v2.4.0.6
Employee Benefit And Retirement Plans Defined Benefit Plan, Fair Value of Plan Assets Disclosures (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Fair Value, Inputs, Level 3 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets $ 74.6 $ 73.1 $ 66.2
Partnership Interest [Member] | Fair Value, Inputs, Level 3 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 46.3 47.4 34.9
Real Estate Funds [Member] | Fair Value, Inputs, Level 3 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 28.3 25.2 25.2
Pension Assets, Other [Member] | Fair Value, Inputs, Level 3 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 0.5 6.1
U.S. [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 634.9 635.0 576.9
Pension Plan Asset Category as Percent of Total Pension Assets, Percentage 100.00% 100.00% 100.00%
U.S. [Member] | Fair Value, Inputs, Level 1 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 309.7 0  
U.S. [Member] | Fair Value, Inputs, Level 2 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 256.5 572.6  
U.S. [Member] | Fair Value, Inputs, Level 3 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 68.7 62.4  
U.S. [Member] | U.S. Large Cap Equity [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 121.2 [1],[2] 155.0  
U.S. [Member] | U.S. Large Cap Equity [Member] | Fair Value, Inputs, Level 1 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 70.8 [1],[2] 0  
U.S. [Member] | U.S. Large Cap Equity [Member] | Fair Value, Inputs, Level 2 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 50.4 [1],[2] 155.0  
U.S. [Member] | U.S. Large Cap Equity [Member] | Fair Value, Inputs, Level 3 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 [1],[2] 0  
U.S. [Member] | U.S. Small Cap Equity [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 23.1 [1],[2] 30.6  
U.S. [Member] | U.S. Small Cap Equity [Member] | Fair Value, Inputs, Level 1 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 23.1 [1],[2] 0  
U.S. [Member] | U.S. Small Cap Equity [Member] | Fair Value, Inputs, Level 2 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 [1],[2] 30.6  
U.S. [Member] | U.S. Small Cap Equity [Member] | Fair Value, Inputs, Level 3 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 [1],[2] 0  
U.S. [Member] | International Equity [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 109.6 [1],[2] 130.0  
U.S. [Member] | International Equity [Member] | Fair Value, Inputs, Level 1 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 25.6 [1],[2] 0  
U.S. [Member] | International Equity [Member] | Fair Value, Inputs, Level 2 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 84.0 [1],[2] 130.0  
U.S. [Member] | International Equity [Member] | Fair Value, Inputs, Level 3 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 [1],[2] 0  
U.S. [Member] | Equity Securities, Entity Size [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 253.9 [1],[2] 315.6  
Pension Plan Asset Category as Percent of Total Pension Assets, Percentage 40.00% 50.00% 53.00%
U.S. [Member] | Equity Securities, Entity Size [Member] | Fair Value, Inputs, Level 1 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 119.5 [1],[2] 0  
U.S. [Member] | Equity Securities, Entity Size [Member] | Fair Value, Inputs, Level 2 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 134.4 [1],[2] 315.6  
U.S. [Member] | Equity Securities, Entity Size [Member] | Fair Value, Inputs, Level 3 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 [1],[2] 0  
U.S. [Member] | US Treasury Securities [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 72.0 [1],[3] 71.5  
U.S. [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 1 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 56.3 [1],[3] 0  
U.S. [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 2 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 15.7 [1],[3] 71.5  
U.S. [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 3 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 [1],[3] 0  
U.S. [Member] | Other Government [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 31.0 [1],[3] 31.4  
U.S. [Member] | Other Government [Member] | Fair Value, Inputs, Level 1 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 16.9 [1],[3] 0  
U.S. [Member] | Other Government [Member] | Fair Value, Inputs, Level 2 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 14.1 [1],[3] 31.4  
U.S. [Member] | Other Government [Member] | Fair Value, Inputs, Level 3 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 [1],[3] 0  
U.S. [Member] | Asset-backed Securities [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 17.4 [1],[3] 10.0  
U.S. [Member] | Asset-backed Securities [Member] | Fair Value, Inputs, Level 1 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 [1],[3] 0  
U.S. [Member] | Asset-backed Securities [Member] | Fair Value, Inputs, Level 2 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 17.4 [1],[3] 10.0  
U.S. [Member] | Asset-backed Securities [Member] | Fair Value, Inputs, Level 3 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 [1],[3] 0  
U.S. [Member] | Corporate Bond Securities [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 158.7 [1],[3] 110.8  
U.S. [Member] | Corporate Bond Securities [Member] | Fair Value, Inputs, Level 1 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 117.0 [1],[3] 0  
U.S. [Member] | Corporate Bond Securities [Member] | Fair Value, Inputs, Level 2 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 41.7 [1],[3] 110.8  
