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Retirement and Welfare Plans - Hourly Plan, Expected Benefit Payments (Details) - Defined benefit pension plan for factory hourly employees (funded)
$ in Thousands
Apr. 28, 2018
USD ($)
Expected benefit payments  
2019 $ 6,620
2020 6,723
2021 6,830
2022 6,926
2023 6,997
2024 to 2028 35,077
Total $ 69,173