CONSOLIDATED STATEMENT OF OPERATIONS - USD ($) shares in Thousands, $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Income Statement [Abstract]
Net sales (Note 3)	$ 1,728	$ 1,643
Costs of sales	1,382	1,322
Gross margin	346	321
Selling expenses	22	21
General and administrative expenses	74	89
Other operating costs, net (Note 15)	10	37
Operating income	240	174
Non-operating pension and other postretirement benefit costs (Note 7)	(9)	(470)
Interest income and other	1	10
Interest expense, net of capitalized interest	(85)	(107)
Earnings (loss) before income taxes	147	(393)
Income taxes (Note 16)	3	104
Net earnings (loss)	$ 150	$ (289)
Earnings (loss) per share, basic and diluted (Note 4)	$ 0.20	$ (0.39)
Weighted average shares outstanding (in thousands) (Note 4):
Basic	746,534	746,603
Diluted	747,155	746,603