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Casualty, Environmental and Other Reserves - Schedule of Casualty, Environmental and Other Reserves (Details) - USD ($) $ in Millions | Mar. 31, 2017 | Dec. 30, 2016
--- | --- | ---
Loss Contingencies [Line Items] |  |
Current | $ 114 | $ 115
Long-term | 252 | 259
Total | 366 | 374
Total Casualty |  |
Loss Contingencies [Line Items] |  |
Current | 53 | 53
Long-term | 173 | 176
Total | 226 | 229
Personal Injury |  |
Loss Contingencies [Line Items] |  |
Current | 46 | 46
Long-term | 122 | 124
Total | 168 | 170
Occupational(a) |  |
Loss Contingencies [Line Items] |  |
Current | 7 | 7
Long-term | 51 | 52
Total | 58 | 59
Environmental |  |
Loss Contingencies [Line Items] |  |
Current | 42 | 42
Long-term | 51 | 53
Total | 93 | 95
Other |  |
Loss Contingencies [Line Items] |  |
Current | 19 | 20
Long-term | 28 | 30
Total | $ 47 | $ 50

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