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Casualty, Environmental and Other Reserves - Schedule of Casualty, Environmental and Other Reserves (Details) - USD ($) $ in Millions | Sep. 30, 2017 | Dec. 30, 2016
--- | --- | ---
Loss Contingencies [Line Items] |  |
Current | $ 122 | $ 115
Long-term | 253 | 259
Total | 375 | 374
Total Casualty |  |
Loss Contingencies [Line Items] |  |
Current | 49 | 53
Long-term | 175 | 176
Total | 224 | 229
Personal Injury |  |
Loss Contingencies [Line Items] |  |
Current | 45 | 46
Long-term | 120 | 124
Total | 165 | 170
Occupational |  |
Loss Contingencies [Line Items] |  |
Current | 4 | 7
Long-term | 55 | 52
Total | 59 | 59
Environmental |  |
Loss Contingencies [Line Items] |  |
Current | 43 | 42
Long-term | 46 | 53
Total | 89 | 95
Other |  |
Loss Contingencies [Line Items] |  |
Current | 30 | 20
Long-term | 32 | 30
Total | $ 62 | $ 50

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