Acquisitions and Divestitures Textual (Details)	3 Months Ended
Mar. 31, 2017 businesses_acquired businesses_divested
Business Acquisition [Line Items]
Divestiture activity \| businesses_divested	0
Acquisition activity \| businesses_acquired	0

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

Name:	us-gaap_BusinessAcquisitionLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration