CONSOLIDATED BALANCE SHEET (Unaudited) (Parenthetical) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Cash and cash equivalents	$ 549	$ 714
Receivables	1,098	1,194
Other current assets (Note 5) ($8 and $7 related to Altus VIE)	1,144	779
Gathering, transmission and processing facilities	2,057	1,856
Other	1,156	1,120
Less: Accumulated depreciation, depletion, and amortization	(26,236)	(28,335)
Equity method interests	527	121
Deferred charges and other	732	353
Current debt	175	151
Other current liabilities	1,443	1,341
Asset retirement obligation	1,850	1,866
Other	$ 514	$ 219
Common stock, par value (in USD per share)	$ 0.625	$ 0.625
Common stock, shares authorized (in shares)	860,000,000	860,000,000
Common stock, shares issued (in shares)	416,920,316	415,692,116
Treasury stock, shares (in shares)	40,964,193	40,995,894
Altus VIE
Cash and cash equivalents	$ 377	$ 450
Receivables	102	92
Other current assets (Note 5) ($8 and $7 related to Altus VIE)	8	7
Gathering, transmission and processing facilities	1,452	1,251
Other	38	0
Less: Accumulated depreciation, depletion, and amortization	(40)	(24)
Equity method interests	527	91
Deferred charges and other	72	71
Current debt	23	0
Other current liabilities	44	85
Asset retirement obligation	33	29
Other	$ 94	$ 0