Consolidated Statements of Earnings (Loss) and Comprehensive Income (Loss) (Unaudited) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2020 USD ($) $ / shares shares
Income Statement [Abstract]
Sales	$ 1,031
Operating expenses
Cost of sales, excluding depreciation and amortization	906
Depreciation and amortization	58
Selling, general and administrative	66
Other operating (income) loss, net (NOTE 7)	2
Operating expenses	1,032
Operating income (loss)	(1)
Interest expense, net	14
Non-service components of net periodic benefit cost (NOTE 6)	(4)
Loss before income taxes and equity loss	(11)
Income tax expense (NOTE 8)	3
Equity method investment loss, net of taxes	1
Loss from continuing operations	(15)
(Loss) earnings from discontinued operations, net of taxes (NOTE 3)	20
Net (loss) earnings	$ 5
Basic net (loss) earnings
Loss from continuing operations | $ / shares	$ (0.27)
(Loss) earnings from discontinued operations | $ / shares	0.36
Basic net (loss) earnings | $ / shares	0.09
Diluted net (loss) earnings
Loss from continuing operations | $ / shares	(0.27)
(Loss) earnings from discontinued operations | $ / shares	0.36
Diluted net (loss) earnings | $ / shares	$ 0.09
Weighted average number of common shares outstanding (millions)
Basic | shares	56.1
Diluted | shares	56.2
Cash dividends per common share | $ / shares	$ 0.46
Net (loss) earnings	$ 5
Net derivative gains (losses) on cash flow hedges:
Net gains (losses) arising during the period, net of tax of $(3) (2020 – $16)	(49)
Less: Reclassification adjustment for (gains) losses included in net (loss) earnings, net of tax of $(1) (2020 – $(2))	7
Foreign currency translation adjustments	(74)
Change in unrecognized gains and prior service cost related to pension and post-retirement benefit plans, net of tax of $(1) (2020 – $(1))	1
Other comprehensive income (loss)	(115)
Comprehensive income (loss)	$ (110)