CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Current Assets:
Cash and cash equivalents	$ 27.0	$ 17.6
Receivables:
Trade, net	89.4	116.8
Other	32.9	16.6
Gas transportation receivables	8.3	4.6
Costs recoverable from customers	11.1	0.0
Prepayments	25.9	17.9
Other current assets	0.9	7.1
Total current assets	195.5	180.6
Property, Plant and Equipment:
Natural gas transmission and other plant	10,952.6	10,467.1
Construction work in progress	258.9	416.5
Property, plant and equipment, gross	11,211.5	10,883.6
Less—accumulated depreciation and amortization	2,863.3	2,621.1
Property, plant and equipment, net	8,348.2	8,262.5
Other Assets:
Goodwill	237.4	237.4
Gas stored underground	81.7	86.3
Other	138.5	139.8
Total other assets	457.6	463.5
Total Assets	9,001.3	8,906.6
Payables:
Trade	65.4	76.0
Affiliates	1.6	1.5
Other	18.3	11.9
Gas payables	8.2	5.7
Accrued taxes, other	76.4	57.1
Accrued interest	36.6	37.9
Accrued payroll and employee benefits	27.9	33.7
Construction retainage	17.6	32.4
Deferred income	0.9	1.9
Other current liabilities	19.9	22.3
Total current liabilities	272.8	280.4
Long-term debt and capital lease obligation	3,675.2	3,686.8
Other Liabilities and Deferred Credits:
Pension liability	19.0	21.8
Asset retirement obligation	57.1	46.0
Provision for other asset retirement	70.2	65.8
Payable to affiliate	0.0	16.0
Other	76.0	65.0
Total other liabilities and deferred credits	222.3	214.6
Commitments and Contingencies
Partners’ Capital:
Common units - 250.3 million units issued and outstanding December 31, 2017	0.0	4,713.1
General partner	0.0	92.7
Partners' capital	4,909.6	0.0
Accumulated other comprehensive loss	(78.6)	(81.0)
Total partners’ capital	4,831.0	4,724.8
Total Liabilities and Partners' Capital	$ 9,001.3	$ 8,906.6