CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 1	$ 2
Accounts receivable, net	43	45
Accounts receivable from related companies	10	12
Exchanges receivable	10	5
Inventories	91	150
Other current assets	3	3
Total current assets	158	217
Property, plant and equipment:
Property, plant and equipment	3,207	3,199
Accumulated depreciation	(447)	(419)
Net property, plant and equipment	2,760	2,780
Other non-current assets, net	169	167
Goodwill	23	23
Total assets	3,110	3,187
Current liabilities:
Current maturities of long-term debt	404	407
Accounts payable and accrued liabilities	2	3
Accounts payable to related companies	45	32
Exchanges payable	78	131
Other current liabilities	44	53
Total current liabilities	573	626
Long-term debt, less current maturities	409	411
Note payable to related party	58	113
Deferred income taxes	462	451
Other non-current liabilities	241	241
Commitments and contingencies
Partners’ capital:
Partners’ capital	1,373	1,348
Accumulated other comprehensive loss	(6)	(3)
Total partners’ capital	1,367	1,345
Total liabilities and partners’ capital	$ 3,110	$ 3,187