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Contingencies and Environmental Remediation (Details) $ in Millions | 6 Months Ended |
--- | --- | ---
Jul. 01, 2018 USD ($) item | Aug. 31, 2017 item
Litigation contingencies |  |
Possible loss | $ | $ 5.7 |
CWV |  |
Litigation contingencies |  |
Number of companies included in group for environmental liability notice |  | 162
Number of companies joining group for environmental liability notice | 43 |
Number of potentially responsible parties for environmental liability | 2,000 |

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