Segment Information Sales by Customer Type (Details 2) - USD ($) $ in Millions |
3 Months Ended |
12 Months Ended |
Dec. 31, 2019 |
Sep. 30, 2019 |
Jun. 30, 2019 |
Mar. 31, 2019 |
Dec. 31, 2018 |
Sep. 30, 2018 |
Jun. 30, 2018 |
Mar. 31, 2018 |
Dec. 31, 2019 |
Dec. 31, 2018 |
Dec. 31, 2017 |
Revenue, Major Customer [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
Sales |
$ 8,721
|
$ 8,475
|
$ 8,456
|
$ 8,189
|
$ 8,156
|
$ 8,085
|
$ 7,119
|
$ 6,735
|
$ 33,841
|
$ 30,095
|
$ 26,004
|
Concentration Risk, Percentage |
|
|
|
|
|
|
|
|
100.00%
|
100.00%
|
100.00%
|
US Government |
|
|
|
|
|
|
|
|
|
|
|
Revenue, Major Customer [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
Sales |
|
|
|
|
|
|
|
|
$ 27,934
|
$ 24,796
|
$ 21,969
|
Concentration Risk, Percentage |
|
|
|
|
|
|
|
|
83.00%
|
82.00%
|
85.00%
|
US Government | Aeronautics Systems |
|
|
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|
|
|
|
|
|
|
|
Revenue, Major Customer [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
Sales |
|
|
|
|
|
|
|
|
$ 9,258
|
$ 8,732
|
$ 7,817
|
Concentration Risk, Percentage |
|
|
|
|
|
|
|
|
83.00%
|
85.00%
|
86.00%
|
US Government | Defense Systems |
|
|
|
|
|
|
|
|
|
|
|
Revenue, Major Customer [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
Sales |
|
|
|
|
|
|
|
|
$ 4,952
|
$ 4,132
|
$ 3,422
|
Concentration Risk, Percentage |
|
|
|
|
|
|
|
|
66.00%
|
62.00%
|
62.00%
|
US Government | Mission Systems |
|
|
|
|
|
|
|
|
|
|
|
Revenue, Major Customer [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
Sales |
|
|
|
|
|
|
|
|
$ 6,765
|
$ 6,501
|
$ 6,186
|
Concentration Risk, Percentage |
|
|
|
|
|
|
|
|
72.00%
|
73.00%
|
73.00%
|
US Government | Space Systems |
|
|
|
|
|
|
|
|
|
|
|
Revenue, Major Customer [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
Sales |
|
|
|
|
|
|
|
|
$ 6,959
|
$ 5,431
|
$ 4,544
|
Concentration Risk, Percentage |
|
|
|
|
|
|
|
|
94.00%
|
93.00%
|
96.00%
|
International |
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|
Revenue, Major Customer [Line Items] |
|
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|
|
|
|
|
Sales |
|
|
|
|
|
|
|
|
$ 5,154
|
$ 4,434
|
$ 3,452
|
Concentration Risk, Percentage |
|
|
|
|
|
|
|
|
15.00%
|
15.00%
|
13.00%
|
International | Aeronautics Systems |
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|
|
Revenue, Major Customer [Line Items] |
|
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|
|
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|
|
|
|
Sales |
|
|
|
|
|
|
|
|
$ 1,688
|
$ 1,402
|
$ 1,107
|
Concentration Risk, Percentage |
|
|
|
|
|
|
|
|
15.00%
|
13.00%
|
12.00%
|
International | Defense Systems |
|
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|
|
Revenue, Major Customer [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
Sales |
|
|
|
|
|
|
|
|
$ 1,442
|
$ 1,249
|
$ 726
|
Concentration Risk, Percentage |
|
|
|
|
|
|
|
|
19.00%
|
19.00%
|
13.00%
|
International | Mission Systems |
|
|
|
|
|
|
|
|
|
|
|
Revenue, Major Customer [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
Sales |
|
|
|
|
|
|
|
|
$ 1,839
|
$ 1,653
|
$ 1,565
|
Concentration Risk, Percentage |
|
|
|
|
|
|
|
|
19.00%
|
18.00%
|
18.00%
|
International | Space Systems |
|
|
|
|
|
|
|
|
|
|
|
Revenue, Major Customer [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
Sales |
|
|
|
|
|
|
|
|
$ 185
|
$ 130
|
$ 54
|
Concentration Risk, Percentage |
|
|
|
|
|
|
|
|
2.00%
|
2.00%
|
1.00%
|
Other Customers |
|
|
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|
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|
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|