U.S. [Member] | Corporate Bond Securities [Member] | Fair Value, Inputs, Level 3 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 [1],[3] 0  
U.S. [Member] | Short-term Investments [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 7.2 [1],[3] 7.9  
U.S. [Member] | Short-term Investments [Member] | Fair Value, Inputs, Level 1 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 [1],[3] 0  
U.S. [Member] | Short-term Investments [Member] | Fair Value, Inputs, Level 2 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 7.2 [1],[3] 7.9  
U.S. [Member] | Short-term Investments [Member] | Fair Value, Inputs, Level 3 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 [1],[3] 0  
U.S. [Member] | Fixed Income Investments [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 286.3 [1],[3] 231.6  
Pension Plan Asset Category as Percent of Total Pension Assets, Percentage 45.00% 36.00% 33.00%
U.S. [Member] | Fixed Income Investments [Member] | Fair Value, Inputs, Level 1 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 190.2 [1],[3] 0  
U.S. [Member] | Fixed Income Investments [Member] | Fair Value, Inputs, Level 2 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 96.1 [1],[3] 231.6  
U.S. [Member] | Fixed Income Investments [Member] | Fair Value, Inputs, Level 3 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 [1],[3] 0  
U.S. [Member] | Insurance Contracts [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 18.4 [4] 17.5  
Pension Plan Asset Category as Percent of Total Pension Assets, Percentage 3.00% 3.00% 3.00%
U.S. [Member] | Insurance Contracts [Member] | Fair Value, Inputs, Level 1 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 [4] 0  
U.S. [Member] | Insurance Contracts [Member] | Fair Value, Inputs, Level 2 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 18.4 [4] 17.5  
U.S. [Member] | Insurance Contracts [Member] | Fair Value, Inputs, Level 3 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 [4] 0  
U.S. [Member] | Partnership Interest [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 47.8 [5] 45.1  
Pension Plan Asset Category as Percent of Total Pension Assets, Percentage 7.00% 7.00% 6.00%
U.S. [Member] | Partnership Interest [Member] | Fair Value, Inputs, Level 1 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 [5] 0  
U.S. [Member] | Partnership Interest [Member] | Fair Value, Inputs, Level 2 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 1.8 [5] 2.4  
U.S. [Member] | Partnership Interest [Member] | Fair Value, Inputs, Level 3 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 46.0 [5] 42.7  
U.S. [Member] | Real Estate Funds [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 22.7 [6] 19.2  
Pension Plan Asset Category as Percent of Total Pension Assets, Percentage 4.00% 3.00% 3.00%
U.S. [Member] | Real Estate Funds [Member] | Fair Value, Inputs, Level 1 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 [6] 0  
U.S. [Member] | Real Estate Funds [Member] | Fair Value, Inputs, Level 2 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 [6] 0  
U.S. [Member] | Real Estate Funds [Member] | Fair Value, Inputs, Level 3 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 22.7 [6] 19.2  
U.S. [Member] | Cash and Cash Equivalents [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 5.8 [7] 5.5  
Pension Plan Asset Category as Percent of Total Pension Assets, Percentage 1.00% 1.00% 1.00%
U.S. [Member] | Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 [7] 0  
U.S. [Member] | Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 2 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 5.8 [7] 5.5  
U.S. [Member] | Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 3 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 [7] 0  
U.S. [Member] | Pension Assets, Other [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 0.5  
Pension Plan Asset Category as Percent of Total Pension Assets, Percentage 0.00% 0.00% 1.00%
U.S. [Member] | Pension Assets, Other [Member] | Fair Value, Inputs, Level 1 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 0  
U.S. [Member] | Pension Assets, Other [Member] | Fair Value, Inputs, Level 2 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 0  
U.S. [Member] | Pension Assets, Other [Member] | Fair Value, Inputs, Level 3 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 0.5  
International [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 484.5 426.3 410.6
Pension Plan Asset Category as Percent of Total Pension Assets, Percentage 100.00% 100.00% 100.00%
International [Member] | Fair Value, Inputs, Level 1 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 243.4 109.2  
International [Member] | Fair Value, Inputs, Level 2 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 235.2 306.4  
International [Member] | Fair Value, Inputs, Level 3 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 5.9 10.7  
International [Member] | U.S. Large Cap Equity [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 9.9 [1],[2] 19.1  
International [Member] | U.S. Large Cap Equity [Member] | Fair Value, Inputs, Level 1 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 8.2 [1],[2] 0  
International [Member] | U.S. Large Cap Equity [Member] | Fair Value, Inputs, Level 2 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 1.7 [1],[2] 19.1  
International [Member] | U.S. Large Cap Equity [Member] | Fair Value, Inputs, Level 3 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 [1],[2] 0  
