INFORMATION ON BUSINESS SEGMENTS - Income Statement Information For Each Segment (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 24, 2018	Jun. 25, 2017	Jun. 24, 2018	Jun. 25, 2017
Segment Reporting Information [Line Items]
Total net sales	$ 13,398	$ 12,563	$ 25,033	$ 23,775
Aeronautics
Segment Reporting Information [Line Items]
Total net sales	5,321	4,922	9,719	9,042
MFC
Segment Reporting Information [Line Items]
Total net sales	2,085	1,784	3,762	3,333
RMS
Segment Reporting Information [Line Items]
Total net sales	3,566	3,414	6,789	6,541
Space
Segment Reporting Information [Line Items]
Total net sales	2,426	2,443	4,763	4,859
United States
Segment Reporting Information [Line Items]
Total net sales	9,855	8,967	18,122	17,170
United States | Aeronautics
Segment Reporting Information [Line Items]
Total net sales	3,486	3,267	6,307	5,984
United States | MFC
Segment Reporting Information [Line Items]
Total net sales	1,543	1,097	2,666	2,201
United States | RMS
Segment Reporting Information [Line Items]
Total net sales	2,744	2,485	5,186	4,841
United States | Space
Segment Reporting Information [Line Items]
Total net sales	2,082	2,118	3,963	4,144
Asia Pacific
Segment Reporting Information [Line Items]
Total net sales	1,243	1,187	2,442	2,088
Asia Pacific | Aeronautics
Segment Reporting Information [Line Items]
Total net sales	786	694	1,540	1,225
Asia Pacific | MFC
Segment Reporting Information [Line Items]
Total net sales	125	114	223	206
Asia Pacific | RMS
Segment Reporting Information [Line Items]
Total net sales	301	343	625	617
Asia Pacific | Space
Segment Reporting Information [Line Items]
Total net sales	31	36	54	40
Europe
Segment Reporting Information [Line Items]
Total net sales	1,280	1,214	2,438	2,328
Europe | Aeronautics
Segment Reporting Information [Line Items]
Total net sales	678	599	1,186	1,102
Europe | MFC
Segment Reporting Information [Line Items]
Total net sales	46	82	115	157
Europe | RMS
Segment Reporting Information [Line Items]
Total net sales	224	245	379	447
Europe | Space
Segment Reporting Information [Line Items]
Total net sales	332	288	758	622
Middle East
Segment Reporting Information [Line Items]
Total net sales	808	909	1,623	1,676
Middle East | Aeronautics
Segment Reporting Information [Line Items]
Total net sales	320	300	577	635
Middle East | MFC
Segment Reporting Information [Line Items]
Total net sales	364	482	744	752
Middle East | RMS
Segment Reporting Information [Line Items]
Total net sales	143	126	314	236
Middle East | Space
Segment Reporting Information [Line Items]
Total net sales	(19)	1	(12)	53
Other
Segment Reporting Information [Line Items]
Total net sales	212	286	408	513
Other | Aeronautics
Segment Reporting Information [Line Items]
Total net sales	51	62	109	96
Other | MFC
Segment Reporting Information [Line Items]
Total net sales	7	9	14	17
Other | RMS
Segment Reporting Information [Line Items]
Total net sales	154	215	285	400
Other | Space
Segment Reporting Information [Line Items]
Total net sales	0	0	0	0
U.S. Government
Segment Reporting Information [Line Items]
Total net sales	9,624	8,776	17,703	16,843
U.S. Government | Aeronautics
Segment Reporting Information [Line Items]
Total net sales	3,444	3,233	6,209	5,916
U.S. Government | MFC
Segment Reporting Information [Line Items]
Total net sales	1,502	1,059	2,590	2,136
U.S. Government | RMS
Segment Reporting Information [Line Items]
Total net sales	2,608	2,379	4,964	4,674
U.S. Government | Space
Segment Reporting Information [Line Items]
Total net sales	2,070	2,105	3,940	4,117
International
Segment Reporting Information [Line Items]
Total net sales	3,543	3,596	6,911	6,605
International | Aeronautics
Segment Reporting Information [Line Items]
Total net sales	1,835	1,655	3,412	3,058
International | MFC
Segment Reporting Information [Line Items]
Total net sales	542	687	1,096	1,132
International | RMS
Segment Reporting Information [Line Items]
Total net sales	822	929	1,603	1,700
International | Space
Segment Reporting Information [Line Items]
Total net sales	344	325	800	715
U.S. commercial and other
Segment Reporting Information [Line Items]
Total net sales	231	191	419	327
U.S. commercial and other | Aeronautics
Segment Reporting Information [Line Items]
Total net sales	42	34	98	68
U.S. commercial and other | MFC
Segment Reporting Information [Line Items]
Total net sales	41	38	76	65
U.S. commercial and other | RMS
Segment Reporting Information [Line Items]
Total net sales	136	106	222	167
U.S. commercial and other | Space
Segment Reporting Information [Line Items]
Total net sales	12	13	23	27
Fixed-price
Segment Reporting Information [Line Items]
Total net sales	8,211	7,654	15,146	14,401
Fixed-price | Aeronautics
Segment Reporting Information [Line Items]
Total net sales	3,906	3,312	7,121	6,228
Fixed-price | MFC
Segment Reporting Information [Line Items]
Total net sales	1,395	1,258	2,507	2,343
Fixed-price | RMS
Segment Reporting Information [Line Items]
Total net sales	2,450	2,492	4,658	4,728
Fixed-price | Space
Segment Reporting Information [Line Items]
Total net sales	460	592	860	1,102
Cost-reimbursable
Segment Reporting Information [Line Items]
Total net sales	5,187	4,909	9,887	9,374
Cost-reimbursable | Aeronautics
Segment Reporting Information [Line Items]
Total net sales	1,415	1,610	2,598	2,814
Cost-reimbursable | MFC
Segment Reporting Information [Line Items]
Total net sales	690	526	1,255	990
Cost-reimbursable | RMS
Segment Reporting Information [Line Items]
Total net sales	1,116	922	2,131	1,813
Cost-reimbursable | Space
Segment Reporting Information [Line Items]
Total net sales	1,966	1,851	3,903	3,757
Products
Segment Reporting Information [Line Items]
Total net sales	11,150	10,622	20,912	20,235
Products | Aeronautics
Segment Reporting Information [Line Items]
Total net sales	4,511	4,206	8,281	7,840
Products | MFC
Segment Reporting Information [Line Items]
Total net sales	1,709	1,452	3,062	2,709
Products | RMS
Segment Reporting Information [Line Items]
Total net sales	2,904	2,863	5,621	5,511
Products | Space
Segment Reporting Information [Line Items]
Total net sales	2,026	2,101	3,948	4,175
Services
Segment Reporting Information [Line Items]
Total net sales	2,248	1,941	4,121	3,540
Services | Aeronautics
Segment Reporting Information [Line Items]
Total net sales	810	716	1,438	1,202
Services | MFC
Segment Reporting Information [Line Items]
Total net sales	376	332	700	624
Services | RMS
Segment Reporting Information [Line Items]
Total net sales	662	551	1,168	1,030
Services | Space
Segment Reporting Information [Line Items]
Total net sales	$ 400	$ 342	$ 815	$ 684