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, 2018		$ 933	$ 8,172	$ 1,093	$ (1,152)
Issued for exercise of stock options and vested restricted stock units		1	2
Repurchases of common shares (Note 4)		(3)	(57)
Shared-based compensation			9
Other transactions, net			(5)
Net earnings (loss)	$ (289)			(289)
Dividends on common shares				(254)
Adjustments related to accounting pronouncements and other				(7)
Other comprehensive income					358
Balance at end of period at Mar. 31, 2019	$ 8,801	931	8,121	543	(794)
Dividends paid per common share	$ 0.34
Balance at beginning of period at Dec. 31, 2019	$ 8,177	932	8,152	(3)	(904)
Issued for exercise of stock options and vested restricted stock units		1	6
Repurchases of common shares (Note 4)		0	0
Shared-based compensation			7
Other transactions, net			(6)
Net earnings (loss)	150			150
Dividends on common shares				(256)
Adjustments related to accounting pronouncements and other				0
Other comprehensive income					3
Balance at end of period at Mar. 31, 2020	$ 8,082	$ 933	$ 8,159	$ (109)	$ (901)
Dividends paid per common share	$ 0.34