Changes in Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of year	$ 3,229	$ 2,751	$ 2,538
Balance at end of year	3,709	3,229	2,751
Retirement benefit obligations
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of year	(97)	(103)	(119)
Other comprehensive (loss) income before reclassifications	44	6	1
Balance at end of year	(52)	(97)	(103)
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	60	9	22
Income tax (benefit) provision	15	3	6
Current period comprehensive income, net of tax	45	6	16
Amortization of net loss
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Amounts reclassified from other comprehensive loss, before tax	4	3	4
Settlements
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Settlements	12	0	18
Interest rate swaps
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of year	13	8	0
Other comprehensive (loss) income before reclassifications	(14)	10	11
Amounts reclassified from other comprehensive loss, before tax	(6)	(3)	2
Total before income tax	(20)	7	13
Income tax (benefit) provision	(5)	2	5
Current period comprehensive income, net of tax	(15)	5	8
Balance at end of year	(2)	13	8
Accumulated other comprehensive loss
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of year	(84)	(95)	(119)
Balance at end of year	$ (54)	$ (84)	$ (95)