CONSOLIDATED STATEMENT OF CHANGES IN EQUITY Statement - USD ($) $ in Millions	Total	Common shares:	Other capital:	Retained earnings:	Accumulated other comprehensive loss:	Total equity:
Balance at beginning of period at Dec. 31, 2017		$ 944	$ 8,439	$ 1,078	$ (1,562)
Issued for exercised stock options and vested restricted stock units		3	46
Repurchases of common shares (Note 4)		0	0
Shared-based compensation			18
Other transactions, net			(7)
Net earnings (loss)	$ 586			586
Dividends on common shares				(485)
Adjustments related to accounting pronouncements				262	(262)
Other comprehensive loss	$ 221				221
Balance at end of period at Jun. 30, 2018		947	8,496	1,441	(1,603)	$ 9,281
Dividends paid per common share	$ 0.64
Balance at beginning of period at Mar. 31, 2018		946	8,466	1,365	(1,786)
Issued for exercised stock options and vested restricted stock units		1	22
Repurchases of common shares (Note 4)		0	0
Shared-based compensation			9
Other transactions, net			(1)
Net earnings (loss)	$ 317			317
Dividends on common shares				(243)
Adjustments related to accounting pronouncements				2	0
Other comprehensive loss	$ 183				183
Balance at end of period at Jun. 30, 2018		947	8,496	1,441	(1,603)	9,281
Dividends paid per common share	$ 0.32
Balance at beginning of period at Dec. 31, 2018	$ 9,046	933	8,172	1,093	(1,152)
Issued for exercised stock options and vested restricted stock units		1	4
Repurchases of common shares (Note 4)		(3)	(57)
Shared-based compensation			16
Other transactions, net			(5)
Net earnings (loss)	(161)			(161)
Dividends on common shares				(507)
Adjustments related to accounting pronouncements				(7)	0
Other comprehensive loss	397				397
Balance at end of period at Jun. 30, 2019	$ 8,724	931	8,130	418	(755)	8,724
Dividends paid per common share	$ 0.68
Balance at beginning of period at Mar. 31, 2019		931	8,121	543	(794)
Issued for exercised stock options and vested restricted stock units		0	2
Repurchases of common shares (Note 4)		0	0
Shared-based compensation			7
Other transactions, net			0
Net earnings (loss)	$ 128			128
Dividends on common shares				(253)
Adjustments related to accounting pronouncements				0	0
Other comprehensive loss	39				39
Balance at end of period at Jun. 30, 2019	$ 8,724	$ 931	$ 8,130	$ 418	$ (755)	$ 8,724
Dividends paid per common share	$ 0.34