CONSOLIDATED BALANCE SHEET (Unaudited) (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Cash and cash equivalents	$ 281	$ 262
Receivables net of allowance	1,057	908
Other current assets	709	676
Gathering, processing and transmission facilities	671	670
Other property and equipment	1,139	1,140
Accumulated depreciation	(35,146)	(34,810)
Equity method interests	1,567	1,555
Deferred charges and other	495	526
Other current liabilities	777	862
Long-term debt	8,713	8,770
Asset retirement obligation	1,914	1,888
Other current liabilities	$ 579	$ 602
Common stock, par value (in USD per share)	$ 0	$ 0.625
Common stock, shares authorized (in shares)	0	860,000,000
Common stock, shares issued (in shares)	0	418,429,375
Treasury stock, shares (in shares)	0	40,946,745
Altus VIE
Cash and cash equivalents	$ 51	$ 24
Receivables net of allowance	98	95
Other current assets	12	5
Gathering, processing and transmission facilities	206	206
Other property and equipment	3	3
Accumulated depreciation	(16)	(13)
Equity method interests	1,567	1,555
Deferred charges and other	6	5
Other current liabilities	8	4
Long-term debt	657	624
Asset retirement obligation	65	64
Other current liabilities	$ 161	$ 144