CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Millions	1 Months Ended	2 Months Ended	3 Months Ended
	Feb. 09, 2021	Mar. 31, 2021	Mar. 31, 2020
Revenues and other:
Oil and natural gas derivatives	$ (382)	$ 46	$ 907
Gains on sales of assets	5	4	0
Total revenues and other	260	880	2,525
Operating expenses:
Severance and ad valorem taxes	18	24	54
General and administrative	21	15	65
Separation and other termination costs	22	0	5
Depreciation, depletion and amortization	72	122	603
Impairments	0	0	8,522
Other operating expense (income), net	(12)	2	68
Total operating expenses	494	595	10,752
Income (loss) from operations	(234)	285	(8,227)
Other income (expense):
Interest expense	(11)	(12)	(145)
Gains on purchases or exchanges of debt	0	0	63
Other income (expense)	2	22	(17)
Reorganization items, net	5,569	0	0
Total other income (expense)	5,560	10	(99)
Income (loss) before income taxes	5,326	295	(8,326)
Income tax benefit	(57)	0	(13)
Net income (loss)	5,383	295	(8,313)
Net loss attributable to noncontrolling interests	0	0	16
Net income (loss) attributable to Chesapeake	5,383	295	(8,297)
Preferred stock dividends	0	0	(22)
Net income (loss) available to common stockholders	$ 5,383	$ 295	$ (8,319)
Earnings (loss) per common share:
Basic (in dollars per share)	$ 550.35	$ 3.01	$ (852.97)
Diluted (in dollars per share)	$ 534.51	$ 2.75	$ (852.97)
Weighted average common shares outstanding (in thousands):
Basic (in shares)	9,781	97,907	9,753
Diluted (in shares)	10,071	107,159	9,753
Oil, natural gas and NGL
Revenues and other:
Total revenues and other	$ 398	$ 553	$ 894
Marketing
Revenues and other:
Total revenues and other	239	277	724
Operating expenses:
Expense	237	280	746
Production
Operating expenses:
Expense	32	40	122
Gathering, processing and transportation
Operating expenses:
Expense	102	111	285
Exploration
Operating expenses:
Expense	$ 2	$ 1	$ 282