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Pension and Other Postemployment Benefits (Tables) | 12 Months Ended
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Dec. 31, 2011
Defined Benefit Pension Plans [Member] |
Components of Net Periodic Benefit Cost [Table Text Block] | The components of net periodic benefit cost for the three years ended December 31, 2011 were (in millions):
| 2011 |  | 2010 |  | 2009
Service cost | $ | 5.8 |  |  | $ | 3.9 |  |  | $ | 4.4 |
Interest cost | 6.5 |  |  | 6.1 |  |  | 6.7 |
Expected return on plan assets | (3.5 | ) |  | (3.5 | ) |  | (3.6 | )
Amortization of prior service cost | 3.1 |  |  | 2.5 |  |  | 2.5 |
Amortization of actuarial (gains) losses | 0.3 |  |  | 0.6 |  |  | 1.6 |
Curtailments and settlements | — |  |  | 1.2 |  |  | 1.4 |
| $ | 12.2 |  |  | $ | 10.8 |  |  | $ | 13.0 |
Weighted Average Assumptions Used to Determine Net Periodic Benefit Cost [Table Text Block] | The weighted average assumptions used to determine net periodic benefit cost for the three years ended December 31, 2011 were:
| 2011 |  | 2010 |  | 2009
Discount rate | 5.1 | % |  | 5.6 | % |  | 5.6 | %
Compensation increases | 1.6 | % |  | 2.3 | % |  | 2.1 | %
Expected return on plan assets | 6.2 | % |  | 6.7 | % |  | 6.4 | %
Amounts Recorded in Balance Sheet [Table Text Block] | At December 31, 2011 and 2010 the funded status was classified as follows (in millions):
| 2011 |  | 2010
Other assets | $ | 1.9 |  |  | $ | 3.0 |
Other current liabilities | (1.3 | ) |  | (1.1 | )
Long-term liabilities | (96.4 | ) |  | (78.0 | )
| $ | (95.8 | ) |  | $ | (76.1 | )
Plans with Benefit Obligations in Excess of Plan Assets [Table Text Block] | At December 31, 2011 and 2010, plans with benefit obligations in excess of plan assets were (in millions):
| 2011 |  | 2010
Benefit obligation | $ | 136.4 |  |  | $ | 114.1 |
Plan assets | 38.7 |  |  | 35.0 |
| $ | 97.7 |  |  | $ | 79.1 |
Weighted Average Assumptions Used to Determine Benefit Obligation [Table Text Block] | At December 31, 2011 and 2010, the weighted average assumptions used to determine the benefit obligation were:
| 2011 |  | 2010
Discount rate | 4.6 | % |  | 5.0 | %
Compensation increases | 1.4 | % |  | 1.9 | %
Estimated Future Benefit Payments [Table Text Block] | At December 31, 2011, the estimated future benefit payments expected to be paid are (in millions):
2012 | $ | 4.1 |
2013 | 4.9 |
2014 | 7.7 |
2015 | 5.5 |
2016 | 5.8 |
2017 -2021 | 41.4 |
Thereafter | 76.9 |
| $ | 146.3 |
Fair Value of Plan Assets [Table Text Block] | The fair value of plan assets at December 31, 2011 and 2010 were (in millions):
| Level 1 |  | Level 2 |  | Level 3 |  | Total
2011 |  |  |  |  |  |  |
Cash | $ | 1.6 |  |  |  |  |  |  | $ | 1.6 |
Mutual funds (a) | 29.7 |  |  |  |  |  |  | 29.7 |
Unit trusts (b) | 17.3 |  |  |  |  |  |  | 17.3 |
Insurance contracts (c) | — |  |  |  |  | $ | 1.7 |  |  | 1.7 |
Other (d) | — |  |  | $ | 0.2 |  |  | — |  |  | 0.2 |
| $ | 48.6 |  |  | $ | 0.2 |  |  | $ | 1.7 |  |  | $ | 50.5 |
________________
(a) | Equity funds represent 67% of the total and are primarily composed of U.S. large-cap and mid-cap companies, international companies and emerging market companies. Debt funds represent 33% of the total and are primarily composed of U.S. Treasury securities, corporate debt and mortgage securities.
(b) | Equity funds represent 46% of the total and are primarily composed of U.K. large-cap companies and U.K., U.S. and eurozone equity index funds. Debt funds represent 54% of the total and are composed of U.K. government bonds and U.K. and eurozone corporate bonds.
(c) | Insurance contracts are primarily composed of guaranteed insurance contracts.
