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Retirement Benefit Plans - Narrative (Details) - USD ($)
$ in Millions
9 Months Ended
Jan. 28, 2022
Jan. 29, 2021
Simplification Restructuring Plan    
Defined Benefit Plan Disclosure [Line Items]    
Incremental expense related to acceptance of voluntary early retirement packages   $ 97
Incremental expense related to acceptance of voluntary early retirement packages, amount related to defined contribution plans   11
Incremental expense related to acceptance of voluntary early retirement packages, amount related to cash payments and administrative fees   2
United States | Pension plans    
Defined Benefit Plan Disclosure [Line Items]    
Incremental expense related to acceptance of voluntary early retirement packages, amount related to defined benefit plans $ 0 80
United States | Pension plans | Simplification Restructuring Plan    
Defined Benefit Plan Disclosure [Line Items]    
Incremental expense related to acceptance of voluntary early retirement packages, amount related to defined benefit plans   73
United States | Post-retirement benefits | Simplification Restructuring Plan    
Defined Benefit Plan Disclosure [Line Items]    
Incremental expense related to acceptance of voluntary early retirement packages, amount related to defined benefit plans   $ 11