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Income Taxes (Summary Of Significant Components Of Deferred Income Tax Assets (Liabilities)) (Details) - USD ($) $ in Millions | Dec. 31, 2015 | Dec. 31, 2014
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Effective Income Tax Rate Reconciliation, Amount [Abstract] |  |
Foreign tax credits | $ 84.1 | $ 98.6
Premium on long-term debt | 86.0 | 99.2
Net operating loss carryfowards | 228.7 | 204.5
Employee benefits, including share-based compensation | 40.5 | 39.5
Deferred Tax Assets, Deferred Income | 77.7 | 103.0
Other | 20.5 | 16.7
Total deferred tax assets | 537.5 | 561.5
Valuation allowance | (266.4) | (271.3)
Net deferred tax assets | 271.1 | 290.2
Property and equipment | (97.1) | (314.2)
Intercompany transfers of property | (21.2) | (23.0)
Deferred costs | (15.3) | (20.2)
Other | (25.8) | (14.1)
Total deferred tax liabilities | 159.4 | 371.5
Net deferred tax liability | $ 111.7 |
Deferred Tax Liabilities, Net, Noncurrent |  | $ (81.3)

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- Definition Amount, after allocation of valuation allowances and deferred tax liability, of deferred tax asset attributable to deductible differences and carryforwards, netted by jurisdiction. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 + Details
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible foreign operating loss carryforwards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32621-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32632-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 20 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=51675352&loc=d3e28680-109314 + Details
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