Retirement Plans Fair Value of Defined Benefit Plans' Assets by Asset Fair Value Hierarchy Level (Details) - USD ($) $ in Millions	Dec. 28, 2024	Dec. 30, 2023
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 89	$ 760
Domestic Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	16	18
International equities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	1
International Mutual Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	11
Domestic Corporate Debt Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	5	116
International Corporate Debt Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	16
U.S. Governmental Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	2
Securities at Fair Values, Excluding NAV
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	21	167
Other
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	3
Level 1 | Domestic Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	16	18
Level 1 | International equities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	1
Level 1 | International Mutual Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	11
Level 1 | Domestic Corporate Debt Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Level 1 | International Corporate Debt Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Level 1 | U.S. Governmental Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
Level 1 | Securities at Fair Values, Excluding NAV
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	16	30
Level 1 | Other
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0
Level 2 | Domestic Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Level 2 | International equities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Level 2 | International Mutual Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Level 2 | Domestic Corporate Debt Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	5	116
Level 2 | International Corporate Debt Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	16
Level 2 | U.S. Governmental Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	2
Level 2 | Securities at Fair Values, Excluding NAV
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	5	137
Level 2 | Other
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	3
Level 3 | Domestic Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Level 3 | International equities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Level 3 | International Mutual Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Level 3 | Domestic Corporate Debt Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Level 3 | International Corporate Debt Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Level 3 | U.S. Governmental Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Level 3 | Securities at Fair Values, Excluding NAV
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Level 3 | Other
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0
Fair Value Hierarchy | Common collective trust funds, Cash Equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	68	286
Fair Value Hierarchy | Common collective trust funds, Domestic Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	72
Fair Value Hierarchy | Common collective trust funds, International Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	20
Fair Value Hierarchy | Common collective trust funds, Treasury STRIPS
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	67
Fair Value Hierarchy | Common collective trust funds, U.S. Governmental Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	148
Fair Value Hierarchy | Securities Valued at NAV
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 68	$ 593