CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Current Assets:
Cash and cash equivalents	$ 499.2	$ 117.9
Receivables:
Trade, net	220.5	210.7
Other	27.6	21.4
Gas transportation receivables	22.4	7.4
Prepayments	30.2	25.2
Short-term investments	351.3	0.0
Other current assets	28.5	18.5
Total current assets	1,179.7	401.1
Property, Plant and Equipment:
Property, plant and equipment, gross	14,124.3	13,857.8
Less—accumulated depreciation and amortization	5,352.5	5,045.1
Property, plant and equipment, net	8,771.8	8,812.7
Other Assets:
Goodwill	237.4	237.4
Gas stored underground	100.0	98.3
Other	224.5	229.9
Total other assets	561.9	565.6
Total Assets	10,513.4	9,779.4
Payables:
Trade	140.5	100.9
Gas transportation payables	14.9	11.7
Accrued taxes, other	73.3	67.0
Accrued interest	49.8	46.7
Accrued payroll and employee benefits	53.1	48.6
Current portion of long-term debt	549.6	0.0
Regulatory liabilities	29.1	18.3
Other current liabilities	41.1	30.2
Total current liabilities	981.8	345.6
Long-term debt and finance lease obligation	3,231.8	3,234.4
Other Liabilities and Deferred Credits:
Asset retirement obligations	71.6	70.0
Provision for other asset retirement	108.2	103.6
Total other liabilities and deferred credits	307.2	293.4
Commitments and Contingencies
Partners' Capital:
Partners' capital	6,073.3	5,978.6
Accumulated other comprehensive loss	(80.7)	(72.6)
Total partners' capital	5,992.6	5,906.0
Total Liabilities and Partners' Capital	10,513.4	9,779.4
Affiliates
Payables:
Payables	0.5	0.5
Other Liabilities and Deferred Credits:
Other	6.2	4.8
Nonrelated Party
Payables:
Payables	29.9	21.7
Other Liabilities and Deferred Credits:
Other	121.2	115.0
Pipelines, storage and other plant
Property, Plant and Equipment:
Property, plant and equipment, gross	13,835.1	13,667.7
Construction work in progress
Property, Plant and Equipment:
Property, plant and equipment, gross	$ 289.2	$ 190.1