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Contingencies (Nu Mark Patent Litigation) (Details) - USD ($) $ in Millions | 1 Months Ended | 3 Months Ended
--- | --- | ---
Jan. 31, 2017 | Dec. 31, 2016 | Mar. 31, 2016
Loss Contingencies [Line Items] |  |  |
Litigation settlement, amount |  |  | $ 1,200
Nu Mark Patent Litigation [Member] |  |  |
Loss Contingencies [Line Items] |  |  |
Proceeds from legal settlements | $ 21 |  |
Litigation settlement, amount |  | $ 21 |

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- Definition Cash received for the settlement of litigation during the current period. + References 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=66902209&loc=d3e3536-108585 + Details
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