CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 0	$ 0
Accounts receivable, net	38	45
Accounts receivable from related companies	8	9
Exchanges receivable	5	9
Inventories	47	61
Other current assets	7	7
Total current assets	105	131
Property, Plant and Equipment, Net [Abstract]
Property, plant and equipment	3,331	3,281
Accumulated depreciation	(680)	(607)
Property, Plant and Equipment, Net, Total	2,651	2,674
Operating Lease, Right-of-Use Asset	5	5
Other non-current assets, net	164	159
Total assets	2,925	2,969
Current liabilities:
Accounts payable	5	11
Accounts payable to related companies	17	34
Exchanges payable	33	47
Other current liabilities	48	70
Total current liabilities	103	162
Long-term debt, less current maturities	246	247
Note payable to related company	593	732
Operating Lease, Liability, Noncurrent	5	5
Other non-current liabilities	232	221
Commitments and contingencies
Partners’ capital:
Partners’ capital	1,758	1,626
Accumulated other comprehensive loss	(12)	(24)
Total partners’ capital	1,746	1,602
Total liabilities and partners’ capital	$ 2,925	$ 2,969