Revenue, Major Customer [Line Items] |
|
|
|
|
|
|
|
|
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|
Sales |
|
|
|
|
|
|
|
|
$ 753
|
$ 865
|
$ 583
|
Concentration Risk, Percentage |
|
|
|
|
|
|
|
|
2.00%
|
3.00%
|
2.00%
|
Other Customers | Aeronautics Systems |
|
|
|
|
|
|
|
|
|
|
|
Revenue, Major Customer [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
Sales |
|
|
|
|
|
|
|
|
$ 67
|
$ 86
|
$ 70
|
Concentration Risk, Percentage |
|
|
|
|
|
|
|
|
1.00%
|
1.00%
|
1.00%
|
Other Customers | Defense Systems |
|
|
|
|
|
|
|
|
|
|
|
Revenue, Major Customer [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
Sales |
|
|
|
|
|
|
|
|
$ 410
|
$ 481
|
$ 357
|
Concentration Risk, Percentage |
|
|
|
|
|
|
|
|
6.00%
|
7.00%
|
7.00%
|
Other Customers | Mission Systems |
|
|
|
|
|
|
|
|
|
|
|
Revenue, Major Customer [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
Sales |
|
|
|
|
|
|
|
|
$ 78
|
$ 77
|
$ 71
|
Concentration Risk, Percentage |
|
|
|
|
|
|
|
|
1.00%
|
1.00%
|
1.00%
|
Other Customers | Space Systems |
|
|
|
|
|
|
|
|
|
|
|
Revenue, Major Customer [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
Sales |
|
|
|
|
|
|
|
|
$ 198
|
$ 221
|
$ 85
|
Concentration Risk, Percentage |
|
|
|
|
|
|
|
|
3.00%
|
4.00%
|
2.00%
|
Intersegment Sales [Member] | Aeronautics Systems |
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|
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|
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|
|
|
|
Revenue, Major Customer [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
Sales |
|
|
|
|
|
|
|
|
$ 103
|
$ 73
|
$ 46
|
Concentration Risk, Percentage |
|
|
|
|
|
|
|
|
1.00%
|
1.00%
|
1.00%
|
Intersegment Sales [Member] | Defense Systems |
|
|
|
|
|
|
|
|
|
|
|
Revenue, Major Customer [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
Sales |
|
|
|
|
|
|
|
|
$ 691
|
$ 750
|
$ 974
|
Concentration Risk, Percentage |
|
|
|
|
|
|
|
|
9.00%
|
12.00%
|
18.00%
|
Intersegment Sales [Member] | Mission Systems |
|
|
|
|
|
|
|
|
|
|
|
Revenue, Major Customer [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
Sales |
|
|
|
|
|
|
|
|
$ 728
|
$ 718
|
$ 638
|
Concentration Risk, Percentage |
|
|
|
|
|
|
|
|
8.00%
|
8.00%
|
8.00%
|
Intersegment Sales [Member] | Space Systems |
|
|
|
|
|
|
|
|
|
|
|
Revenue, Major Customer [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
Sales |
|
|
|
|
|
|
|
|
$ 83
|
$ 63
|
$ 36
|
Concentration Risk, Percentage |
|
|
|
|
|
|
|
|
1.00%
|
1.00%
|
1.00%
|
Operating Segments [Member] | Aeronautics Systems |
|
|
|
|
|
|
|
|
|
|
|
Revenue, Major Customer [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
Sales |
|
|
|
|
|
|
|
|
$ 11,116
|
$ 10,293
|
$ 9,040
|
Concentration Risk, Percentage |
|
|
|
|
|
|
|
|
100.00%
|
100.00%
|
100.00%
|
Operating Segments [Member] | Defense Systems |
|
|
|
|
|
|
|
|
|
|
|
Revenue, Major Customer [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
Sales |
|
|
|
|
|
|
|
|
$ 7,495
|
$ 6,612
|
$ 5,479
|
Concentration Risk, Percentage |
|
|
|
|
|
|
|
|
100.00%
|
100.00%
|
100.00%
|
Operating Segments [Member] | Mission Systems |
|
|
|
|
|
|
|
|
|
|
|
Revenue, Major Customer [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
Sales |
|
|
|
|
|
|
|
|
$ 9,410
|
$ 8,949
|
$ 8,460
|
Concentration Risk, Percentage |
|
|
|
|
|
|
|
|
100.00%
|
100.00%
|
100.00%
|
Operating Segments [Member] | Space Systems |
|
|
|
|
|
|
|
|
|
|
|
Revenue, Major Customer [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
Sales |
|
|
|
|
|
|
|
|
$ 7,425
|
$ 5,845
|
$ 4,719
|
Concentration Risk, Percentage |
|
|
|
|
|
|
|
|
100.00%
|
100.00%
|
100.00%
|