Changes in Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 28, 2024	Dec. 30, 2023	Dec. 31, 2022
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of year	$ 4,749	$ 3,961	$ 3,735
Loss on pension settlement	(124)	0	0
Balance at end of year	4,528	4,749	3,961
Tax effects	45
Stranded tax effects	44
Retirement benefit obligations
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of year	(116)	(73)	(19)
Other comprehensive income (loss) before reclassifications	92	(55)	(73)
Balance at end of year	42	(116)	(73)
Settlements
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Loss on pension settlement	124	0	0
Accumulated Defined Benefit Plans Adjustment Including Portion Attributable to Noncontrolling Interest
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Total before income tax	211	(58)	(73)
Income tax provision	53	(15)	(19)
Current year comprehensive income (loss), net of tax	158	(43)	(54)
Amortization of net loss
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Amortization of net loss	(5)	(3)	0
Interest rate swap
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of year	1	0	0
Other comprehensive income (loss) before reclassifications	0	1	0
Amortization of net loss	0	0	0
Total before income tax	0	1	0
Income tax provision	0	0	0
Current year comprehensive income (loss), net of tax	0	1	0
Balance at end of year	1	1	0
Accumulated other comprehensive loss
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of year	(115)	(73)	(19)
Balance at end of year	$ 43	$ (115)	$ (73)