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Income Taxes (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2016	Dec. 31, 2015
Income tax expense	$ 20.7	$ 12.9	$ 36.0	$ 22.1
Effective income tax rate, continuing operations	22.60%	18.00%	21.40%	16.50%
Unrecognized tax benefit liability, including penalties and accrued interest	$ 29.6		$ 29.6			$ 48.5
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities			$ 26.1
Scenario, Forecast [Member]
Lower range of expected tax payments related to transfer pricing matters					$ 30.0
Upper range of expected payments related to transfer pricing matters					$ 40.0

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 13
-URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32698-109319

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Reference 3: http://www.xbrl.org/2003/role/presentationRef
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