Contingencies (Nu Mark Patent Litigation) (Details) - Nu Mark Patent Litigation [Member] - USD ($) $ in Millions	1 Months Ended	3 Months Ended
Jan. 31, 2017	Dec. 31, 2016
Loss Contingencies [Line Items]
Proceeds from legal settlements	$ 21
Litigation settlement		$ 21

Cash received for the settlement of litigation during the current period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 25
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3536-108585

Name:	us-gaap_ProceedsFromLegalSettlements
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration