CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Assets
Cash and cash equivalents	$ 10.3	$ 5.4
Accounts receivable from contracts with customers:
Accounts receivable-trade	3.5	1.9
Accounts receivable-affiliate	$ 127.6	$ 122.5
Accounts Receivable, after Allowance for Credit Loss, Current, Related Party, Name [Extensible Enumeration]	us-gaap:RelatedPartyMember	us-gaap:RelatedPartyMember
Other current assets	$ 12.8	$ 7.0
Total current assets	154.2	136.8
Equity investments	88.5	90.2
Property, plant and equipment, net	3,291.8	3,229.2
Long-term receivable—affiliate	0.2	0.3
Deferred tax asset	605.2	324.4
Other noncurrent assets	7.0	8.6
Total assets	4,146.9	3,789.5
Liabilities
Accounts payable—trade	42.5	38.5
Accounts payable-affiliate	$ 44.9	$ 41.2
Accounts Payable, Current, Related Party, Name [Extensible Enumeration]	us-gaap:RelatedPartyMember	us-gaap:RelatedPartyMember
Accrued liabilities	$ 103.6	$ 105.9
Current maturities of long-term debt	20.0	12.5
Other current liabilities	9.9	12.1
Total current liabilities	220.9	210.2
Long-term debt	3,469.8	3,198.9
Deferred tax liability	0.5	0.5
Other noncurrent liabilities	13.9	16.7
Total liabilities	3,705.1	3,426.3
Partners' capital
Total Class A and Class B partners' capital	531.0	340.2
Noncontrolling interest	(89.2)	23.0
Total partners' capital	441.8	363.2
Total liabilities and partners' capital	4,146.9	3,789.5
Class A Shares
Partners' capital
Common unitholders	$ 531.0	$ 340.2