XML 85 R58.htm IDEA: XBRL DOCUMENT v2.4.0.6
Employee Benefits (Details 2) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Employee Benefits      
Balances in deferred compensation plan $ 8.7 $ 8.7  
Value of assets for funding future payouts under the deferred compensation plan 8.4    
Change in plan assets      
Fair value of plan assets at end of year 53.1 53.7  
SERP's
      
Change in benefit obligation      
Benefit obligation at beginning of year 29.4 30.5  
Service cost 0.7 0.8 0.8
Interest cost 1.5 1.8  
Actuarial loss (gain) 5.8 (2.8)  
Benefits paid (1.2) (0.9)  
Benefit obligation at end of year 36.2 29.4 30.5
Funded status      
Unfunded status of the plans (36.2) (29.4)  
Items not yet recognized as component of net periodic pension expense      
Unrecognized net actuarial losses 10.7 5.2  
Unamortized prior service (credit) cost (1.6) (2.1)  
Accumulated other comprehensive (income) loss 9.1 3.1  
Amounts recognized in the statement of financial position      
Current liabilities (1.3) (1.3)  
Noncurrent liabilities (34.9) (28.1)  
Accumulated other comprehensive (income) loss 9.1 3.1  
Net amount recognized (27.1) (26.3)  
Accumulated benefit obligation 34.5 28.5  
Components of net periodic benefit cost      
Service cost 0.7 0.8 0.8
Interest cost 1.5 1.8 1.7
Amortization of prior service credit (0.4) (0.4) (0.4)
Amortization of net loss 0.2 0.9 1.0
Net periodic benefit cost 2.0 3.1 3.1
Weighted average assumptions to determine net cost      
Discount rate (as a percent) 5.40% 5.99% 6.01%
Rate of compensation increase (as a percent) 6.00% 6.00% 6.00%
Weighted average assumptions to determine benefit obligations      
Discount rate (as a percent) 4.18% 5.39%  
Rate of compensation increase (as a percent) 6.00% 6.00%  
Expected employer contributions during 2012 1.3    
Defined Benefit Plans
      
Change in benefit obligation      
Benefit obligation at beginning of year 64.4 52.1  
Assumed in acquisition   9.1  
Service cost 1.0 0.7 0.8
Interest cost 3.4 3.2  
Actuarial loss (gain) 9.8 2.4  
Change in assumptions 1.6 (0.3)  
Benefits paid (2.9) (2.9)  
Plan amendments 0.8 0.1  
Benefit obligation at end of year 78.1 64.4 52.1
Change in plan assets      
Fair value of plan assets at beginning of year 53.7 41.6  
Acquired in acquisition   5.7  
Actual return on plan assets (1.7) 5.9  
Employer contributions 4.1 3.5  
Benefits paid (3.0) (3.0)  
Fair value of plan assets at end of year 53.1 53.7 41.6
Funded status      
Unfunded status of the plans (25.0) (10.7)  
Items not yet recognized as component of net periodic pension expense      
Unrecognized net actuarial losses 24.7 9.9  
Unamortized prior service (credit) cost 1.2 0.4  
Accumulated other comprehensive (income) loss 25.9 10.3  
Amounts recognized in the statement of financial position      
Noncurrent liabilities (25.0) (10.7)  
Accumulated other comprehensive (income) loss 25.9 10.3  
Net amount recognized 0.9 (0.4)  
Accumulated benefit obligation 78.1 64.4  
Information for defined benefit plans with an accumulated benefit obligation and projected benefit obligation in excess of plan assets      
Accumulated benefit obligation 78.1 62.2  
Projected benefit obligation 78.1 62.2  
Fair value of plan assets 53.1 51.3  
Components of net periodic benefit cost      
Service cost 1.0 0.7 0.8
Interest cost 3.4 3.2 2.9
Expected return on plan assets (4.3) (3.5) (2.7)
Curtailment/settlement expense 0.1 0.1 0.1
Amortization of prior service credit 0.1 0.1 0.1
Amortization of net loss 0.4 0.4 0.8
Net periodic benefit cost 0.7 1.0 2.0
Weighted average assumptions to determine net cost      
Discount rate (as a percent) 5.29% 5.92% 6.06%
Expected long-term rate of return on plan assets (as a percent) 7.95% 8.10% 8.04%
Weighted average assumptions to determine benefit obligations      
Discount rate (as a percent) 4.31% 5.43%  
Expected long-term rate of return on plan assets (as a percent) 7.95% 8.10% 8.04%
Expected employer contributions during 2012 2.9    
Postretirement Medical Plans
      
Change in benefit obligation      
Benefit obligation at beginning of year 17.5 14.4  
Assumed in acquisition 1.8    
Service cost 0.9 0.9 0.8
Interest cost 0.9 1.0  
Actuarial loss (gain) 1.3 1.5  
Benefits paid (0.4) (0.3)  
Plan amendments (10.1)    
Benefit obligation at end of year 11.9 17.5 14.4
Funded status      
Unfunded status of the plans (11.9) (17.5)  
Items not yet recognized as component of net periodic pension expense      
Unrecognized net actuarial losses 5.1 4.3  
Unamortized prior service (credit) cost (9.7)    
Accumulated other comprehensive (income) loss (4.6) 4.3  
Amounts recognized in the statement of financial position      
Current liabilities (1.0) (0.8)  
Noncurrent liabilities (10.9) (16.7)  
Accumulated other comprehensive (income) loss (4.6) 4.3  
Net amount recognized (16.5) (13.2)  
Components of net periodic benefit cost      
Service cost 0.9 0.9 0.8
Interest cost 0.9 1.0 0.8
Amortization of prior service credit (0.4)    
Amortization of net loss 0.4 0.2 0.1
Net periodic benefit cost $ 1.8 $ 2.1 $ 1.7
Weighted average assumptions to determine net cost      
Discount rate (as a percent) 5.17% 6.00% 6.00%
Health care cost trend rate (as a percent) 10.00% 10.00% 10.00%
Rate to which the cost trend rate is assumed to decline (as a percent) 4.50% 6.00% 6.00%
Year that the rate reaches the ultimate trend rate 2030 2014 2013
Weighted average assumptions to determine benefit obligations      
Discount rate (as a percent) 3.50% 5.25%  
Health care cost trend rate assumption for next year (as a percent) 9.50% 10.00%  
Rate to which the cost trend rate is assumed to decline (as a percent) 4.50% 4.50%  
Year that the rate reaches the ultimate trend rate 2031 2030