Changes in Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 02, 2021	Dec. 28, 2019	Dec. 29, 2018
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of year	$ 3,709	$ 3,229	$ 2,751
Balance at end of year	3,530	3,709	3,229
Retirement benefit obligations
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of year	(52)	(97)	(103)
Other comprehensive income before reclassifications	29	44	6
Balance at end of year	(29)	(52)	(97)
Accumulated Defined Benefit Plans Adjustment Including Portion Attributable to Noncontrolling Interest [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Total before income tax	30	60	9
Income tax (benefit) provision	7	15	3
Current period comprehensive income, net of tax	23	45	6
Amortization of net loss
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Amounts reclassified from other comprehensive loss, before tax	1	4	3
Settlements
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Settlements	0	12	0
Interest rate swaps
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of year	(2)	13	8
Other comprehensive income before reclassifications	(11)	(14)	10
Amounts reclassified from other comprehensive loss, before tax	6	(6)	(3)
Total before income tax	(5)	(20)	7
Income tax (benefit) provision	(2)	(5)	2
Current period comprehensive income, net of tax	(3)	(15)	5
Balance at end of year	(5)	(2)	13
Accumulated other comprehensive loss
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of year	(54)	(84)	(95)
Balance at end of year	$ (34)	$ (54)	$ (84)