CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Current Assets:
Cash and cash equivalents	$ 39.1	$ 2.9
Receivables:
Trade, net	126.2	115.1
Other	31.4	23.4
Gas transportation receivables	8.0	6.6
Gas stored underground	26.1	2.8
Prepayments	21.4	18.5
Other current assets	7.1	4.2
Total current assets	259.3	173.5
Property, Plant and Equipment:
Natural gas transmission and other plant	12,248.6	11,964.1
Construction work in progress	239.5	184.2
Property, plant and equipment, gross	12,488.1	12,148.3
Less—accumulated depreciation and amortization	3,947.0	3,598.5
Property, plant and equipment, net	8,541.1	8,549.8
Other Assets:
Goodwill	237.4	237.4
Gas stored underground	114.0	101.9
Other	179.6	167.3
Total other assets	531.0	506.6
Total Assets	9,331.4	9,229.9
Payables:
Trade	31.1	43.6
Affiliates	1.7	9.9
Other	20.3	9.6
Gas transportation payables	20.0	10.9
Accrued taxes, other	65.8	70.3
Accrued interest	32.7	33.1
Accrued payroll and employee benefits	37.4	34.5
Construction retainage	16.6	11.5
Regulatory liabilities	12.7	14.1
Other current liabilities	21.4	29.4
Total current liabilities	259.7	266.9
Long-term debt and finance lease obligation	3,334.5	3,460.7
Other Liabilities and Deferred Credits:
Pension liability	5.6	18.0
Asset retirement obligations	61.5	54.9
Provision for other asset retirement	88.2	81.6
Other	112.8	98.7
Total other liabilities and deferred credits	268.1	253.2
Commitments and Contingencies
Partners' Capital:
Partners' capital	5,541.7	5,328.9
Accumulated other comprehensive loss	(72.6)	(79.8)
Total partners' capital	5,469.1	5,249.1
Total Liabilities and Partners' Capital	$ 9,331.4	$ 9,229.9