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Debt (Maturities of Long-term Debt) (Details) - USD ($)
$ in Millions
Jun. 29, 2018
Mar. 30, 2018
Long-term Debt, Fiscal Year Maturity [Abstract]    
2020 $ 600  
2021 1,250  
2022 1,750  
2023 400  
Thereafter 1,100  
Total future maturities of debt $ 5,100 $ 5,100