CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Current Assets:
Cash and cash equivalents	$ 488.6	$ 215.6
Receivables:
Trade, net	122.1	148.4
Other	24.1	25.4
Gas transportation receivables	6.1	22.0
Gas stored underground	4.0	41.6
Other current assets	36.8	32.4
Total current assets	681.7	485.4
Property, Plant and Equipment:
Natural gas transmission and other plant	12,826.3	12,616.7
Construction work in progress	160.7	187.6
Property, plant and equipment, gross	12,987.0	12,804.3
Less—accumulated depreciation and amortization	4,476.9	4,288.3
Property, plant and equipment, net	8,510.1	8,516.0
Other Assets:
Goodwill	237.4	237.4
Gas stored underground	91.0	153.5
Other	176.7	177.6
Total other assets	505.1	568.5
Total Assets	9,696.9	9,569.9
Payables:
Trade	54.1	70.7
Affiliates	3.2	2.6
Other	18.8	17.4
Gas transportation payables	7.3	41.2
Accrued taxes, other	62.1	62.8
Accrued interest	33.9	33.9
Accrued payroll and employee benefits	27.3	38.3
Regulatory liabilities	17.4	55.1
Asset retirement obligations	16.5	17.3
Other current liabilities	42.1	33.4
Total current liabilities	282.7	372.7
Long-term debt and finance lease obligation	3,235.2	3,233.4
Other Liabilities and Deferred Credits:
Pension liability	7.9	8.8
Asset retirement obligations	63.2	53.9
Provision for other asset retirement	95.6	93.2
Other	111.0	105.7
Total other liabilities and deferred credits	277.7	261.6
Commitments and Contingencies
Partners' Capital:
Partners' capital	5,979.4	5,781.7
Accumulated other comprehensive loss	(78.1)	(79.5)
Total partners' capital	5,901.3	5,702.2
Total Liabilities and Partners' Capital	$ 9,696.9	$ 9,569.9