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Consolidated Condensed Statements of Comprehensive Income (Unaudited) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2012 | Jun. 30, 2011 | Jun. 30, 2012 | Jun. 30, 2011
Consolidated Condensed Statements of Comprehensive Income (Unaudited) [Abstract] |  |  |  |
Net income | $ 16.8 | $ 169.7 | $ 20.0 | $ 291.0
Other comprehensive income: |  |  |  |
Net foreign currency translation adjustment | (45.5) | 56.3 | (15.4) | 174.9
Net change in postretirement benefit plans, net of tax impacts of $0.0 $11.9, $0.0 and $23.7, respectively | 2.9 | 19.8 | 14.4 | 39.6
Net change in unrealized gains on investment securities, net of tax impacts of $0.0, $2.9, $0.0 and $6.6, respectively | 0 | (4.8) | 0 | (10.9)
Other comprehensive income | (42.6) | 71.3 | (1.0) | 203.6
Comprehensive (loss) income | (25.8) | 241.0 | 19.0 | 494.6
Net change in postretirement benefit plans, net of tax: |  |  |  |
Amortization of prior service costs, net of tax benefit of $0.0, $0.2, $0.0 and $0.5, respectively | 0.2 | 0.4 | 0.4 | 0.8
Amortization of net actuarial loss, net of tax benefit of $0.0, $11.7, $0.0 and $23.2, respectively | 2.7 | 19.4 | 5.3 | 38.8
Unrealized change in net actuarial loss, net of tax expense of $0.0 | 0 | 0 | 8.7 | 0
Net change in postretirement benefit plans, net of tax | 2.9 | 19.8 | 14.4 | 39.6
Net change in unrealized gains on investment securities, net of tax: |  |  |  |
Unrealized losses arising during period, net of tax benefit of $0.0, $0.2, $0.0 and $0.5, respectively | 0 | (0.3) | 0 | (0.8)
Gains realized during the period, net of tax expense of $0.0, $2.7, $0.0 and $6.1, respectively | 0 | (4.5) | 0 | (10.1)
Net change in unrealized gains on investment securities, net of tax | $ 0 | $ (4.8) | $ 0 | $ (10.9)

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- Definition The change in equity [net assets] of a business enterprise during a period from transactions and other events and circumstances from non-owner sources which are attributable to the reporting entity. It includes all changes in equity during a period except those resulting from investments by owners and distributions to owners, but excludes any and all transactions which are directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Net Income -URI http://asc.fasb.org/extlink&oid=6518256 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph c(3) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Other Comprehensive Income -URI http://asc.fasb.org/extlink&oid=6519514 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 30 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Comprehensive Income -URI http://asc.fasb.org/extlink&oid=16317811 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=20435746&loc=d3e557-108580 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph A5 -Appendix A + Details
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