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Casualty, Environmental and Other Reserves - Schedule of Casualty, Environmental and Other Reserves (Details) - USD ($) $ in Millions | Jun. 24, 2016 | Dec. 25, 2015
--- | --- | ---
Loss Contingencies [Line Items] |  |
Current | $ 133 | $ 131
Long-term | 246 | 269
Total | 379 | 400
Total Casualty |  |
Loss Contingencies [Line Items] |  |
Current | 73 | 69
Long-term | 173 | 200
Total | 246 | 269
Personal Injury |  |
Loss Contingencies [Line Items] |  |
Current | 57 | 57
Long-term | 134 | 147
Total | 191 | 204
Asbestos |  |
Loss Contingencies [Line Items] |  |
Current | 12 | 9
Long-term | 34 | 44
Total | 46 | 53
Occupational |  |
Loss Contingencies [Line Items] |  |
Current | 4 | 3
Long-term | 5 | 9
Total | 9 | 12
Environmental |  |
Loss Contingencies [Line Items] |  |
Current | 41 | 42
Long-term | 43 | 40
Total | 84 | 82
Other |  |
Loss Contingencies [Line Items] |  |
Current | 19 | 20
Long-term | 30 | 29
Total | $ 49 | $ 49

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