STATEMENTS OF CONDENSED CONSOLIDATED EQUITY (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Treasury Stock	Retained Earnings (Accumulated Deficit)	Accumulated Other Comprehensive Loss		Noncontrolling Interest in Consolidated Subsidiaries
Beginning balance (in shares) at Dec. 31, 2020		278,345
Beginning balance at Dec. 31, 2020	$ 9,174,952	$ 8,145,539	$ (29,348)	$ 1,056,626	$ (5,355)	[1]	$ 7,490
Comprehensive income (loss), net of tax:
Net (loss) income	(2,947,474)			(2,947,499)			25
Other post-retirement benefits liability adjustment, net of tax expense	198				198	[1]
Share-based compensation plans (in shares)		618
Share-based compensation plans	24,709	$ 13,563	11,146
Convertible Notes settlements (Note 6)	0
Alta Acquisition (Note 9) (in shares)		98,789
Alta Acquisition (Note 9)	1,925,405	$ 1,925,405
Contribution from noncontrolling interest	3,750						3,750
Ending balance (in shares) at Sep. 30, 2021		377,752
Ending balance at Sep. 30, 2021	8,181,540	$ 10,084,507	(18,202)	(1,890,873)	(5,157)	[2]	11,265
Beginning balance (in shares) at Jun. 30, 2021		278,858
Beginning balance at Jun. 30, 2021	8,220,932	$ 8,149,607	(20,084)	85,939	(5,194)	[2]	10,664
Comprehensive income (loss), net of tax:
Net (loss) income	(1,976,211)			(1,976,812)			601
Other post-retirement benefits liability adjustment, net of tax expense	37				37	[2]
Share-based compensation plans (in shares)		105
Share-based compensation plans	11,377	$ 9,495	1,882
Alta Acquisition (Note 9) (in shares)		98,789
Alta Acquisition (Note 9)	1,925,405	$ 1,925,405
Ending balance (in shares) at Sep. 30, 2021		377,752
Ending balance at Sep. 30, 2021	8,181,540	$ 10,084,507	(18,202)	(1,890,873)	(5,157)	[2]	11,265
Beginning balance (in shares) at Dec. 31, 2021		376,399
Beginning balance at Dec. 31, 2021	9,970,999	$ 10,071,820	(18,046)	(94,400)	(4,611)	[1]	16,236
Comprehensive income (loss), net of tax:
Net (loss) income	67,103			58,983			8,120
Other post-retirement benefits liability adjustment, net of tax expense	190				190	[1]
Dividends	(148,765)			(148,765)
Share-based compensation plans (in shares)		2,061
Share-based compensation plans	28,807	$ 11,340	17,467
Convertible Notes settlements (Note 6) (in shares)		3
Convertible Notes settlements (Note 6)	48	$ 48
Repurchase and retirement of common stock (in shares)		(10,301)
Repurchase and retirement of common stock	(275,064)	$ (159,669)		(115,395)
Distribution to noncontrolling interest	(7,200)						(7,200)
Contribution from noncontrolling interest	11,250						11,250
Other	11,233						11,233
Ending balance (in shares) at Sep. 30, 2022		368,162
Ending balance at Sep. 30, 2022	9,658,601	$ 9,923,539	(579)	(299,577)	(4,421)	[2]	39,639
Beginning balance (in shares) at Jun. 30, 2022		369,720
Beginning balance at Jun. 30, 2022	9,090,090	$ 9,948,646	(2,848)	(880,127)	(4,484)	[2]	28,903
Comprehensive income (loss), net of tax:
Net (loss) income	687,462			683,670			3,792
Other post-retirement benefits liability adjustment, net of tax expense	63				63	[2]
Dividends	(55,493)			(55,493)
Share-based compensation plans (in shares)		209
Share-based compensation plans	4,561	$ 2,292	2,269
Convertible Notes settlements (Note 6) (in shares)		1
Convertible Notes settlements (Note 6)	10	$ 10
Repurchase and retirement of common stock (in shares)		(1,768)
Repurchase and retirement of common stock	(75,036)	$ (27,409)		(47,627)
Distribution to noncontrolling interest	(4,306)						(4,306)
Contribution from noncontrolling interest	11,250						11,250
Ending balance (in shares) at Sep. 30, 2022		368,162
Ending balance at Sep. 30, 2022	$ 9,658,601	$ 9,923,539	$ (579)	$ (299,577)	$ (4,421)	[2]	$ 39,639

[1] Amounts included in accumulated other comprehensive loss are related to other postretirement benefits liability adjustments, net of tax, which are attributable to net actuarial losses and net prior service costs.

[2] Amounts included in accumulated other comprehensive loss are related to other postretirement benefits liability adjustments, net of tax, which are attributable to net actuarial losses and net prior service costs.