Pension Plans And Other Postretirement Benefits (Schedule Of Reconciliation Of Benefit Obligations, Plan Assets And Funded Status Of The Plans) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011		Dec. 31, 2010		Dec. 31, 2009
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, Ending Balance	$ 531,105	[1]	$ 507,064	[1]
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Benefit obligation at January 1	613,880		570,871
Service cost	12,830		11,271		10,568
Interest cost	32,933		31,844		32,967
Plan amendments	508		288
Actuarial loss	49,729		40,289
Benefits paid	(35,249)		(37,528)
Employee contributions	299		258
Foreign exchange loss (gain)	(265)		(3,413)
Benefit obligation at December 31	674,665		613,880		570,871
Fair value of plan assets, Beginning Balance	507,064		417,125
Actual return on plan assets	3,107		50,988
Employer contributions	56,105		76,841
Foreign exchange gain (loss)	(221)		(620)
Fair value of plan assets, Ending Balance	531,105		507,064		417,125
Funded status	(143,560)		(106,816)
Current liabilities (accrued expenses)	(15,596)		(3,980)
Noncurrent liabilities (pension benefits)	(127,964)		(102,836)
Net pension liability	(143,560)		(106,816)
Prior service benefit	(7,200)		(8,661)
Net actuarial loss	420,909		351,778
Net amount recognized	413,709		343,117
Discount rate	5.04%		5.40%
Rate of compensation increase	3.96%		3.93%
Domestic Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Benefit obligation at January 1	572,963		526,478
Service cost	11,169		9,577		8,544
Interest cost	30,945		29,934		30,608
Plan amendments	508		288
Actuarial loss	48,977		40,124
Benefits paid	(30,378)		(33,438)
Benefit obligation at December 31	634,184		572,963		526,478
Fair value of plan assets, Beginning Balance	498,967		410,037
Actual return on plan assets	2,662		50,471
Employer contributions	51,157		71,897
Fair value of plan assets, Ending Balance	522,408		498,967		410,037
Funded status	(111,776)		(73,996)
Current liabilities (accrued expenses)	(13,927)		(1,332)
Noncurrent liabilities (pension benefits)	(97,849)		(72,664)
Net pension liability	(111,776)		(73,996)
Prior service benefit	(7,623)		(9,141)
Net actuarial loss	416,314		346,699
Net amount recognized	408,691		337,558
Discount rate	5.07%		5.45%
Rate of compensation increase	4.11%		4.11%
Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Benefit obligation at January 1	66,436		65,739
Service cost	263		382		438
Interest cost	3,393		3,564		3,769
Actuarial loss	3,555		552
Benefits paid	(4,712)		(3,801)
Benefit obligation at December 31	68,935		66,436		65,739
Fair value of plan assets, Beginning Balance	7,985	[1]	8,207
Actual return on plan assets	740		315
Employer contributions	3,668		3,264
Fair value of plan assets, Ending Balance	7,681	[1]	7,985	[1]	8,207
Funded status	(61,254)		(58,451)
Current liabilities (accrued expenses)	(3,666)		(3,437)
Noncurrent liabilities (pension benefits)	(57,588)		(55,014)
Net pension liability	(61,254)		(58,451)
Prior service benefit	(620)		(1,317)
Net actuarial loss	19,801		18,885
Net amount recognized	$ 19,181		$ 17,568
Discount rate	5.10%		5.30%
Rate of compensation increase	4.00%		4.00%

[1] See Note 17 "Pension Plans and Other Postretirement Benefits" for further discussion on fair value measurements of our pension and postretirement assets.