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Partners' Capital - Cash Distributions (Details) - Cash Distributions - USD ($) $ / shares in Units, $ in Millions						12 Months Ended
	Feb. 04, 2022	Nov. 05, 2021	Aug. 06, 2021	May 07, 2021	Feb. 05, 2021	Dec. 31, 2021
Cash Distributions
Total distribution	$ 52.3	$ 52.0	$ 52.1	$ 52.0	$ 52.0	$ 208.1
Phantom Unitholders
Cash Distributions
Total distribution	$ 1.2	$ 1.0	$ 1.1	$ 1.1	$ 1.1	$ 4.3
Limited partner | Common units
Cash Distributions
Distribution per limited partner unit (in dollars per share)	$ 0.525	$ 0.525	$ 0.525	$ 0.525	$ 0.525	$ 2.10
Total distribution	$ 51.1	$ 51.0	$ 51.0	$ 50.9	$ 50.9	$ 203.8

X

- Definition

Amount of cash distribution paid to unit-holder of limited liability company (LLC).

+ References

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

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- Definition

Per unit of ownership amount of cash distributions paid to unit-holder of a limited partnership (LP).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
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