CONSOLIDATED STATEMENT OF CHANGES IN EQUITY - USD ($) $ in Millions	Total	Common shares:	Other capital:	Retained earnings (accumulated deficit):	Accumulated other comprehensive loss:
Balance at beginning of period at Dec. 31, 2019		$ 932	$ 8,152	$ (3)	$ (904)
Issued for exercise of stock options and vested restricted stock units		1	6
Shared-based compensation			7
Other transactions, net			(6)
Net earnings	$ 150			150
Dividends on common shares				(256)
Other comprehensive income	3				3
Balance at end of period at Mar. 31, 2020	$ 8,082	933	8,159	(109)	(901)
Dividends paid per common share	$ 0.34
Balance at beginning of period at Dec. 31, 2020	$ 8,731	934	8,208	411	(822)
Issued for exercise of stock options and vested restricted stock units		2	16
Shared-based compensation			7
Other transactions, net			(9)
Net earnings	681			681
Dividends on common shares				(130)
Other comprehensive income	30				30
Balance at end of period at Mar. 31, 2021	$ 9,328	$ 936	$ 8,222	$ 962	$ (792)
Dividends paid per common share	$ 0.17