Accounting Policies and Basis of Presentation (Tables)

9 Months Ended

Sep. 30, 2017

Accounting Policies [Abstract]

Summary of the Adjustments on the Impacted Financial Statements

A summary of the adjustments on the impacted financial statement line items in the Condensed Consolidated Statements of Operations as revised and as previously presented in the September 30, 2016 Form 10-Q is as follows ($ in millions):

	Three Months Ended September 30, 2016									Nine Months Ended September 30, 2016
	As previously presented			Impact of change to FIFO			As revised			As previously presented			Impact of change to FIFO			As revised
Cost of sales	$	308.3		$	0.7		$	309.0		$	1,023.3		$	3.8		$	1,027.1
Operating loss		(133.5	)		(0.7	)		(134.2	)		(125.7	)		(3.8	)		(129.5	)
Loss from continuing operations before taxes    on income		(143.5	)		(0.7	)		(144.2	)		(229.7	)		(3.8	)		(233.5	)
Provision (benefit) for taxes on income		(5.3	)		—			(5.3	)		116.9			(13.8	)		103.1
Income (loss) from continuing operations		(138.2	)		(0.7	)		(138.9	)		(346.6	)		10.0			(336.6	)
Discontinued operations:
Loss from discontinued operations, net of income    taxes		(1.8	)		—			(1.8	)		(5.8	)		—			(5.8	)
Net income (loss)	$	(140.0	)	$	(0.7	)	$	(140.7	)	$	(352.4	)	$	10.0		$	(342.4	)
Income (loss) per common share - basic and diluted
Income (loss) from continuing operations	$	(1.00	)	$	(0.01	)	$	(1.01	)	$	(2.52	)	$	0.07		$	(2.45	)
Loss from discontinued operations		(0.01	)		—			(0.01	)		(0.04	)		—			(0.04	)
Income (loss) per common share	$	(1.01	)	$	(0.01	)	$	(1.02	)	$	(2.56	)	$	0.07		$	(2.49	)