Consolidated Balance Sheets - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
CURRENT ASSETS
Cash	$ 17	$ 17
Trade receivables	277	299
Inventories	67	69
Other current assets, net	130	255
Total current assets	491	640
PROPERTY, PLANT AND EQUIPMENT	22,889	22,523
Accumulated depreciation, depletion and amortization	(16,537)	(16,068)
Total property, plant and equipment, net	6,352	6,455
OTHER ASSETS	115	63
TOTAL ASSETS	6,958	7,158
CURRENT LIABILITIES
Current maturities of long-term debt	100	0
Accounts payable	296	390
Accrued liabilities	313	217
Total current liabilities	709	607
LONG-TERM DEBT	4,877	5,251
DEFERRED GAIN AND ISSUANCE COSTS, NET	146	216
OTHER LONG-TERM LIABILITIES	720	575
MEZZANINE EQUITY
Redeemable noncontrolling interests	802	756
EQUITY
Preferred stock (20 million shares authorized at $0.01 par value); no shares outstanding at December 31, 2019 or 2018	0	0
Common stock (200 million shares authorized at $0.01 par value); 49,175,843 shares outstanding at December 31, 2019, 48,650,420 shares outstanding at December 31, 2018	0	0
Additional paid-in capital	5,004	4,987
Accumulated deficit	(5,370)	(5,342)
Accumulated other comprehensive loss	(23)	(6)
Total equity attributable to common stock	(389)	(361)
Noncontrolling interests	93	114
Total equity	(296)	(247)
TOTAL LIABILITIES AND EQUITY	$ 6,958	$ 7,158