(d) | Commingled short-term investment funds.
| Level 1 |  | Level 2 |  | Level 3 |  | Total
2010 |  |  |  |  |  |  |
Cash | $ | 1.0 |  |  |  |  |  |  | $ | 1.0 |
Mutual funds (a) | 24.9 |  |  |  |  |  |  | 24.9 |
Unit trusts (b) | 18.8 |  |  |  |  |  |  | 18.8 |
Insurance contracts (c) | — |  |  |  |  | $ | 6.1 |  |  | 6.1 |
Other (d) | — |  |  | $ | 3.1 |  |  | — |  |  | 3.1 |
| $ | 44.7 |  |  | $ | 3.1 |  |  | $ | 6.1 |  |  | $ | 53.9 |
________________
(a) | Equity funds represent 63% of the total and are primarily composed of U.S. large-cap and mid-cap companies, international companies and emerging market companies. Debt funds represent 37% of the total and are primarily composed of U.S. Treasury securities, corporate debt and mortgage securities.
(b) | Equity funds represent 54% of the total and are primarily composed of U.K. large-cap companies and U.K., U.S. and eurozone equity index funds. Debt funds represent 46% of the total and are composed of U.K. government bonds and U.K. and eurozone corporate bonds.
(c) | Insurance contracts are primarily composed of guaranteed insurance contracts.
(d) | Commingled short-term investment funds.
Changes in Fair Value of Plan Assets Measured Using Level 3 Inputs [Table Text Block] | At December 31, 2011 and 2010, changes in the fair value of plan assets measured using Level 3 inputs were (in millions):
| 2011 |  | 2010
Beginning balance January 1 | $ | 6.1 |  |  | $ | 5.6 |
Actual return on assets | 0.1 |  |  | 0.1 |
Purchases, sales and settlements, net | (4.5 | ) |  | 0.4 |
Balance December 31 | $ | 1.7 |  |  | $ | 6.1 |
Weighted Average Plan Asset Allocations [Table Text Block] | The weighted average asset allocations at December 31, 2011 and 2010 were:
| 2011 |  | 2010
| Target Allocation |  | Actual Allocation |  | Actual Allocation
Cash | 2 | % |  | 3 | % |  | 2 | %
Mutual funds | 55 | % |  | 59 | % |  | 46 | %
Unit trusts | 37 | % |  | 34 | % |  | 35 | %
Insurance contracts | 3 | % |  | 3 | % |  | 11 | %
Other | 3 | % |  | 1 | % |  | 6 | %
| 100 | % |  | 100 | % |  | 100 | %
Postemployment Arrangements [Member] |
Components of Net Periodic Benefit Cost [Table Text Block] | The components of net periodic benefit cost for the three years ended December 31, 2011 were (in millions):
| 2011 |  | 2010 |  | 2009
Service cost | $ | 3.9 |  |  | $ | 1.8 |  |  | $ | 1.8 |
Interest cost | 4.7 |  |  | 3.9 |  |  | 4.0 |
Amortization of prior service cost | 0.6 |  |  | 0.6 |  |  | 0.8 |
Amortization of actuarial (gains) losses | 2.1 |  |  | 1.0 |  |  | 0.5 |
| $ | 11.3 |  |  | $ | 7.3 |  |  | $ | 7.1 |
Weighted Average Assumptions Used to Determine Net Periodic Benefit Cost [Table Text Block] | The weighted average assumptions used to determine net periodic benefit cost for the three years ended December 31, 2011 were:
| 2011 |  | 2010 |  | 2009
Discount rate | 5.0 | % |  | 5.0 | % |  | 5.3 | %
Compensation increases | 3.5 | % |  | 3.5 | % |  | 3.5 | %
Benefit Obligation, Fair Value of Plan Assets and Funded Status of Defined Benefit Pension Plans [Table Text Block] | At December 31, 2011 and 2010, the benefit obligation, fair value of plan assets and the funded status of our defined benefit pension plans were (in millions):
| 2011 |  | 2010
Benefit Obligation |  |  |
Benefit obligation January 1 | $ | 130.0 |  |  | $ | 120.9 |
Service cost | 5.8 |  |  | 3.9 |
Interest cost | 6.5 |  |  | 6.1 |
Amendments, curtailments, and settlements | (13.6 | ) |  | 2.6 |
Actuarial (gains) losses | 23.1 |  |  | 7.2 |
Benefits paid | (5.1 | ) |  | (10.3 | )
Foreign currency translation | (0.4 | ) |  | (0.4 | )
Benefit obligation December 31 | $ | 146.3 |  |  | $ | 130.0 |
Fair Value of Plan Assets |  |  |
Fair value of assets January 1 | $ | 53.9 |  |  | $ | 52.4 |
Actual return on plan assets | (0.6 | ) |  | 4.5 |
Employer contributions | 7.8 |  |  | 7.5 |
Benefits paid | (5.1 | ) |  | (10.3 | )
Settlements | (5.4 | ) |  | — |
Foreign currency translation | (0.1 | ) |  | (0.2 | )
Fair value of plan assets December 31 | $ | 50.5 |  |  | $ | 53.9 |
Funded Status December 31 | $ | (95.8 | ) |  | $ | (76.1 | )
Benefit Obligation [Table Text Block] | At December 31, 2011 and 2010, the benefit obligation was (in millions):
| 2011 |  | 2010
Benefit obligation January 1 | $ | 104.7 |  |  | $ | 87.7 |
Service cost | 3.9 |  |  | 1.8 |
Interest cost | 4.7 |  |  | 3.9 |
Plan amendment | — |  |  | 20.4 |
Actuarial (gains) losses | 2.6 |  |  | 0.9 |
