Distributions of Available Cash - Quarterly Distributions Per Common Unit Declared and Paid (Details) - $ / shares	3 Months Ended
Sep. 26, 2020	Jun. 27, 2020	Mar. 28, 2020	Dec. 28, 2019	Sep. 28, 2019	Jun. 29, 2019	Mar. 30, 2019	Dec. 29, 2018	Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 30, 2017
Distributions Made To Members Or Limited Partners [Abstract]
Distributions paid (in dollars per unit)	$ 0.3000	$ 0.3000	$ 0.6000	$ 0.6000	$ 0.6000	$ 0.6000	$ 0.6000	$ 0.6000	$ 0.6000	$ 0.6000	$ 0.6000	$ 0.6000
Distributions declared (in dollars per unit)	$ 0.3000	$ 0.3000	$ 0.6000	$ 0.6000	$ 0.6000	$ 0.6000	$ 0.6000	$ 0.6000	$ 0.6000	$ 0.6000	$ 0.6000	$ 0.6000

Per unit of ownership amount of cash distributions paid to unit-holder of a limited liability company (LLC).

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770

Name:	us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberDistributionsPaidPerUnit
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration