Basis of Presentation Increase to Cash Flow from Investing Abstract (Details) $ in Millions	9 Months Ended
Sep. 30, 2017 USD ($)
Increase to Cash from Investing Activity [Abstract]
ASU 2016-18 Reclassification Adjustment	$ 10.8

The amount of a reclassification adjustment made to prior period financial statement amounts.

No definition available.

Name:	us-gaap_PriorPeriodReclassificationAdjustment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration