Discontinued Operations (Tables)

12 Months Ended

Dec. 31, 2017

Discontinued Operations and Disposal Groups [Abstract]

Summary of Balance Sheet and Profit and Loss Information for Discontinued Operations

The following table summarizes the revenues, cost of revenues, operating expenses and income tax of discontinued operations for the periods indicated:

	Years ended December 31,
$ in millions	2016			2015
Revenues	$	—		$	340.9
Cost of revenues	—			(307.0		)
Operating expenses	(0.7		)	(22.5		)
Income / (loss) from discontinued operations before income tax	(0.7		)	11.4
Gain from disposal of discontinued operations	49.2			—
Income tax expense / (benefit) from discontinued operations	19.2			(1.0		)
Income from discontinued operations	$	29.3		$	12.4

The following table summarizes the major classes of assets and liabilities classified as held-for-sale as of December 31, 2017:

$ in millions	December 31, 2017
Assets
Accounts receivable, net	$	3.8
Inventories	7.6
Taxes applicable to subsequent years	4.9
Property, plant & equipment, net	233.7
Other assets	0.3
Total assets of the disposal group classified as held-for-sale in the balance sheet	$	250.3
Liabilities
Accounts payable	$	3.9
Accrued taxes	3.6
Taxes payable	4.9
Asset retirement obligations	0.6
Other liabilities	0.2
Total liabilities of the disposal group classified as held-for-sale in the balance sheet	$	13.2