Changes in Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 29, 2019	Jun. 30, 2018	Jun. 29, 2019	Jun. 30, 2018	Dec. 29, 2018
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Incremental pension plan contribution					$ 35
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	$ 3,310	$ 2,846	$ 3,229	$ 2,751	2,751
Balance at end of period	3,435	3,020	3,435	3,020	3,229
Retirement benefit obligations
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(96)	(102)	(97)	(103)	(103)
Total before income tax	1	34	2	35
Income tax (benefit) provision	0	9	0	9
Current period comprehensive (loss) income, net of tax	1	25	2	26
Balance at end of period	(95)	(77)	(95)	(77)	(97)
Amortization of net loss
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Amortization of net loss	1	1	2	2
Pension remeasurement
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Pension remeasurement	0	33	0	33
Interest rate swap
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	7	17	13	8	8
Change in fair value of interest rate swaps	(8)	5	(14)	17
Amortization of net loss	(2)	0	(4)	0
Total before income tax	(10)	5	(18)	17
Income tax (benefit) provision	(2)	2	(4)	5
Current period comprehensive (loss) income, net of tax	(8)	3	(14)	12
Balance at end of period	(1)	20	(1)	20	13
Accumulated Other Comprehensive Loss
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(89)	(85)	(84)	(95)	(95)
Balance at end of period	$ (96)	$ (57)	$ (96)	$ (57)	$ (84)