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Pension And Postretirement Benefits (Narrative) (Details) (USD $)
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Defined Benefit Plan Disclosure [Line Items]      
Qualifying employees receive additional contribution, percentage 2.00%    
Expected rate of return on assets assumption reflected as a long-term asset allocation 8.25% 7.01%  
Global target asset allocation, equity securities minimum percentage 40.00%    
Global target asset allocation, equity securities maximum percentage 60.00%    
Global target asset allocation, fixed income securities minimum percentage 25.00%    
Global target asset allocation, fixed income securities maximum percentage 45.00%    
Global target asset allocation, alternative assets minimum percentage 0.00%    
Global target asset allocation, alternative assets maximum percentage 25.00%    
Global target asset allocation, money market minimum percentage 0.00%    
Global target asset allocation, money market maximum percentage 5.00%    
Transferred from Level 1 to Level 2   $ 111,000,000  
Transferred from Level 3 to Level 2 16,000,000    
Pension Benefits [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Estimated net gain/loss that will be amortized from accumulated other comprehensive income into net periodic benefit cost 19,200,000    
Estimated net gain/loss that will be amortized from accumulated other compreshensive income into net peridoic benefit cost, prior service cost 400,000    
Expected cash contribution based on current actuarial calculations in 2012 5,000,000    
Defined benefit plans contribution by the company 47,495,000 42,439,000  
Postretirement Benefits [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Estimated net gain/loss that will be amortized from accumulated other comprehensive income into net periodic benefit cost 100,000    
Estimated net gain/loss that will be amortized from accumulated other compreshensive income into net peridoic benefit cost, prior service cost 200,000    
Expected cash contribution based on current actuarial calculations in 2012 1,300,000    
Minimum [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Investment strategies time period, years 3    
Maximum [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Global target asset allocation, fixed income securities maximum percentage (35.00%)    
Global target asset allocation, alternative assets maximum percentage (35.00%)    
Investment strategies time period, years 5    
Equity Securities [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Actual asset allocation, percentage 48.00% 48.00%  
Equity Securities [Member] | Minimum [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Expected rate of return on assets assumption reflected as a long-term asset allocation 25.00%    
Equity Securities [Member] | Maximum [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Expected rate of return on assets assumption reflected as a long-term asset allocation 75.00%    
Fixed Income Securities [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Actual asset allocation, percentage 23.00% 47.00%  
Fixed Income Securities [Member] | Minimum [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Expected rate of return on assets assumption reflected as a long-term asset allocation 15.00%    
Fixed Income Securities [Member] | Maximum [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Expected rate of return on assets assumption reflected as a long-term asset allocation 35.00%    
Alternative Assets [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Actual asset allocation, percentage 20.00% 3.00%  
Alternative Assets [Member] | Minimum [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Expected rate of return on assets assumption reflected as a long-term asset allocation 10.00%    
Alternative Assets [Member] | Maximum [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Expected rate of return on assets assumption reflected as a long-term asset allocation 35.00%    
Cash [Member] | Minimum [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Expected rate of return on assets assumption reflected as a long-term asset allocation 0.00%    
Cash [Member] | Maximum [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Expected rate of return on assets assumption reflected as a long-term asset allocation 10.00%    
Cash And Cash Equivalents [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Actual asset allocation, percentage 9.00% 2.00%  
Common Stock [Member] | Equity Securities [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Actual asset allocation, percentage 5.00% 4.00%  
Money Purchase Plan [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Percentage of annual contribution to each eligible participant's gross compensation 5.00%    
Defined benefit plans contribution by the company 2,300,000 2,200,000 2,400,000
Savings And Investment Plans [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plans contribution by the company 6,600,000 3,200,000 4,600,000
2% Non-Matching Contribution [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plans contribution by the company 2,400,000 2,200,000 2,000,000
Percentage of non-matching contribution to participants 2.00%    
U.S. [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit pension plan employees, percentage 31.00%    
U.S. [Member] | Pension Benefits [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Expected rate of return on assets assumption reflected as a long-term asset allocation 8.25% 8.25% 8.75%
Non-U.S. [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit pension plan employees, percentage 14.00%    
Non-U.S. [Member] | Pension Benefits [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Expected rate of return on assets assumption reflected as a long-term asset allocation 7.01% 7.13% 7.25%
Significant Unobservable Inputs Level 3 [Member] | Hedge Funds [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan Purchases, Sales, Settlements And Transfers Between Measurement Levels $ (15,671,000)