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Pension and Other Post-Retirement Benefit Plans - Defined Benefit Pension Plans' Major Asset Categories and Their Associated Fair Values (Details) - USD ($)
$ in Millions
Jun. 30, 2023
Jul. 01, 2022
Level 1    
Defined Benefit Plan Disclosure [Line Items]    
Total investments at fair value $ 0 $ 0
Level 2    
Defined Benefit Plan Disclosure [Line Items]    
Total investments at fair value 155 158
Level 3    
Defined Benefit Plan Disclosure [Line Items]    
Total investments at fair value 0 0
Net asset value    
Defined Benefit Plan Disclosure [Line Items]    
Total investments at fair value 185 189
Equity commingled/mutual funds    
Defined Benefit Plan Disclosure [Line Items]    
Defined benefit plan, fair value of plan assets 66 63
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 66 63
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 89 95
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 89 95
Fixed income commingled/mutual funds | Level 3    
Defined Benefit Plan Disclosure [Line Items]    
Defined benefit plan, fair value of plan assets 0 0
Net plan assets subject to leveling    
Defined Benefit Plan Disclosure [Line Items]    
Defined benefit plan, fair value of plan assets 155 158
Net plan assets subject to leveling | Level 1    
Defined Benefit Plan Disclosure [Line Items]    
Defined benefit plan, fair value of plan assets 0 0
Net plan assets subject to leveling | Level 2    
Defined Benefit Plan Disclosure [Line Items]    
Defined benefit plan, fair value of plan assets 155 158
Net plan assets subject to leveling | Level 3    
Defined Benefit Plan Disclosure [Line Items]    
Defined benefit plan, fair value of plan assets 0 0
Real estate investment trust at net asset value | Level 1    
Defined Benefit Plan Disclosure [Line Items]    
Defined benefit plan, fair value of plan assets
Real estate investment trust at net asset value | Level 2    
Defined Benefit Plan Disclosure [Line Items]    
Defined benefit plan, fair value of plan assets
Real estate investment trust at net asset value | Level 3    
Defined Benefit Plan Disclosure [Line Items]    
Defined benefit plan, fair value of plan assets
Real estate investment trust at net asset value | Net asset value    
Defined Benefit Plan Disclosure [Line Items]    
Defined benefit plan, fair value of plan assets $ 30 $ 31