Segment Information (Narrative) (Details)	3 Months Ended	6 Months Ended	12 Months Ended
Mar. 31, 2017 Business_Segments	Jul. 01, 2016 Reporting_Unit	Dec. 31, 2016 Reporting_Unit	Dec. 31, 2015 Reporting_Unit	Dec. 31, 2014 Reporting_Unit
Segment Reporting [Abstract]
Number of segments	4	5	4	4	4

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

No definition available.

Name:	us-gaap_NumberOfReportableSegments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration