Consolidated Statements of Changes in Equity - USD ($) $ in Millions	Common Stock	Accumulated Other Comprehensive Loss	Retained Earnings	Noncontrolling Interest	Total
Balances at Dec. 31, 2016	$ 1	$ (304)	$ 3,465	$ 13	$ 3,175
Increase (Decrease) in Stockholders' Equity
Reduction to noncontrolling interests				(1)	(1)
Comprehensive income:
Net earnings (loss)			247	(1)	246
Other comprehensive loss, net of tax		(5)			(5)
Dividends on common stock ($6.00/share for 2017 and 2018 and $9.00/share for 2019)			(7)		(7)
Balances at Dec. 31, 2017	1	(354)	3,750	11	3,408
Increase (Decrease) in Stockholders' Equity
Adoption of accounting guidance		(45)	45
Addition to noncontrolling interests				4	4
Reduction to noncontrolling interests			(1)	(3)	(4)
Comprehensive income:
Net earnings (loss)			(17)		(17)
Other comprehensive loss, net of tax		(49)		(1)	(50)
Repurchase of common stock			(5)		(5)
Dividends on common stock ($6.00/share for 2017 and 2018 and $9.00/share for 2019)			(7)		(7)
Balances at Dec. 31, 2018	1	(410)	3,727	11	3,329
Increase (Decrease) in Stockholders' Equity
Adoption of accounting guidance | ASU 2016-01		(7)
Adoption of accounting guidance		(7)	7
Reduction to noncontrolling interests				(1)	(1)
Comprehensive income:
Net earnings (loss)			283		283
Other comprehensive loss, net of tax		(30)			(30)
Repurchase of common stock			(17)		(17)
Dividends on common stock ($6.00/share for 2017 and 2018 and $9.00/share for 2019)			(10)		(10)
Balances at Dec. 31, 2019	$ 1	$ (440)	$ 3,983	$ 10	$ 3,554