Pension and Other Post-Retirement Benefit Plans - Defined Benefit Pension Plans' Major Asset Categories and Their Associated Fair Values (Details) - USD ($) $ in Millions	Jun. 28, 2024	Jun. 30, 2023
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	157	155
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	184	185
Equity commingled/mutual funds
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets	58	66
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	58	66
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	99	89
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	99	89
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	157	155
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	157	155
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 | Net asset value
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets	$ 27	$ 30