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Investment Securities (Other long-term investments) (Details) (USD $) In Millions, unless otherwise specified | Sep. 30, 2014 | Dec. 31, 2013
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Schedule of Trading Securities and Other Trading Assets [Line Items] |  |
Other Investments | $ 320.9 | $ 288.9
Partnership investments [Member] |  |
Schedule of Trading Securities and Other Trading Assets [Line Items] |  |
Other Investments | 23.5 | 26.6
Hedge and private equity funds included in other long-term investments |  |
Schedule of Trading Securities and Other Trading Assets [Line Items] |  |
Other Investments | 241.9 | 239.0
Limited Liability Company [Member] |  |
Schedule of Trading Securities and Other Trading Assets [Line Items] |  |
Other Investments | 50.1 | 20.3
Other |  |
Schedule of Trading Securities and Other Trading Assets [Line Items] |  |
Other Investments | 5.2 | 3.1
Forward Contracts |  |
Schedule of Trading Securities and Other Trading Assets [Line Items] |  |
Other Investments | $ 0.2 | $ (0.1)

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- Definition Other investments not otherwise specified in the taxonomy. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.12) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 12 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Subparagraph g -Article 7 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.1(f,g)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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- Details
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