Retirement Plans Fair Value of Defined Benefit Plans' Assets by Asset Fair Value Hierarchy Level (Details) - USD ($) $ in Millions	Jan. 01, 2022	Jan. 02, 2021
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 1,103	$ 1,112
Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2	7
Domestic Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	44	56
International equities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2	2
International Mutual Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	26	29
Domestic Corporate Debt Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	286	292
International Corporate Debt Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	45	36
U.S. Governmental Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	7	53
Other Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		3
Securities at Fair Values, Excluding NAV
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	412	478
Level 1 | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2	7
Level 1 | Domestic Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	44	56
Level 1 | International equities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2	2
Level 1 | International Mutual Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	26	29
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	0
Level 1 | Other 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	74	94
Level 2 | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	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	286	292
Level 2 | International Corporate Debt Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	45	36
Level 2 | U.S. Governmental Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	7	53
Level 2 | Other Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		3
Level 2 | Securities at Fair Values, Excluding NAV
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	338	384
Level 3 | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
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 | Other Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0
Level 3 | Securities at Fair Values, Excluding NAV
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fair Value Hierarchy | Common collective trust funds, Cash Equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	24	11
Fair Value Hierarchy | Common collective trust funds, Domestic Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	219	240
Fair Value Hierarchy | Common collective trust funds, International Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	49	62
Fair Value Hierarchy | Common collective trust funds, Treasury STRIPS
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	303	321
Fair Value Hierarchy | Common collective trust funds, U.S. Governmental Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	96
Fair Value Hierarchy | Securities Valued at NAV
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 691	$ 634