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Income Taxes Effective Income Tax Rate (Narrative) (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions | $ 0.0 | $ 10.5 | $ 6.1
Income tax expense (benefit), change in estimate |  | 3.4 | 4.8
Other Tax Expense (Benefit) |  | 20.1 |
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability |  |  | (8.5)
Unrecognized tax benefits, decrease resulting from cash and non-cash settlements with taxing authorities |  |  | 8.4
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities |  |  | $ 4.7
Mexican Tax Authority [Member] |  |  |
Previously enacted tax rate |  |  | 17.50%
Newly enacted tax rate |  |  | 30.00%
Tax positions relating to transfer pricing [Member] |  |  |
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions | $ 11.5 | $ 23.1 |

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- Definition This figure represents the new tax rate that was enacted during the period. + References No definition available. + Details
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- Definition This figure represents the tax rate in effect prior to a change in enacted tax rate that occurred during the period. + References No definition available. + Details
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- Definition Amount of total decrease in unrecognized tax benefits resulting from both cash and non-cash settlements with taxing authorities. + References No definition available. + Details
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- Definition Amount of income tax expense (benefit) from continuing operations attributable to an adjustment of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319 + Details
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- Definition Amount of other income tax expense (benefit). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)(1)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32672-109319 + Details
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- Definition Amount of decrease in unrecognized tax benefits resulting from settlements with taxing authorities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=6907707&loc=SL6600010-109319 + Details
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- Definition Amount of increase in unrecognized tax benefits resulting from tax positions taken in prior period tax returns. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6907707&loc=SL6600010-109319 + Details
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