Consolidated Statements of Shareholders' Equity - USD ($) shares in Millions, $ in Millions	Total	Common shares	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Loss
Shares balance beginning of period (in shares) at Dec. 30, 2017		215
Balance at beginning of period at Dec. 30, 2017	$ 2,751	$ 2	$ 2,720	$ 124	$ (95)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation expense	7		7
Proceeds from employee stock purchase plan	4		4
Exercise of stock options (in shares)		1
Exercise of stock options	7		7
Changes in retirement benefit obligations, net of income tax	1				1
Unrecognized gain (loss) on interest rate swaps, net of income tax	9				9
Net income	67			67
Shares balance end of period (in shares) at Mar. 31, 2018		216
Balance at end of period at Mar. 31, 2018	2,846	$ 2	2,738	191	(85)
Shares balance beginning of period (in shares) at Dec. 30, 2017		215
Balance at beginning of period at Dec. 30, 2017	2,751	$ 2	2,720	124	(95)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Changes in retirement benefit obligations, net of income tax	26
Net income	$ 307
Shares balance end of period (in shares) at Sep. 29, 2018	217
Balance at end of period at Sep. 29, 2018	$ 3,146	$ 2	2,768	431	(55)
Shares balance beginning of period (in shares) at Mar. 31, 2018		216
Balance at beginning of period at Mar. 31, 2018	2,846	$ 2	2,738	191	(85)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation expense	10		10
Proceeds from employee stock purchase plan	6		6
Exercise of stock options (in shares)		1
Exercise of stock options	9		9
Tax withholding payments for net share-settled equity awards	(5)		(5)
Changes in retirement benefit obligations, net of income tax	25				25
Unrecognized gain (loss) on interest rate swaps, net of income tax	3				3
Net income	126			126
Shares balance end of period (in shares) at Jun. 30, 2018		217
Balance at end of period at Jun. 30, 2018	3,020	$ 2	2,758	317	(57)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation expense	3		3
Proceeds from employee stock purchase plan	$ 5		5
Exercise of stock options (in shares)	0
Exercise of stock options	$ 3		3
Tax withholding payments for net share-settled equity awards	(1)		(1)
Changes in retirement benefit obligations, net of income tax	0
Unrecognized gain (loss) on interest rate swaps, net of income tax	2				2
Net income	$ 114			114
Shares balance end of period (in shares) at Sep. 29, 2018	217
Balance at end of period at Sep. 29, 2018	$ 3,146	$ 2	2,768	431	(55)
Shares balance beginning of period (in shares) at Dec. 29, 2018		217
Balance at beginning of period at Dec. 29, 2018	3,229	$ 2	2,780	531	(84)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation expense	6		6
Proceeds from employee stock purchase plan	5		5
Exercise of stock options (in shares)		1
Exercise of stock options	6		6
Tax withholding payments for net share-settled equity awards	(2)		(2)
Changes in retirement benefit obligations, net of income tax	1				1
Unrecognized gain (loss) on interest rate swaps, net of income tax	(6)				(6)
Net income	71			71
Shares balance end of period (in shares) at Mar. 30, 2019		218
Balance at end of period at Mar. 30, 2019	3,310	$ 2	2,795	602	(89)
Shares balance beginning of period (in shares) at Dec. 29, 2018		217
Balance at beginning of period at Dec. 29, 2018	3,229	$ 2	2,780	531	(84)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Changes in retirement benefit obligations, net of income tax	5
Net income	293
Shares balance end of period (in shares) at Sep. 28, 2019		219
Balance at end of period at Sep. 28, 2019	3,557	$ 2	2,825	824	(94)
Shares balance beginning of period (in shares) at Mar. 30, 2019		218
Balance at beginning of period at Mar. 30, 2019	3,310	$ 2	2,795	602	(89)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation expense	9		9
Proceeds from employee stock purchase plan	5		5
Exercise of stock options (in shares)		1
Exercise of stock options	5		5
Tax withholding payments for net share-settled equity awards	(3)		(3)
Changes in retirement benefit obligations, net of income tax	1				1
Unrecognized gain (loss) on interest rate swaps, net of income tax	(8)				(8)
Net income	116			116
Shares balance end of period (in shares) at Jun. 29, 2019		219
Balance at end of period at Jun. 29, 2019	3,435	$ 2	2,811	718	(96)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation expense	7		7
Proceeds from employee stock purchase plan	5		5
Exercise of stock options (in shares)		0
Exercise of stock options	2		2
Changes in retirement benefit obligations, net of income tax	3				3
Unrecognized gain (loss) on interest rate swaps, net of income tax	(1)				(1)
Net income	106			106
Shares balance end of period (in shares) at Sep. 28, 2019		219
Balance at end of period at Sep. 28, 2019	$ 3,557	$ 2	$ 2,825	$ 824	$ (94)