CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Current Assets:
Cash and cash equivalents	$ 335.5	$ 215.6
Receivables:
Trade, net	134.2	148.4
Other	24.1	25.4
Gas transportation receivables	9.0	22.0
Gas stored underground	1.8	41.6
Other current assets	23.9	32.4
Total current assets	528.5	485.4
Property, Plant and Equipment:
Natural gas transmission and other plant	12,765.1	12,616.7
Construction work in progress	158.5	187.6
Property, plant and equipment, gross	12,923.6	12,804.3
Less—accumulated depreciation and amortization	4,378.7	4,288.3
Property, plant and equipment, net	8,544.9	8,516.0
Other Assets:
Goodwill	237.4	237.4
Gas stored underground	98.3	153.5
Other	176.3	177.6
Total other assets	512.0	568.5
Total Assets	9,585.4	9,569.9
Payables:
Trade	47.1	70.7
Affiliates	2.8	2.6
Other	21.5	17.4
Gas transportation payables	6.4	41.2
Accrued taxes, other	35.8	62.8
Accrued interest	39.4	33.9
Accrued payroll and employee benefits	22.5	38.3
Regulatory liabilities	21.4	55.1
Asset retirement obligations	16.9	17.3
Other current liabilities	40.1	33.4
Total current liabilities	253.9	372.7
Long-term debt and finance lease obligation	3,234.3	3,233.4
Other Liabilities and Deferred Credits:
Pension liability	8.7	8.8
Asset retirement obligations	62.7	53.9
Provision for other asset retirement	94.9	93.2
Other	109.1	105.7
Total other liabilities and deferred credits	275.4	261.6
Commitments and Contingencies
Partners' Capital:
Partners' capital	5,900.7	5,781.7
Accumulated other comprehensive loss	(78.9)	(79.5)
Total partners' capital	5,821.8	5,702.2
Total Liabilities and Partners' Capital	$ 9,585.4	$ 9,569.9