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. 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 (loss) 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 (loss) 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 (loss) 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	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 (loss) 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)
Shares balance beginning of period (in shares) at Dec. 28, 2019		220
Balance at beginning of period at Dec. 28, 2019	3,709	$ 2	2,845	916	(54)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation expense	7		7
Proceeds from employee stock purchase plan	6		6
Exercise of stock options (in shares)		0
Exercise of stock options	1		1
Tax withholding payments for net share-settled equity awards	(2)		(2)
Adoption of ASU 2016-13 (Note 2 and 7)	(1)			(1)
Unrecognized gain (loss) on interest rate swaps, net of income tax	(6)				(6)
Net (loss) income	(132)			(132)
Shares balance end of period (in shares) at Mar. 28, 2020		220
Balance at end of period at Mar. 28, 2020	3,582	$ 2	2,857	783	(60)
Shares balance beginning of period (in shares) at Dec. 28, 2019		220
Balance at beginning of period at Dec. 28, 2019	3,709	$ 2	2,845	916	(54)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Changes in retirement benefit obligations, net of income tax	1
Net (loss) income	(216)
Shares balance end of period (in shares) at Sep. 26, 2020		221
Balance at end of period at Sep. 26, 2020	3,515	$ 2	2,886	684	(57)
Shares balance beginning of period (in shares) at Mar. 28, 2020		220
Balance at beginning of period at Mar. 28, 2020	3,582	$ 2	2,857	783	(60)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation expense	12		12
Stock Issued During Period, Shares, Employee Stock Purchase Plans		1
Proceeds from employee stock purchase plan	5		5
Tax withholding payments for net share-settled equity awards	(3)		(3)
Series A Convertible Preferred Stock Dividends	(5)			(5)
Changes in retirement benefit obligations, net of income tax	1				1
Net (loss) income	(92)			(92)
Shares balance end of period (in shares) at Jun. 27, 2020		221
Balance at end of period at Jun. 27, 2020	3,500	$ 2	2,871	686	(59)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation expense	10		10
Proceeds from employee stock purchase plan	4		4
Exercise of stock options (in shares)		0
Exercise of stock options	1		1
Series A Convertible Preferred Stock Dividends	(10)			(10)
Changes in retirement benefit obligations, net of income tax	0
Unrecognized gain (loss) on interest rate swaps, net of income tax	2				2
Net (loss) income	8			8
Shares balance end of period (in shares) at Sep. 26, 2020		221
Balance at end of period at Sep. 26, 2020	$ 3,515	$ 2	$ 2,886	$ 684	$ (57)