CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Current Assets:
Cash and cash equivalents	$ 67.2	$ 3.6
Receivables:
Trade, net	106.5	139.2
Other	11.5	14.5
Gas transportation receivables	7.4	8.8
Costs recoverable from customers	10.1	23.6
Prepayments	22.8	21.3
Other current assets	6.5	1.3
Total current assets	232.0	212.3
Property, Plant and Equipment:
Natural gas transmission and other plant	11,289.3	11,175.4
Construction work in progress	192.3	150.2
Property, plant and equipment, gross	11,481.6	11,325.6
Less—accumulated depreciation and amortization	3,095.5	2,939.8
Property, plant and equipment, net	8,386.1	8,385.8
Other Assets:
Goodwill	237.4	237.4
Gas stored underground	85.0	68.6
Other	160.6	144.6
Total other assets	483.0	450.6
Total Assets	9,101.1	9,048.7
Payables:
Trade	43.1	61.2
Affiliates	3.6	0.5
Other	16.4	9.9
Gas payables	8.7	8.2
Accrued taxes, other	61.2	58.6
Accrued interest	40.4	38.1
Accrued payroll and employee benefits	25.1	34.0
Construction retainage	13.1	20.4
Deferred income	1.2	0.5
Other current liabilities	24.7	26.0
Total current liabilities	237.5	257.4
Long-term debt and finance lease obligation	3,618.8	3,701.3
Other Liabilities and Deferred Credits:
Pension liability	23.6	24.8
Asset retirement obligation	57.8	56.4
Provision for other asset retirement	72.2	68.5
Other	93.8	78.4
Total other liabilities and deferred credits	247.4	228.1
Commitments and Contingencies
Partners’ Capital:
Partners' capital	5,079.8	4,947.1
Accumulated other comprehensive loss	(82.4)	(85.2)
Total partners’ capital	4,997.4	4,861.9
Total Liabilities and Partners' Capital	$ 9,101.1	$ 9,048.7