Capital Accounts, Distributions (Details) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended		12 Months Ended
	May 12, 2021	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2021
Distributions to Partners [Abstract]
Cash payments made in connection with DERs		$ 7.0	$ 5.8
Forecast [Member] | First Quarter 2021 Distribution [Member]
Distributions to Partners [Abstract]
Cash distributions paid	$ 991.5
Cash payments made in connection with DERs	$ 8.1
Cash Distribution [Member] | First Quarter 2021 Distribution [Member]
Distributions to Partners [Abstract]
Distribution Per Common Unit (in dollars per unit)		$ 0.45
Cash Distribution [Member] | Forecast [Member]
Distributions to Partners [Abstract]
Distribution Per Common Unit (in dollars per unit)				$ 1.80