Benefits paid | (10.7 | ) |  | (10.0 | )
Benefit obligation December 31 | $ | 105.2 |  |  | $ | 104.7 |
Amounts Recorded in Balance Sheet [Table Text Block] | At December 31, 2011 and 2010, the liability was classified as follows (in millions):
| 2011 |  | 2010
Other current liabilities | $ | 10.2 |  |  | $ | 10.7 |
Long-term liabilities | 95.0 |  |  | 94.0 |
| $ | 105.2 |  |  | $ | 104.7 |
Weighted Average Assumptions Used to Determine Benefit Obligation [Table Text Block] | At December 31, 2011 and 2010, the weighted average assumptions used to determine the benefit obligation were:
| 2011 |  | 2010
Discount rate | 4.9 | % |  | 5.0 | %
Compensation increases | 3.5 | % |  | 3.5 | %
Estimated Future Benefit Payments [Table Text Block] | At December 31, 2011, the estimated future benefit payments expected to be paid are (in millions):
2012 | $ | 10.2 |
2013 | 9.8 |
2014 | 8.3 |
2015 | 7.2 |
2016 | 7.5 |
2017 - 2021 | 28.1 |
Thereafter | 34.1 |
| $ | 105.2 |

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- Definition Tabular disclosure of the aggregate benefit obligation and aggregate fair value of plan assets for pension plans and/or other employee benefit plans with benefit obligations in excess of plan assets as of the measurement date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Topic 715 -SubTopic 20 -Publisher FASB -Number -Article -Subparagraph (a) -Name Accounting Standards Codification -Paragraph 3 -Section 50 -URI http://asc.fasb.org/extlink&oid=6962843&loc=d3e2417-114920 + Details
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- Definition Tabular disclosure of the change in the benefit obligation of pension plans and/or other employee benefit plans from the beginning to the end of the period, showing separately, if applicable, the effects of the following: service cost, interest cost, contributions by plan participants, actuarial gains and losses, foreign currency exchange rate changes, benefits paid, plan amendments, business combinations, divestitures, curtailments, settlements, and special and contractual termination benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Topic 715 -SubTopic 20 -Publisher FASB -Number -Article -Subparagraph (a) -Name Accounting Standards Codification -Paragraph 1 -Section 50 -URI http://asc.fasb.org/extlink&oid=6962843&loc=d3e1928-114920 + Details
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- Definition Tabular disclosure of one or more of the entity's defined benefit pension plans or one or more other defined benefit postretirement plans, separately for pension plans and other postretirement benefit plans including the entity's schedule of fair value of plan assets for defined benefit or other postretirement plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6962843&loc=d3e2417-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 158 -Paragraph 4, 7, 16, 20, 21 -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 -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6962843&loc=d3e1928-114920 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5, 6, 7 -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 Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph d -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 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6962843&loc=d3e2410-114920 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=6930749&loc=d3e4179-114921 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6962843&loc=d3e2439-114920 + Details
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- Definition Tabular disclosure of benefits expected to be paid by pension plans and/or other employee benefit plans in each of the next five fiscal years and in the aggregate for the five fiscal years thereafter. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Topic 715 -SubTopic 20 -Publisher FASB -Number -Article -Subparagraph (f) -Name Accounting Standards Codification -Paragraph 1 -Section 50 -URI http://asc.fasb.org/extlink&oid=6962843&loc=d3e1928-114920 + Details
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- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Topic 715 -SubTopic 20 -Publisher FASB -Number -Article -Subparagraph (h) -Name Accounting Standards Codification -Paragraph 1 -Section 50 -URI http://asc.fasb.org/extlink&oid=6962843&loc=d3e1928-114920 + Details
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