Earnings Per Unit (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Numerator for basic and diluted earnings per limited partner unit:
Net income (loss)	$ 99.9	$ 14.6	$ 94.7	$ (96.2)
Net loss attributable to noncontrolling interest	(3.1)	(1.1)	(18.5)	(1.1)
Net income (loss) attributable to partners	103.0	15.7	113.2	(95.1)
General partners' interest in net income (loss)	2.1	0.3	2.3	(1.9)
Non-vested share based payments	0.1	0.2	0.1
Net income (loss) attributable to limited partners	$ 100.8	$ 15.2	$ 110.8	$ (93.2)
Denominator for earnings per limited partner unit:
Basic weighted average limited partner units outstanding	80,172,810	79,384,878	80,046,930	79,277,719
Effect of dilutive securities:
Incremental units	104,673	1,076,722	101,589
Diluted weighted average limited partner units outstanding	80,277,483	80,461,600	80,148,519	79,277,719
Limited partners' interest net income (loss) per unit:
Limited partners' interest basic net income (loss) per unit	$ 1.26	$ 0.19	$ 1.38	$ (1.18)
Limited partners' interest diluted net income (loss) per unit	$ 1.26	$ 0.19	$ 1.38	$ (1.18)