CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Assets
Cash and cash equivalents	$ 3.0	$ 3.1
Accounts receivable-affiliate:
From contracts with customers	$ 110.3	$ 123.0
Accounts Receivable, after Allowance for Credit Loss, Current, Related and Nonrelated Party Status [Extensible Enumeration]	us-gaap:RelatedPartyMember	us-gaap:RelatedPartyMember
Other current assets	$ 0.8	$ 6.2
Total current assets	114.1	132.3
Equity investments	92.8	93.9
Property, plant and equipment, net	3,188.3	3,172.8
Long-term receivable—affiliate	0.5	0.7
Deferred tax asset	254.0	177.2
Other noncurrent assets	10.0	11.3
Total assets	3,659.7	3,588.2
Liabilities
Accounts payable—trade	27.5	35.0
Accounts payable-affiliate	$ 23.6	$ 27.7
Accounts Payable, Current, Related and Nonrelated Party Status [Extensible Enumeration]	us-gaap:RelatedPartyMember	us-gaap:RelatedPartyMember
Accrued liabilities	$ 82.7	$ 82.9
Current maturities of long-term debt	7.5	2.5
Other current liabilities	7.5	11.4
Total current liabilities	148.8	159.5
Long-term debt	3,061.2	2,883.1
Deferred tax liability	0.4	0.5
Other noncurrent liabilities	14.5	16.1
Total liabilities	3,224.9	3,059.2
Partners' capital
Total Class A and Class B partners' capital	302.1	245.1
Noncontrolling interest	132.7	283.9
Total partners' capital	434.8	529.0
Total liabilities and partners' capital	3,659.7	3,588.2
Class A Shares
Partners' capital
Common unitholders	$ 302.1	$ 245.1