CONSOLIDATED BALANCE SHEET (Unaudited) (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Cash and cash equivalents	$ 348	$ 262
Receivables, net of allowance	1,167	908
Other current assets	599	676
Gathering, processing and transmission facilities	673	670
Other property and equipment	1,124	1,140
Accumulated depreciation	33,889	34,810
Equity method interests	1,538	1,555
Accounts payable	643	444
Deferred charges and other	514	526
Other current liabilities	937	862
Long-term debt	7,193	8,770
Asset retirement obligation	1,912	1,888
Other current liabilities	$ 527	$ 602
Common stock, par value (in USD per share)	$ 0.625	$ 0.625
Common stock, shares authorized (in shares)	1,000	860,000,000
Common stock, shares issued (in shares)	1,000	418,429,375
Treasury stock, shares (in shares)	0	40,946,745
Altus VIE
Cash and cash equivalents	$ 109	$ 24
Receivables, net of allowance	99	95
Other current assets	9	5
Gathering, processing and transmission facilities	207	206
Other property and equipment	4	3
Accumulated depreciation	22	13
Equity method interests	1,538	1,555
Accounts payable	9	6
Deferred charges and other	8	5
Other current liabilities	15	4
Long-term debt	657	624
Asset retirement obligation	67	64
Other current liabilities	$ 126	$ 144