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Goodwill and Other intangible assets - Intangible Assets (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013 | Dec. 31, 2013
Intangible Assets, Combined Indefinite lived and Finite lived Intangible Assets by Major Class [Line Items] |  |  |  |  |
Gross carrying amount total | $ 809.6 |  | $ 809.6 |  | $ 806.9
Accumulated amortization | 66.1 |  | 66.1 |  | 56.8
Net carrying amount | 743.5 |  | 743.5 |  | 750.1
Finite-Lived Intangible Assets, Net [Abstract] |  |  |  |  |
Amortization expense relating to intangible assets | 4.7 | 4.6 | 9.1 | 6.2 |
Trade Names [Member] |  |  |  |  |
Intangible Assets, Combined Indefinite lived and Finite lived Intangible Assets by Major Class [Line Items] |  |  |  |  |
Gross carrying amount total | 575.1 |  | 575.1 |  | 575.3
Accumulated amortization | 0 |  | 0 |  | 0
Net carrying amount | 575.1 |  | 575.1 |  | 575.3
Contractual or Distributer Relationships [Member] |  |  |  |  |
Intangible Assets, Combined Indefinite lived and Finite lived Intangible Assets by Major Class [Line Items] |  |  |  |  |
Gross carrying amount total | 89.8 |  | 89.8 |  | 90.0
Accumulated amortization | 7.7 |  | 7.7 |  | 4.7
Net carrying amount | 82.1 |  | 82.1 |  | 85.3
Useful life (in years) |  |  | 15 years |  |
Technology [Member] |  |  |  |  |
Intangible Assets, Combined Indefinite lived and Finite lived Intangible Assets by Major Class [Line Items] |  |  |  |  |
Gross carrying amount total | 93.8 |  | 93.8 |  | 93.2
Accumulated amortization | 29.2 |  | 29.2 |  | 25.5
Net carrying amount | 64.6 |  | 64.6 |  | 67.7
Technology [Member] | Minimum [Member] |  |  |  |  |
Intangible Assets, Combined Indefinite lived and Finite lived Intangible Assets by Major Class [Line Items] |  |  |  |  |
Useful life (in years) |  |  | 4 years |  |
Technology [Member] | Maximum [Member] |  |  |  |  |
Intangible Assets, Combined Indefinite lived and Finite lived Intangible Assets by Major Class [Line Items] |  |  |  |  |
Useful life (in years) |  |  | 10 years |  |
Patents, Other Trademarks and Other Trade Names [Member] |  |  |  |  |
Intangible Assets, Combined Indefinite lived and Finite lived Intangible Assets by Major Class [Line Items] |  |  |  |  |
Gross carrying amount total | 27.5 |  | 27.5 |  | 27.4
Accumulated amortization | 13.4 |  | 13.4 |  | 12.2
Net carrying amount | 14.1 |  | 14.1 |  | 15.2
Patents, Other Trademarks and Other Trade Names [Member] | Minimum [Member] |  |  |  |  |
Intangible Assets, Combined Indefinite lived and Finite lived Intangible Assets by Major Class [Line Items] |  |  |  |  |
Useful life (in years) |  |  | 5 years |  |
Patents, Other Trademarks and Other Trade Names [Member] | Maximum [Member] |  |  |  |  |
Intangible Assets, Combined Indefinite lived and Finite lived Intangible Assets by Major Class [Line Items] |  |  |  |  |
Useful life (in years) |  |  | 20 years |  |
Customer Lists [Member] |  |  |  |  |
Intangible Assets, Combined Indefinite lived and Finite lived Intangible Assets by Major Class [Line Items] |  |  |  |  |
Gross carrying amount total | 23.4 |  | 23.4 |  | 21.0
Accumulated amortization | 15.8 |  | 15.8 |  | 14.4
Net carrying amount | $ 7.6 |  | $ 7.6 |  | $ 6.6
Useful life (in years) |  |  | 5 years |  |

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- Definition Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, gross amount before accumulated amortization and impairment charges. + References No definition available. + Details
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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16212-109274 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph ((a)(1),(b)) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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