Changes in Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Jul. 02, 2016	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of year		$ 2,751	$ 2,538	$ 1,873
Balance at end of year		3,229	2,751	2,538
Accumulated defined benefit plans adjustment attributable to parent
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of year		(103)	(119)	(74)
Other comprehensive income (loss) before reclassifications		6	1	(64)
Total before income tax		9	22	(74)
Income tax provision		3	6	(29)
Current period comprehensive income, net of tax		6	16	(45)
Balance at end of year		(97)	(103)	(119)
Amortization of net loss
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Amounts reclassified from other comprehensive loss, before tax		3	4	8
Settlements
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Amounts reclassified from other comprehensive loss, before tax		0	18	4
Prior year correction
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Amounts reclassified from other comprehensive loss, before tax	$ (22)	0	0	(22)
Accumulated net gain (loss) from cash flow hedges attributable to parent
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of year		8	0	0
Other comprehensive income (loss) before reclassifications		10	11	0
Amounts reclassified from other comprehensive loss, before tax		(3)	2	0
Total before income tax		7	13	0
Income tax provision		2	5	0
Current period comprehensive income, net of tax		5	8	0
Balance at end of year		13	8	0
Accumulated other comprehensive loss
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of year		(95)	(119)	(74)
Balance at end of year		$ (84)	$ (95)	$ (119)