CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Preferred stock, par value (in usd per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	20,000,000	20,000,000
Preferred stock, shares outstanding (in shares)	5,563,458	5,603,458
Common stock, par value (in usd per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	3,000,000,000	2,000,000,000
Common stock, shares issued (in shares)	1,954,558,617	913,715,512
Treasury stock, common shares (in shares)	5,244,992	3,246,553
Cash and cash equivalents ($2 and $1 attributable to our VIE)	$ 6	$ 4
Proved oil and natural gas properties ($755 and $755 attributable to our VIE)	30,765	25,407
Less: accumulated depreciation, depletion and amortization (($713) and ($707) attributable to our VIE)	(20,002)	(17,886)
Other current liabilities ($1 and $2 attributable to our VIE)	1,432	1,599
Variable Interest Entities, Primary Beneficiary
Cash and cash equivalents ($2 and $1 attributable to our VIE)	2	1
Proved oil and natural gas properties ($755 and $755 attributable to our VIE)	755	755
Less: accumulated depreciation, depletion and amortization (($713) and ($707) attributable to our VIE)	(713)	(707)
Other current liabilities ($1 and $2 attributable to our VIE)	$ 1	$ 2