Basis of Presentation and Accounting Policies Impairments of Long-Lived Assets (Details)
$ in Millions
|6 Months Ended|
Jun. 30, 2017
|Property, Plant and Equipment [Abstract]|
|Asset Impairment Charges||$ (5.7)|
Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.
Reference 1: http://www.xbrl.org/2003/role/presentationRef