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Commitments and Contingent Liabilities (Maximum Potential Obligation) (Details) (USD $) In Millions, unless otherwise specified | Dec. 31, 2013 | Dec. 31, 2012
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Commitment Period Two Thousand Twenty Six [Member] |  |
Guarantor Obligations [Line Items] |  |
Guarantor Obligations, Maximum Exposure, Undiscounted | $ 500.0 | $ 0
Commitment Period Two Thousand Thirty Three [Member] |  |
Guarantor Obligations [Line Items] |  |
Guarantor Obligations, Maximum Exposure, Undiscounted | 1,350.0 | 0
Commitment Period Two Thousand Thirty Five [Member] |  |
Guarantor Obligations [Line Items] |  |
Guarantor Obligations, Maximum Exposure, Undiscounted | 0 | 560.0
Commitment Period Two Thousand Thirty Six [Member] |  |
Guarantor Obligations [Line Items] |  |
Guarantor Obligations, Maximum Exposure, Undiscounted | $ 1,250.0 | $ 0

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- Definition Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12069-110248 + Details
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