Pensions and Other Post-retirement Benefit Plans - Defined Benefit Pension Plans' Major Asset Categories and Their Associated Fair Values (Details) - USD ($) $ in Millions	Jul. 01, 2022	Jul. 02, 2021
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	158	196
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	189	226
Equity commingled/mutual funds
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets	63	73
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	63	73
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	95	123
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	95	123
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	158	196
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	158	196
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	$ 31	$ 30