CONSOLIDATED BALANCE SHEET (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Cash and cash equivalent	$ 247	$ 714
Receivables net of allowance	1,062	1,194
Other current assets (Note 5) ($5 and $7 related to Altus VIE)	652	779
Gathering, processing, and transmission facilities	799	1,856
Other	1,140	1,120
Accumulated depreciation	(28,987)	(28,335)
Equity method interests	1,258	121
Deferred charges and other	730	353
Current debt	11	151
Other current liabilities	1,149	1,341
Long-term debt	8,555	8,093
Asset retirement obligation	1,811	1,866
Other noncurrent liabilities	$ 520	$ 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)	417,026,863	415,692,116
Treasury stock, shares (in shares)	40,964,193	40,995,894
Variable Interest Entity, Primary Beneficiary
Cash and cash equivalent	$ 6	$ 450
Receivables net of allowance	88	92
Other current assets (Note 5) ($5 and $7 related to Altus VIE)	5	7
Gathering, processing, and transmission facilities	203	1,251
Other	4	0
Accumulated depreciation	(1)	(24)
Equity method interests	1,258	91
Deferred charges and other	4	71
Current debt	10	0
Other current liabilities	21	85
Long-term debt	396	0
Asset retirement obligation	60	29
Other noncurrent liabilities	$ 107	$ 0