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Summary of Financial Information for Each Business Segment (Detail) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 26, 2017 | Mar. 27, 2016 | Dec. 31, 2016
Segment Reporting Information [Line Items] |  |  |  |
Total net sales |  | $ 11,057 | $ 10,368 |
Less: CAS pension cost |  | 562 | 475 |
FAS/CAS pension adjustment |  | 217 | 224 |
Stock-based compensation |  | (44) | (44) |
Severance charges |  |  | (80) |
Other, net | [1],[2] | (75) | (56) |
Total unallocated items |  | 98 | 44 |
Operating profit |  | 1,149 | 1,158 |
Total assets |  | 48,836 |  | $ 47,806
Qualified defined benefit pension plans |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
FAS pension expense |  | (345) | (251) |
Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Operating profit |  | 1,051 | 1,114 |
Total assets |  | 36,202 |  | 35,513
Operating Segments | Aeronautics |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total net sales |  | 4,106 | 3,799 |
Operating profit |  | 436 | 420 |
Total assets |  | 7,900 |  | 7,896
Operating Segments | Missiles and Fire Control |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total net sales |  | 1,489 | 1,434 |
Operating profit |  | 219 | 221 |
Total assets |  | 4,322 |  | 4,000
Operating Segments | Rotary and Mission Systems |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total net sales |  | 3,101 | 3,004 |
Operating profit |  | 108 | 229 |
Total assets |  | 18,435 |  | 18,367
Operating Segments | Space Systems |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total net sales |  | 2,361 | 2,131 |
Operating profit |  | 288 | 244 |
Total assets |  | 5,545 |  | 5,250
Intersegment elimination |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total intersegment sales |  | 561 | 591 |
Intersegment elimination | Aeronautics |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total intersegment sales |  | 32 | 36 |
Intersegment elimination | Missiles and Fire Control |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total intersegment sales |  | 64 | 75 |
Intersegment elimination | Rotary and Mission Systems |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total intersegment sales |  | 439 | 447 |
Intersegment elimination | Space Systems |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total intersegment sales |  | 26 | $ 33 |
Corporate |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total assets | [3] | $ 12,634 |  | $ 12,293
[1] | As a result of the IS&GS divestiture in August 2016, we reclassified $35 million of general corporate overhead costs incurred in the first quarter of 2016 and previously allocated to the IS&GS business segment. These costs were not reported as discontinued operations because they were not directly attributable to the IS&GS business and will continue to be incurred by us. See "Note 3 - Divestitures" for more information.
[2] | In the first quarter of 2017, we recognized a $64 million charge, which represents our portion of a noncash asset impairment charge recorded by an international equity method investee. See "Note 9 - Other" (under the caption "Equity Method Investee Impairment") for more information.
[3] | Corporate assets primarily include cash and cash equivalents, deferred income taxes, environmental receivables and investments held in a separate trust to fund certain of our non-qualified deferred compensation plans.

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