CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Operating Activities:
Net income	$ 262.2	$ 197.7
Adjustments to reconcile net income to cash provided by operations:
Depreciation and amortization	212.0	201.0
Amortization of deferred costs and other	(1.7)	11.2
Loss (gain) on sale of assets, impairments and other	(7.7)	0.1
Changes in operating assets and liabilities:
Trade and other receivables	36.7	28.4
Gas receivables and payables and product inventory	(7.5)	(1.0)
Prepayments and other assets	(1.7)	(2.5)
Trade and other payables	(20.8)	(2.0)
Other payables, affiliates	0.1	0.1
Accrued liabilities	(3.1)	(12.0)
Other liabilities	4.0	3.2
Net cash provided by operating activities	472.5	424.2
Investing Activities:
Capital expenditures	(196.4)	(150.8)
Proceeds from sale of operating assets	0.4	0.1
Advances to affiliates	(3.7)	0.0
Purchases of short-term investments	(502.9)	0.0
Net cash used in investing activities	(702.6)	(150.7)
Financing Activities:
Proceeds from long-term debt, net of issuance cost	593.5	0.0
Proceeds from borrowings on revolving credit facility	170.0	0.0
Repayments of borrowings on revolving credit facility, including financing fees	(195.0)	(0.6)
Principal payment of finance lease obligation	(0.5)	(0.4)
Advances from affiliates	4.6	0.5
Distributions paid	(100.0)	0.0
Net cash provided by (used in) financing activities	472.6	(0.5)
Increase in cash and cash equivalents	242.5	273.0
Cash and cash equivalents at beginning of period	20.1	215.6
Cash and cash equivalents at end of period	$ 262.6	$ 488.6