International [Member] | U.S. Small Cap Equity [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 [1],[2] 5.8  
International [Member] | U.S. Small Cap Equity [Member] | Fair Value, Inputs, Level 1 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 [1],[2] 5.8  
International [Member] | U.S. Small Cap Equity [Member] | Fair Value, Inputs, Level 2 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 [1],[2] 0  
International [Member] | U.S. Small Cap Equity [Member] | Fair Value, Inputs, Level 3 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 [1],[2] 0  
International [Member] | International Equity [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 45.1 [1],[2] 103.1  
International [Member] | International Equity [Member] | Fair Value, Inputs, Level 1 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 42.0 [1],[2] 55.6  
International [Member] | International Equity [Member] | Fair Value, Inputs, Level 2 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 3.1 [1],[2] 47.5  
International [Member] | International Equity [Member] | Fair Value, Inputs, Level 3 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 [1],[2] 0  
International [Member] | Equity Securities, Entity Size [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 55.0 [1],[2] 128.0  
Pension Plan Asset Category as Percent of Total Pension Assets, Percentage 11.00% 30.00% 18.00%
International [Member] | Equity Securities, Entity Size [Member] | Fair Value, Inputs, Level 1 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 50.2 [1],[2] 61.4  
International [Member] | Equity Securities, Entity Size [Member] | Fair Value, Inputs, Level 2 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 4.8 [1],[2] 66.6  
International [Member] | Equity Securities, Entity Size [Member] | Fair Value, Inputs, Level 3 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 [1],[2] 0  
International [Member] | US Treasury Securities [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 [1],[3] 0  
International [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 1 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 [1],[3] 0  
International [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 2 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 [1],[3] 0  
International [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 3 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 [1],[3] 0  
International [Member] | Other Government [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 32.3 [1],[3] 17.3  
International [Member] | Other Government [Member] | Fair Value, Inputs, Level 1 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 32.3 [1],[3] 17.3  
International [Member] | Other Government [Member] | Fair Value, Inputs, Level 2 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 [1],[3] 0  
International [Member] | Other Government [Member] | Fair Value, Inputs, Level 3 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 [1],[3] 0  
International [Member] | Asset-backed Securities [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 [1],[3] 0  
International [Member] | Asset-backed Securities [Member] | Fair Value, Inputs, Level 1 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 [1],[3] 0  
International [Member] | Asset-backed Securities [Member] | Fair Value, Inputs, Level 2 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 [1],[3] 0  
International [Member] | Asset-backed Securities [Member] | Fair Value, Inputs, Level 3 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 [1],[3] 0  
International [Member] | Corporate Bond Securities [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 58.6 [1],[3] 71.5  
International [Member] | Corporate Bond Securities [Member] | Fair Value, Inputs, Level 1 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 52.5 [1],[3] 6.0  
International [Member] | Corporate Bond Securities [Member] | Fair Value, Inputs, Level 2 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 6.1 [1],[3] 65.5  
International [Member] | Corporate Bond Securities [Member] | Fair Value, Inputs, Level 3 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 [1],[3] 0  
International [Member] | Short-term Investments [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 [1],[3] 0  
International [Member] | Short-term Investments [Member] | Fair Value, Inputs, Level 1 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 [1],[3] 0  
International [Member] | Short-term Investments [Member] | Fair Value, Inputs, Level 2 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 [1],[3] 0  
International [Member] | Short-term Investments [Member] | Fair Value, Inputs, Level 3 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 [1],[3] 0  
International [Member] | Fixed Income Investments [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 90.9 [1],[3] 88.8  
Pension Plan Asset Category as Percent of Total Pension Assets, Percentage 19.00% 21.00% 20.00%
International [Member] | Fixed Income Investments [Member] | Fair Value, Inputs, Level 1 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 84.8 [1],[3] 23.3  
International [Member] | Fixed Income Investments [Member] | Fair Value, Inputs, Level 2 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 6.1 [1],[3] 65.5  
International [Member] | Fixed Income Investments [Member] | Fair Value, Inputs, Level 3 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 [1],[3] 0  
International [Member] | Insurance Contracts [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 178.5 [4] 100.8  
