CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Parenthetical) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Chesapeake stockholders’ equity	$ 4,097
PREFERRED STOCK:
Chesapeake stockholders’ equity	1,671	$ 1,671	[1]
TREASURY STOCK – COMMON:
Chesapeake stockholders’ equity	$ (36)	$ (32)	[1]
Purchase of shares for company benefit plans (in shares)	2,539,473	1,451,478
Release of shares from company benefit plans (in shares)	110,796	275,407

[1] Financial information for prior periods has been recast to reflect the retrospective application of the successful efforts method of accounting. See Note 1.