Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Includes, but is not limited to, one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, and relocating employees, and termination benefits associated with an ongoing benefit arrangement. Excludes expenses associated with special or contractual termination benefits, a discontinued operation or an asset retirement obligation.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
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Name:	us-gaap_BusinessExitCosts1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Restructuring Charges - Schedule of Restructuring Charges (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended		12 Months Ended
	Jun. 26, 2021	Jun. 26, 2021	Jun. 27, 2020	Dec. 26, 2020	Dec. 28, 2019	Dec. 29, 2018
Restructuring Cost and Reserve [Line Items]
Employee severance and benefits		$ 24	$ 8
Total	$ 2	33	9
Restructuring Charges		8	1	$ 2	$ 6	$ 19
Employee Severance and Benefits
Restructuring Cost and Reserve [Line Items]
Employee severance and benefits		8	1
Restructuring Charges		32		25	20	27
Continued Operations [Member]
Restructuring Cost and Reserve [Line Items]
Employee severance and benefits				2	5	11
Facility Restructuring					1	1
Transition charges						7
Total				2	6	19
Restructuring Charges		8	1
Discontinued Operations [Member]
Restructuring Cost and Reserve [Line Items]
Employee severance and benefits	2			23	15	16
Facility Restructuring		1			1	1
Total				$ 23	$ 16	$ 17
Restructuring Charges	$ 2	$ 25	$ 8