Discontinued Operations (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Deposit received on sale of DPLER		$ 75.5	$ 0.0
Accounts receivable, net		31.0	64.4
Property, plant & equipment, net		4.6	4.9
Intangible assets, net		24.6	29.6
Other assets		2.0	2.9
Total assets of the disposal group classified as held for sale in the balance sheets		62.2	101.8
Accounts payable		0.8	14.8
Other liabilities		0.8	2.5
Total liabilities of the disposal group classified as held for sale in the balance sheets		1.6	17.3
Revenues		340.9	533.6	$ 511.6
Cost of revenues		(307.0)	(493.0)	(466.8)
Operating expenses		(22.5)	(34.0)	(38.8)
Goodwill impairment		0.0	(135.8)	0.0
Profit / (loss) of discontinued operations before income taxes		11.4	(129.2)	6.0
Income tax expense / (benefit)		(1.0)	2.6	2.4
Discontinued operations		12.4	(131.8)	3.6
Cash provided by (used in) operating activities, discontinued operations		35.8	29.6	(7.7)
Cash provided by (used in) investing activities, discontinued operations		0.5	$ (2.2)	$ (2.0)
DPLER [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Deposit received on sale of DPLER		$ 75.5
Scenario, Forecast [Member] | DPLER [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (loss) on disposal of discontinued operation, net of tax	$ 56.0