Condensed Combined Debtor-in-Possession Financial Information - Condensed Consolidated Balance Sheets (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019	Sep. 30, 2019
CURRENT ASSETS:
Cash and cash equivalents	$ 306	$ 6
Total Current Assets	1,072	1,251
PROPERTY AND EQUIPMENT:
TOTAL ASSETS	6,903	16,193
CURRENT LIABILITIES:
Total Current Liabilities	3,105	2,392
Long-term debt, net	0	9,073
Liabilities subject to compromise	8,428	0
EQUITY (DEFICIT):
Chesapeake stockholders’ equity	(4,940)	4,364
Total Equity (Deficit)	(4,919)	4,401	$ 4,736
TOTAL LIABILITIES AND EQUITY (DEFICIT)	6,903	16,193
Debtor-in-Possession
CURRENT ASSETS:
Cash and cash equivalents	304	4
Other current assets	765	1,244
Total Current Assets	1,069	1,248
PROPERTY AND EQUIPMENT:
Oil and natural gas properties, based on successful efforts accounting, net	4,637	13,586
Other property and equipment, net	992	1,118
Property and equipment held for sale, net	10	10
Total Property and Equipment, Net	5,639	14,714
Other long-term assets	185	187
Investments in subsidiaries and intercompany advances	(11)	6
TOTAL ASSETS	6,882	16,155
CURRENT LIABILITIES:
Current liabilities	3,105	2,391
Total Current Liabilities	3,105	2,391
Long-term debt, net	0	9,073
Deferred income tax liabilities	0	10
Other long-term liabilities	289	317
Liabilities subject to compromise	8,428	0
Total Liabilities	11,822	11,791
EQUITY (DEFICIT):
Chesapeake stockholders’ equity	(4,940)	4,364
Total Equity (Deficit)	(4,940)	4,364
TOTAL LIABILITIES AND EQUITY (DEFICIT)	$ 6,882	$ 16,155