CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Statement of Cash Flows [Abstract]
Repayments of Long-term Debt	$ 300	$ 0	$ 0
Proceeds from Related Party Debt	113	0	0
OPERATING ACTIVITIES:
Net income (loss)	(45)	(646)	105
Reconciliation of net income (loss) to net cash provided by operating activities:
Depreciation and amortization	127	130	133
Goodwill Impairment	389	771	0
Deferred income taxes	(252)	(21)	31
Amortization of deferred financing fees	(24)	(24)	(23)
Distributions of earnings received from unconsolidated affiliates	6	0	9
Other non-cash	8	10	(13)
Changes in operating assets and liabilities	(49)	103	(66)
Net cash flows provided by operating activities	160	323	176
INVESTING ACTIVITIES:
Proceeds from affiliates	291	49	40
Increase (Decrease) in Notes Receivable, Related Parties, Current	(40)	(265)	(40)
Capital expenditures	(154)	(106)	(128)
Distributions from unconsolidated affiliates in excess of cumulative earnings	0	0	46
Other	2	0	2
Net cash flows provided by (used in) investing activities	99	(322)	(80)
FINANCING ACTIVITIES:
Distribution Made to Limited Partner, Cash Distributions Paid	74	0	125
Net cash flows used in financing activities	(261)	0	(125)
NET CHANGE IN CASH AND CASH EQUIVALENTS	(2)	1	(29)
CASH AND CASH EQUIVALENTS, beginning of period	4	3	32
CASH AND CASH EQUIVALENTS, end of period	$ 2	$ 4	$ 3