
Comprehensive income	1,013	619	1,853	1,485
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
Equity in net earnings of subsidiaries	(884)	(911)	(1,717)	(1,712)
Net earnings	(884)	(911)	(1,717)	(1,712)
Comprehensive income	(1,048)	(699)	(1,937)	(1,521)
Parent Company
Condensed Financial Statements [Line Items]
Revenue	0	0	0	0
Cost of sales	21	9	39	28
G&A	(19)	(45)	(41)	(58)
Operating earnings	2	(36)	(2)	(30)
Interest, net	(110)	(94)	(217)	(120)
Other, net	(10)	(38)	(18)	(62)
Earnings before income tax	(118)	(168)	(237)	(212)
Provision for income tax, net	40	43	71	85
Equity in net earnings of subsidiaries	884	911	1,717	1,712
Net earnings	806	786	1,551	1,585
Comprehensive income	1,013	619	1,853	1,485
Guarantor Subsidiaries
Condensed Financial Statements [Line Items]
Revenue	7,437	6,793	14,382	13,277
Cost of sales	(6,111)	(5,475)	(11,837)	(10,677)
G&A	(428)	(418)	(847)	(854)
Operating earnings	898	900	1,698	1,746
Interest, net	1	(1)	1	(1)
Other, net	3	4	7	5
Earnings before income tax	902	903	1,706	1,750
Provision for income tax, net	(173)	(178)	(328)	(343)
Equity in net earnings of subsidiaries	0	0	0	0
Net earnings	729	725	1,378	1,407
Comprehensive income	733	740	1,385	1,425
Non-Guarantor Subsidiaries
Condensed Financial Statements [Line Items]
Revenue	2,118	2,393	4,434	3,444
Cost of sales	(1,779)	(2,020)	(3,704)	(2,827)
G&A	(149)	(149)	(322)	(237)
Operating earnings	190	224	408	380
Interest, net	(10)	(8)	(20)	(9)
Other, net	19	19	41	21
Earnings before income tax	199	235	429	392
Provision for income tax, net	(44)	(49)	(90)	(87)
Equity in net earnings of subsidiaries	0	0	0	0
Net earnings	155	186	339	305
Comprehensive income	$ 315	$ (41)	$ 552	$ 96