CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Assets
Cash and cash equivalents	$ 4.3	$ 5.4
Accounts receivable from contracts with customers:
Accounts receivable-trade	3.6	1.9
Accounts receivable-affiliate	$ 135.3	$ 122.5
Accounts Receivable, after Allowance for Credit Loss, Current, Related Party, Name [Extensible Enumeration]	us-gaap:RelatedPartyMember	us-gaap:RelatedPartyMember
Other current assets	$ 6.2	$ 7.0
Total current assets	149.4	136.8
Equity investments	87.0	90.2
Property, plant and equipment, net	3,325.4	3,229.2
Long-term receivable—affiliate	0.2	0.3
Deferred tax asset	582.6	324.4
Other noncurrent assets	6.4	8.6
Total assets	4,151.0	3,789.5
Liabilities
Accounts payable—trade	55.9	38.5
Accounts payable-affiliate	$ 33.5	$ 41.2
Accounts Payable, Current, Related Party, Name [Extensible Enumeration]	us-gaap:RelatedPartyMember	us-gaap:RelatedPartyMember
Accrued liabilities	$ 93.8	$ 105.9
Current maturities of long-term debt	22.5	12.5
Other current liabilities	13.6	12.1
Total current liabilities	219.3	210.2
Long-term debt	3,449.4	3,198.9
Deferred tax liability	0.5	0.5
Other noncurrent liabilities	16.5	16.7
Total liabilities	3,685.7	3,426.3
Partners' capital
Total Class A and Class B partners' capital	530.7	340.2
Noncontrolling interest	(65.4)	23.0
Total partners' capital	465.3	363.2
Total liabilities and partners' capital	4,151.0	3,789.5
Class A Shares
Partners' capital
Common unitholders	$ 530.7	$ 340.2