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 year at Dec. 31, 2018		$ 933	$ 8,172	$ 1,093	$ (1,152)
Issued for exercise of stock options and vested units		2	12
Repurchases of common shares (Note 15)		(3)	(57)
Share-based compensation			30
Other transactions, net			(5)
Net earnings (loss)	$ (76)			(76)
Dividends on common shares				(1,013)
Adjustments related to new accounting pronouncements (Notes 15 and 17)				(7)
Other comprehensive income					248
Balance at end of year at Dec. 31, 2019	$ 8,177	932	8,152	(3)	(904)
Dividends paid per common share	$ 1.36
Issued for exercise of stock options and vested units		2	31
Repurchases of common shares (Note 15)		0	0
Share-based compensation			30
Other transactions, net			(5)
Net earnings (loss)	$ 797			797
Dividends on common shares				(383)
Adjustments related to new accounting pronouncements (Notes 15 and 17)				0
Other comprehensive income					82
Balance at end of year at Dec. 31, 2020	$ 8,731	934	8,208	411	(822)
Dividends paid per common share	$ 0.51
Issued for exercise of stock options and vested units		3	49
Repurchases of common shares (Note 15)		(3)	(97)
Share-based compensation			30
Other transactions, net			(9)
Net earnings (loss)	$ 2,607			2,607
Dividends on common shares				(887)
Adjustments related to new accounting pronouncements (Notes 15 and 17)				0
Other comprehensive income					343
Balance at end of year at Dec. 31, 2021	$ 10,767	$ 934	$ 8,181	$ 2,131	$ (479)
Dividends paid per common share	$ 1.18