XML 40 R51.htm IDEA: XBRL DOCUMENT v2.3.0.15
Retirement Plans (Details) (USD $)
9 Months Ended12 Months Ended3 Months Ended9 Months Ended3 Months Ended9 Months Ended
Sep. 30, 2011
Sep. 30, 2010
Dec. 31, 2010
Sep. 30, 2011
Pension Plans, Defined Benefit [Member]
Sep. 30, 2010
Pension Plans, Defined Benefit [Member]
Sep. 30, 2011
Pension Plans, Defined Benefit [Member]
Sep. 30, 2010
Pension Plans, Defined Benefit [Member]
Sep. 30, 2011
Other Postretirement Benefit Plans, Defined Benefit [Member]
Sep. 30, 2010
Other Postretirement Benefit Plans, Defined Benefit [Member]
Sep. 30, 2011
Other Postretirement Benefit Plans, Defined Benefit [Member]
Sep. 30, 2010
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]           
Service cost   $ 9,615,000$ 8,994,000$ 28,844,000$ 12,212,000$ 4,206,000$ 3,842,000$ 12,662,000$ 4,041,000
Interest cost on projected benefit obligation   21,172,00021,601,00063,516,00046,364,0005,986,0006,241,00018,642,00011,499,000
Expected return on plan assets   (25,589,000)(23,262,000)(76,766,000)(46,561,000)(79,000)(113,000)(242,000)(330,000)
Amortization of prior service cost /(credit)   (50,000)(49,000)(150,000)(149,000)(2,552,000)(1,932,000)(7,651,000)(5,790,000)
Amortization of unrecognized loss   4,435,0007,048,00013,306,00020,545,000607,000528,0003,604,0003,690,000
Net periodic pension benefit cost   9,583,00014,332,00028,750,00032,411,0008,168,0008,566,00027,015,00013,110,000
Other retirement plans disclosure [Abstract]           
Amount capitalized of pension and OPEB expense9,800,0005,400,000         
Range of full year estimated pension and other postretirement benefit expenses - lower70,000,00068,400,000         
Range of full year estimated pension and other postretirement benefit expenses - upper80,000,00068,400,000         
Estimated full year cash contributions to pension plan76,700,000          
Payments made to pension plans18,600,000          
Contribution of real property with a fair value58,100,000          
Pension contribution under ERISA50,000,000          
Number of administrative properties contributed to the plan4          
Term of property leases (in years)15Y          
Aggregate annual rent5,000,000          
Obligation recorded58,100,000          
Other liabilities57,500,000          
Other current liabilities600,000          
Number of pension plans that were merged with the pension plan12          
Assets transferred into the Plan related to the Transaction106,900,000 438,800,000        
Receivable of the Plan that was transferred related to the Transaction59,600,000          
Amount of pension plan assets1,228,100,000 1,290,300,000        
Amount of decrease in pension plan assets62,200,000          
Percentage of decrease in pension plan assets (in hundredths)5.00%          
Decrease in pension plan assets due to negative investment returns44,800,000          
Decrease in pension plan assets due to ongoing benefit payments94,100,000          
Increase in pension plan assets due to investment returns$ 76,700,000