Pension Plan Asset Category as Percent of Total Pension Assets, Percentage 37.00% 24.00% 26.00%
International [Member] | Insurance Contracts [Member] | Fair Value, Inputs, Level 1 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 [4] 0  
International [Member] | Insurance Contracts [Member] | Fair Value, Inputs, Level 2 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 178.5 [4] 100.8  
International [Member] | Insurance Contracts [Member] | Fair Value, Inputs, Level 3 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 [4] 0  
International [Member] | Partnership Interest [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 23.4 [5] 40.3  
Pension Plan Asset Category as Percent of Total Pension Assets, Percentage 5.00% 9.00% 7.00%
International [Member] | Partnership Interest [Member] | Fair Value, Inputs, Level 1 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 17.6 [5] 17.0  
International [Member] | Partnership Interest [Member] | Fair Value, Inputs, Level 2 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 5.5 [5] 18.6  
International [Member] | Partnership Interest [Member] | Fair Value, Inputs, Level 3 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0.3 [5] 4.7  
International [Member] | Real Estate Funds [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 9.1 [6] 9.7  
Pension Plan Asset Category as Percent of Total Pension Assets, Percentage 2.00% 2.00% 2.00%
International [Member] | Real Estate Funds [Member] | Fair Value, Inputs, Level 1 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 3.5 [6] 2.2  
International [Member] | Real Estate Funds [Member] | Fair Value, Inputs, Level 2 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 [6] 1.5  
International [Member] | Real Estate Funds [Member] | Fair Value, Inputs, Level 3 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 5.6 [6] 6.0  
International [Member] | Cash and Cash Equivalents [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 68.5 [7] 39.5  
Pension Plan Asset Category as Percent of Total Pension Assets, Percentage 14.00% 9.00% 24.00%
International [Member] | Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 68.4 [7] 5.3  
International [Member] | Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 2 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0.1 [7] 34.2  
International [Member] | Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 3 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 [7] 0  
International [Member] | Pension Assets, Other [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 59.1 19.2  
Pension Plan Asset Category as Percent of Total Pension Assets, Percentage 12.00% 5.00% 3.00%
International [Member] | Pension Assets, Other [Member] | Fair Value, Inputs, Level 1 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 18.9 0  
International [Member] | Pension Assets, Other [Member] | Fair Value, Inputs, Level 2 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 40.2 19.2  
International [Member] | Pension Assets, Other [Member] | Fair Value, Inputs, Level 3 [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets $ 0 $ 0  
[1] In the U.S. pension plan assets, certain changes were made to the equity and fixed income investments which resulted in transfers of pension plan assets from certain common/collective trust funds into separately managed investment accounts. The underlying investments in these separately managed accounts are primarily publicly-traded securities, and such investments have been valued using the quoted price as of December 31, 2011. Accordingly, these investments have been classified as Level 1 as of December 31, 2011.
[2] Equity securities are primarily comprised of mutual funds and common/collective trust funds. Investments in mutual funds and common/collective trust funds are valued at the net asset value per share or unit multiplied by the number of shares or units held as of the measurement date. The common/collective trust funds are generally actively managed investment vehicles.
[3] Fixed income investments are primarily comprised of mutual funds and common/collective trust funds that invest in corporate and government bonds. Investments in mutual funds and common/collective trust funds are valued at the net asset value per share or unit multiplied by the number of shares or units held as of the measurement date. The investments in fixed income securities include both actively managed funds and index funds.
[4] The fair values of insurance contracts are estimated based on the future cash flows to be received under the contracts discounted to the present using a discount rate that approximates the discount rate used to measure the associated pension plan liabilities.
[5] Venture capital and partnerships are valued at net asset value, which is generally calculated using the most recent partnership financial reports.
[6] Real estate investments are generally investments in limited partnerships, real estate investment trusts and similar vehicles that invest in real estate. The values of the investments are generally based on the most recent financial reports of the investment vehicles. The managers of each of the investment vehicles estimate the values of the real estate assets underlying the real estate investments using third-party appraisals and other valuation techniques and analysis.
[7] Cash and cash equivalents include investments in stable value funds. Stable value funds are generally invested in common trust funds and interest-bearing accounts.