CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Current Assets:
Cash and cash equivalents	$ 265.0	$ 215.6
Receivables:
Trade, net	169.2	148.4
Other	24.6	25.4
Gas transportation receivables	6.7	22.0
Gas stored underground	7.5	41.6
Prepayments	29.3	23.7
Other current assets	9.0	8.7
Total current assets	511.3	485.4
Property, Plant and Equipment:
Natural gas transmission and other plant	13,156.7	12,616.7
Construction work in progress	235.4	187.6
Property, plant and equipment, gross	13,392.1	12,804.3
Less—accumulated depreciation and amortization	4,574.3	4,288.3
Property, plant and equipment, net	8,817.8	8,516.0
Other Assets:
Goodwill	237.4	237.4
Gas stored underground	99.1	153.5
Other	211.4	177.6
Total other assets	547.9	568.5
Total Assets	9,877.0	9,569.9
Payables:
Trade	113.4	70.7
Affiliates	3.3	2.6
Other	17.1	17.4
Gas transportation payables	7.3	41.2
Accrued taxes, other	89.4	62.8
Accrued interest	39.4	33.9
Accrued payroll and employee benefits	39.9	38.3
Regulatory liabilities	14.2	55.1
Asset retirement obligations	19.1	17.3
Other current liabilities	45.0	33.4
Total current liabilities	388.1	372.7
Long-term debt and finance lease obligation	3,236.1	3,233.4
Other Liabilities and Deferred Credits:
Pension liability	6.9	8.8
Asset retirement obligations	60.4	53.9
Provision for other asset retirement	96.7	93.2
Other	118.1	105.7
Total other liabilities and deferred credits	282.1	261.6
Commitments and Contingencies
Partners' Capital:
Partners' capital	6,048.6	5,781.7
Accumulated other comprehensive loss	(77.9)	(79.5)
Total partners' capital	5,970.7	5,702.2
Total Liabilities and Partners' Capital	$ 9,877.0	$ 9,569.9