Other Commitments and Contingencies (Details) $ in Millions	9 Months Ended
Sep. 30, 2017 USD ($)
Owens
Litigation
Settlement paid	$ 30

Amount of cash outflow reducing loss contingency liability.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration