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 units		1	9
Share-based compensation			22
Other transactions, net			(5)
Net earnings	$ 505			505
Dividends on common shares				(256)
Other comprehensive income	74				74
Repurchases of common shares (Note 4)		0	0
Balance at end of period at Sep. 30, 2020	$ 8,527	933	8,178	246	(830)
Dividends paid per common share	$ 0.34
Balance at beginning of period at Jun. 30, 2020		933	8,166	(37)	(860)
Issued for exercise of stock options and vested units		0	3
Share-based compensation			7
Other transactions, net			2
Net earnings	$ 283			283
Dividends on common shares				0
Other comprehensive income	30				30
Repurchases of common shares (Note 4)		0	0
Balance at end of period at Sep. 30, 2020	$ 8,527	933	8,178	246	(830)
Dividends paid per common share	$ 0
Balance at beginning of period at Dec. 31, 2020	$ 8,731	934	8,208	411	(822)
Issued for exercise of stock options and vested units		3	44
Share-based compensation			23
Other transactions, net			(8)
Net earnings	2,191			2,191
Dividends on common shares				(760)
Other comprehensive income	171				171
Repurchases of common shares (Note 4)		(1)	(25)
Balance at end of period at Sep. 30, 2021	$ 10,369	936	8,242	1,842	(651)
Dividends paid per common share	$ 0.51
Balance at beginning of period at Jun. 30, 2021		937	8,258	1,861	(656)
Issued for exercise of stock options and vested units		0	1
Share-based compensation			8
Other transactions, net			0
Net earnings	$ 482			482
Dividends on common shares				(501)
Other comprehensive income	5				5
Repurchases of common shares (Note 4)		(1)	(25)
Balance at end of period at Sep. 30, 2021	$ 10,369	$ 936	$ 8,242	$ 1,842	$ (651)
Dividends paid per common share	$ 0.17