STATEMENTS OF CONSOLIDATED STOCKHOLDERS' EQUITY (UNAUDITED) (UAH) - USD ($) $ in Millions	Total	Common Stock	Additional Capital Invested	Treasury Stock	Retained Earnings (Accumulated Deficit)	Accumulated Other Comprehensive Income (Loss)
Balance beginning (in shares) at Dec. 31, 2021		323,800,000
Balance beginning at Dec. 31, 2021	$ 5,029	$ 4	$ 9,156	$ (3,814)	$ 625	$ (942)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(106)				(106)
Other comprehensive loss	(22)					(22)
Stock-settled share-based compensation	70		70
Stock issued for share-based awards, net of shares withheld for tax (in shares)		3,100,000
Stock issued for share-based awards, net of shares withheld for tax	(73)		(256)	281	(98)
Balance ending (in shares) at Sep. 30, 2022		326,900,000
Balance ending at Sep. 30, 2022	4,898	$ 4	8,970	(3,533)	421	(964)
Balance beginning (in shares) at Jun. 30, 2022		326,700,000
Balance beginning at Jun. 30, 2022	3,964	$ 4	8,970	(3,551)	(515)	(944)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	942				942
Other comprehensive loss	(20)					(20)
Stock-settled share-based compensation	15		15
Stock issued for share-based awards, net of shares withheld for tax (in shares)		200,000
Stock issued for share-based awards, net of shares withheld for tax	(3)		(15)	18	(6)
Balance ending (in shares) at Sep. 30, 2022		326,900,000
Balance ending at Sep. 30, 2022	$ 4,898	$ 4	8,970	(3,533)	421	(964)
Balance beginning (in shares) at Dec. 31, 2022	326,930,321	326,900,000
Balance beginning at Dec. 31, 2022	$ 6,896	$ 4	8,986	(3,534)	1,265	175
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	2,018				2,018
Other comprehensive loss	(84)					(84)
Stock-settled share-based compensation	55		55
Stock issued for share-based awards, net of shares withheld for tax (in shares)		1,100,000
Stock issued for share-based awards, net of shares withheld for tax	$ (32)		(73)	92	(51)
Balance ending (in shares) at Sep. 30, 2023	328,013,283	328,000,000.0
Balance ending at Sep. 30, 2023	$ 8,853	$ 4	8,968	(3,442)	3,232	91
Balance beginning (in shares) at Jun. 30, 2023		328,000,000.0
Balance beginning at Jun. 30, 2023	7,705	$ 4	8,945	(3,442)	2,095	103
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	1,137				1,137
Other comprehensive loss	(12)					(12)
Stock-settled share-based compensation	$ 23		23
Balance ending (in shares) at Sep. 30, 2023	328,013,283	328,000,000.0
Balance ending at Sep. 30, 2023	$ 8,853	$ 4	$ 8,968	$ (3,442)	$ 3,232	$ 91