CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Assets
Cash and cash equivalents	$ 99.6	$ 5.4
Accounts receivable from contracts with customers:
Accounts receivable-trade	3.3	1.9
Accounts receivable-affiliate	$ 109.7	$ 122.5
Accounts Receivable, after Allowance for Credit Loss, Current, Related Party, Name [Extensible Enumeration]	us-gaap:RelatedPartyMember	us-gaap:RelatedPartyMember
Other current assets	$ 1.5	$ 7.0
Total current assets	214.1	136.8
Equity investments	89.2	90.2
Property, plant and equipment, net	3,237.3	3,229.2
Long-term receivable—affiliate	0.2	0.3
Deferred tax asset	501.6	324.4
Other noncurrent assets	7.7	8.6
Total assets	4,050.1	3,789.5
Liabilities
Accounts payable—trade	38.1	38.5
Accounts payable-affiliate	$ 41.8	$ 41.2
Accounts Payable, Current, Related Party, Name [Extensible Enumeration]	us-gaap:RelatedPartyMember	us-gaap:RelatedPartyMember
Accrued liabilities	$ 88.1	$ 105.9
Current maturities of long-term debt	17.5	12.5
Other current liabilities	6.7	12.1
Total current liabilities	192.2	210.2
Long-term debt	3,442.8	3,198.9
Deferred tax liability	0.4	0.5
Other noncurrent liabilities	12.1	16.7
Total liabilities	3,647.5	3,426.3
Partners' capital
Total Class A and Class B partners' capital	464.5	340.2
Noncontrolling interest	(61.9)	23.0
Total partners' capital	402.6	363.2
Total liabilities and partners' capital	4,050.1	3,789.5
Class A Shares
Partners' capital
Common unitholders	$ 464.5	$ 340.2