CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Current Assets:
Cash and cash equivalents	$ 15.3	$ 3.6
Receivables:
Trade, net	122.3	139.2
Other	11.5	14.5
Gas transportation receivables	6.2	8.8
Costs recoverable from customers	16.2	23.6
Prepayments	13.6	21.3
Other current assets	1.5	1.3
Total current assets	186.6	212.3
Property, Plant and Equipment:
Natural gas transmission and other plant	11,219.3	11,175.4
Construction work in progress	171.0	150.2
Property, plant and equipment, gross	11,390.3	11,325.6
Less—accumulated depreciation and amortization	3,015.9	2,939.8
Property, plant and equipment, net	8,374.4	8,385.8
Other Assets:
Goodwill	237.4	237.4
Gas stored underground	75.7	68.6
Other	162.0	144.6
Total other assets	475.1	450.6
Total Assets	9,036.1	9,048.7
Payables:
Trade	49.6	61.2
Affiliates	0.5	0.5
Other	8.5	9.9
Gas payables	6.8	8.2
Accrued taxes, other	38.3	58.6
Accrued interest	37.2	38.1
Accrued payroll and employee benefits	15.1	34.0
Construction retainage	18.0	20.4
Deferred income	0.9	0.5
Other current liabilities	26.4	26.0
Total current liabilities	201.3	257.4
Long-term debt and finance lease obligation	3,647.4	3,701.3
Other Liabilities and Deferred Credits:
Pension liability	25.3	24.8
Asset retirement obligation	57.0	56.4
Provision for other asset retirement	70.2	68.5
Other	89.7	78.4
Total other liabilities and deferred credits	242.2	228.1
Commitments and Contingencies
Partners’ Capital:
Partners' capital	5,029.6	4,947.1
Accumulated other comprehensive loss	(84.4)	(85.2)
Total partners’ capital	4,945.2	4,861.9
Total Liabilities and Partners' Capital	$ 9,036.1	$ 9,048.7