Employee Benefit Plans And Other Postretirement Benefits (Schedule Of Net Periodic Benefit Cost Recognized In Accumulated And Other Comprehensive Income) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Prior service cost (credit)	$ (12,996)
Net actuarial loss	545,998
Amounts included in other comprehensive income, net of tax	533,002
Pension And SERPA Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Prior service cost (credit)	5,352
Net actuarial loss	462,004
Amounts included in other comprehensive income, net of tax	467,356
Postretirement Healthcare Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Prior service cost (credit)	(18,348)
Net actuarial loss	83,994
Amounts included in other comprehensive income, net of tax	$ 65,646