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Fair Value Fair Value of Assets and Liabilities Measured on Recurring and Nonrecurring Basis (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
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Dec. 31, 2011 | Dec. 31, 2012 Carrying (Reported) Amount, Fair Value Disclosure [Member] Fair Value, Inputs, Level 1 [Member] | Dec. 31, 2011 Carrying (Reported) Amount, Fair Value Disclosure [Member] Fair Value, Inputs, Level 1 [Member] | Dec. 31, 2012 Portion at Fair Value, Fair Value Disclosure [Member] Fair Value, Inputs, Level 1 [Member] | Dec. 31, 2011 Portion at Fair Value, Fair Value Disclosure [Member] Fair Value, Inputs, Level 1 [Member] | Dec. 31, 2012 Other Current Assets [Member] Carrying (Reported) Amount, Fair Value Disclosure [Member] Fair Value, Inputs, Level 2 [Member] | Dec. 31, 2011 Other Current Assets [Member] Carrying (Reported) Amount, Fair Value Disclosure [Member] Fair Value, Inputs, Level 2 [Member] | Dec. 31, 2012 Other Current Assets [Member] Estimate of Fair Value, Fair Value Disclosure [Member] Fair Value, Inputs, Level 2 [Member] | Dec. 31, 2011 Other Current Assets [Member] Estimate of Fair Value, Fair Value Disclosure [Member] Fair Value, Inputs, Level 2 [Member] | Dec. 31, 2012 Accrued Liabilities [Member] Carrying (Reported) Amount, Fair Value Disclosure [Member] Fair Value, Inputs, Level 2 [Member] | Dec. 31, 2011 Accrued Liabilities [Member] Carrying (Reported) Amount, Fair Value Disclosure [Member] Fair Value, Inputs, Level 2 [Member] | Dec. 31, 2012 Accrued Liabilities [Member] Estimate of Fair Value, Fair Value Disclosure [Member] Fair Value, Inputs, Level 2 [Member] | Dec. 31, 2011 Accrued Liabilities [Member] Estimate of Fair Value, Fair Value Disclosure [Member] Fair Value, Inputs, Level 2 [Member] | Dec. 31, 2012 Other Assets [Member] Carrying (Reported) Amount, Fair Value Disclosure [Member] Fair Value, Inputs, Level 2 [Member] | Dec. 31, 2011 Other Assets [Member] Carrying (Reported) Amount, Fair Value Disclosure [Member] Fair Value, Inputs, Level 2 [Member] | Dec. 31, 2012 Other Assets [Member] Estimate of Fair Value, Fair Value Disclosure [Member] Fair Value, Inputs, Level 2 [Member] | Dec. 31, 2011 Other Assets [Member] Estimate of Fair Value, Fair Value Disclosure [Member] Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other Cash Equivalents, at Carrying Value |  | $ 6.5 | $ 36.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash Equivalents, Fair Value Disclosure |  |  |  | 6.5 | 36.0 |  |  |  |  |  |  |  |  |  |  |  |
Payments to Acquire Equipment on Lease | 18.6 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign Currency Contract, Asset, Fair Value Disclosure |  |  |  |  |  | 2.3 | 0.1 | 2.3 | 0.1 |  |  |  |  | 0 | 0.1 | 0 | 0.1
Foreign Currency Contracts, Liability, Fair Value Disclosure |  |  |  |  |  |  |  |  |  | $ 0 | $ 5.6 | $ 0 | $ 5.6 |  |  |  |
Loss on write-down of equipment | 5.3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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- Definition This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Cash equivalents, including items classified as marketable securities, include short-term, highly liquid investments that are both readily convertible to known amounts of cash, and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Compensating balance arrangements that do not legally restrict the withdrawal or usage of cash equivalents may be reported as cash equivalents, while legally restricted equivalents held as compensating balances against borrowing arrangements, contracts entered into with others, or company statements of intention with regard to particular equivalents are not generally reported as part of unrestricted cash equivalents. + References No definition available. + Details
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- Definition A loss recorded to cost of goods sold relating to the write-down of the portion of purchased equipment, that will not be utilized in production, to its net realizable value. + References No definition available. + Details
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Period Type: | duration

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- Details
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X
- Definition This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents contracts related to the exchange of different currencies, including foreign currency options, forward (delivery or nondelivery) contracts, and swaps entered into and existing as of the balance sheet date. + References No definition available. + Details
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X
- Definition This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents contracts related to the exchange of different currencies, including foreign currency options, forward (delivery or nondelivery) contracts, and swaps entered into and existing as of the balance sheet date. + References No definition available. + Details
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X
- Definition Other (not elsewhere specified in the taxonomy) short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three-years ago does not become a cash equivalent when its remaining maturity is three months. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash Equivalents -URI http://asc.fasb.org/extlink&oid=6507016 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 8, 9 -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. + Details
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- Definition The cash outflow for payments to acquire rented equipment which is recorded as an asset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 15 -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 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3213-108585 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 17 -Subparagraph c -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. + Details
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