Contingencies (Other MSA-Related Litigation) (Details)	9 Months Ended
Sep. 30, 2017 case
Other MSA-Related Litigation [Member]
Loss Contingencies [Line Items]
Number of unfavorable verdicts	16

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