CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Assets
Cash and cash equivalents	$ 5.4	$ 3.1
Accounts receivable from contracts with customers:
Accounts receivable-trade	1.9	0.3
Accounts receivable-affiliate	$ 122.5	$ 122.7
Accounts Receivable, after Allowance for Credit Loss, Current, Related Party, Name [Extensible Enumeration]	us-gaap:RelatedPartyMember	us-gaap:RelatedPartyMember
Other current assets	$ 7.0	$ 6.2
Total current assets	136.8	132.3
Equity investments	90.2	93.9
Property, plant and equipment, net	3,229.2	3,172.8
Long-term receivable—affiliate	0.3	0.7
Deferred tax asset	324.4	177.2
Other noncurrent assets	8.6	11.3
Total assets	3,789.5	3,588.2
Liabilities
Accounts payable—trade	38.5	35.0
Accounts payable-affiliate	$ 41.2	$ 27.7
Accounts Payable, Current, Related Party, Name [Extensible Enumeration]	us-gaap:RelatedPartyMember	us-gaap:RelatedPartyMember
Accrued liabilities	$ 105.9	$ 82.9
Current maturities of long-term debt	12.5	2.5
Other current liabilities	12.1	11.4
Total current liabilities	210.2	159.5
Long-term debt	3,198.9	2,883.1
Deferred tax liability	0.5	0.5
Other noncurrent liabilities	16.7	16.1
Total liabilities	3,426.3	3,059.2
Partners' capital
Total Class A and Class B partners' capital	340.2	245.1
Noncontrolling interest	23.0	283.9
Total partners' capital	363.2	529.0
Total liabilities and partners' capital	3,789.5	3,588.2
Class A Shares
Partners' capital
Common unitholders	$ 340.2	$ 245.1