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Pensions and Other Post-retirement Benefit Plans - Defined Benefit Pension Plans' Major Asset Categories and Their Associated Fair Values (Details) - USD ($)
$ in Millions
Jul. 02, 2021
Jul. 03, 2020
Defined Benefit Plan Disclosure [Line Items]    
Defined benefit plan, fair value of plan assets $ 196 $ 215
Level 1    
Defined Benefit Plan Disclosure [Line Items]    
Defined benefit plan, fair value of plan assets 0 12
Level 2    
Defined Benefit Plan Disclosure [Line Items]    
Defined benefit plan, fair value of plan assets 196 203
Level 3    
Defined Benefit Plan Disclosure [Line Items]    
Defined benefit plan, fair value of plan assets 0 0
Equity commingled/mutual funds    
Defined Benefit Plan Disclosure [Line Items]    
Defined benefit plan, fair value of plan assets 73 72
Equity commingled/mutual funds | Level 1    
Defined Benefit Plan Disclosure [Line Items]    
Defined benefit plan, fair value of plan assets 0 0
Equity commingled/mutual funds | Level 2    
Defined Benefit Plan Disclosure [Line Items]    
Defined benefit plan, fair value of plan assets 73 72
Equity commingled/mutual funds | Level 3    
Defined Benefit Plan Disclosure [Line Items]    
Defined benefit plan, fair value of plan assets 0 0
Fixed income commingled/mutual funds    
Defined Benefit Plan Disclosure [Line Items]    
Defined benefit plan, fair value of plan assets 123 131
Fixed income commingled/mutual funds | Level 1    
Defined Benefit Plan Disclosure [Line Items]    
Defined benefit plan, fair value of plan assets 0 0
Fixed income commingled/mutual funds | Level 2    
Defined Benefit Plan Disclosure [Line Items]    
Defined benefit plan, fair value of plan assets 123 131
Fixed income commingled/mutual funds | Level 3    
Defined Benefit Plan Disclosure [Line Items]    
Defined benefit plan, fair value of plan assets 0 0
Cash equivalents and short-term investments    
Defined Benefit Plan Disclosure [Line Items]    
Defined benefit plan, fair value of plan assets   12
Cash equivalents and short-term investments | Level 1    
Defined Benefit Plan Disclosure [Line Items]    
Defined benefit plan, fair value of plan assets   12
Cash equivalents and short-term investments | Level 2    
Defined Benefit Plan Disclosure [Line Items]    
Defined benefit plan, fair value of plan assets   0
Cash equivalents and short-term investments | Level 3    
Defined Benefit Plan Disclosure [Line Items]    
Defined benefit plan, fair value of plan assets   $ 0
Real estate investment trust | Net asset value    
Defined Benefit Plan Disclosure [Line Items]    
Defined benefit plan, fair value of plan assets $ 30