CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Current Assets
Cash and cash equivalents	$ 51	$ 33
Accounts receivable and other (Note 14)	40	42
Inventories	8	8
Other	9	7
Total current assets	108	90
Equity investments (Note 5)	1,211	1,213
Plant, property and equipment (Net of $1,229 accumulated depreciation; 2017 - $1,181)	2,086	2,123
Goodwill	130	130
Other assets	11	3
Total assets	3,546	3,559
Current Liabilities
Accounts payable and accrued liabilities	27	31
Accounts payable to affiliates (Note 12)	6	5
Distributions payable		1
Accrued interest	12	12
Current portion of long-term debt (Note 7)	36	51
Total current liabilities	81	100
Long-term debt, net (Note 7)	2,272	2,352
Deferred state income taxes (Note 18)	10	10
Other liabilities	28	29
Total liabilities	2,391	2,491
Partners' Equity
Accumulated other comprehensive income (AOCI)	15	5
Controlling interests	1,044	963
Non-controlling interests	111	105
Total partners' equity	1,155	1,068
Total liabilities and partners' equity	3,546	3,559
Common Units
Partners' Equity
Limited partner	912	824
Class B Units
Partners' Equity
Limited partner	95	110
General partner	$ 22	$ 24