Unaudited Interim Consolidated Statements of Equity - USD ($) $ in Thousands		Total		Common   Stock	Additional Paid-in Capital	Retained Earnings / (Accumulated Deficit)	Accumulated Other Comprehensive   Income (Loss)
Beginning Balance at Dec. 31, 2021	[1]	$ 6,213,996		$ 2,500	$ 6,042,491	$ (227,449)	$ 396,454
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Contributed capital		8,160			8,160
Comprehensive income (loss):
NET INCOME (LOSS)		(482,207)	[2]			(482,207)
Other comprehensive income (loss), net of tax		66,559					66,559
Total comprehensive income (loss)		(415,648)
Ending Balance at Mar. 31, 2022		5,806,508		2,500	6,050,651	(709,656)	463,013
Beginning Balance at Dec. 31, 2022	[3]	5,036,195		2,500	6,037,914	(994,154)	(10,065)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Contributed capital		405,000			405,000
Contributed (distributed) capital-parent/child asset transfers		1,870			1,870
Comprehensive income (loss):
NET INCOME (LOSS)		279,679	[2]			279,679
Other comprehensive income (loss), net of tax		416,704					416,704
Total comprehensive income (loss)		696,383
Ending Balance at Mar. 31, 2023		$ 6,139,448		$ 2,500	$ 6,444,784	$ (714,475)	$ 406,639

[1] Prior period amounts adjusted for the implementation of ASU 2018-12: Targeted Improvements to the Accounting for Long-Duration Contracts.

[2] Prior period amounts adjusted for the implementation of ASU 2018-12: Targeted Improvements to the Accounting for Long-Duration Contracts.

[3]     Prior period amounts adjusted for the implementation of ASU 2018-12: Targeted Improvements to the Accounting for Long-Duration Contracts.