CONSOLIDATED STATEMENT OF OPERATIONS - USD ($) shares in Thousands, $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Net sales	$ 1,643	$ 1,865
Costs of sales	1,322	1,348
Gross margin	321	517
Selling expenses	21	23
General and administrative expenses	89	78
Research and development expenses	1	2
Other operating costs, net (Note 15)	36	10
Operating income	174	404
Non-operating pension and other postretirement benefit costs	(470)	(24)
Interest income and other	10	12
Interest expense, net of capitalized interest	(107)	(93)
Earnings (loss) before income taxes	(393)	299
Income taxes (Note 18)	104	(30)
Net earnings (loss)	$ (289)	$ 269
Earnings (loss) per share, basic and diluted (Note 5)	$ (0.39)	$ 0.35
Weighted average shares outstanding (in thousands) (Note 5):
Basic	746,603	756,815
Diluted	746,603	759,462