Retirement Plans and Postretirement Medical Benefits (Fair Value Measurements of Plan Assets) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Defined Benefit Plan Disclosure [Line Items]
Other Asset, Liability Related to Pension Plan Assets	$ 913,276	$ 856,238	$ 484,363	$ 412,737
Foreign Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	500,324	420,039
Other Asset, Liability Related to Pension Plan Assets	4,414	16,424
Defined Benefit Plan, Fair Value of Plan Assets	4,593	2,385
Defined Benefit Plan, Fair Value of Plan Assets	509,331	438,848
Foreign Pension Plans, Defined Benefit [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	96,442	113,257
Foreign Pension Plans, Defined Benefit [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	403,882	306,782
Foreign Pension Plans, Defined Benefit [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	0	0
Foreign Pension Plans, Defined Benefit [Member] | Money Market Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	7,130	7,236
Foreign Pension Plans, Defined Benefit [Member] | Money Market Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	0	0
Foreign Pension Plans, Defined Benefit [Member] | Money Market Funds [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	7,130	7,236
Foreign Pension Plans, Defined Benefit [Member] | Money Market Funds [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	0	0
Foreign Pension Plans, Defined Benefit [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	310,104	264,044
Foreign Pension Plans, Defined Benefit [Member] | Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	96,442	113,257
Foreign Pension Plans, Defined Benefit [Member] | Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	213,662	150,787
Foreign Pension Plans, Defined Benefit [Member] | Equity Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	0	0
Foreign Pension Plans, Defined Benefit [Member] | Fixed Income Investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	157,332	127,611
Foreign Pension Plans, Defined Benefit [Member] | Fixed Income Investments [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	0	0
Foreign Pension Plans, Defined Benefit [Member] | Fixed Income Investments [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	157,332	127,611
Foreign Pension Plans, Defined Benefit [Member] | Fixed Income Investments [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	0	0
Foreign Pension Plans, Defined Benefit [Member] | Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	18,937	13,616
Foreign Pension Plans, Defined Benefit [Member] | Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	0	0
Foreign Pension Plans, Defined Benefit [Member] | Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	18,937	13,616
Foreign Pension Plans, Defined Benefit [Member] | Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	0	0
Foreign Pension Plans, Defined Benefit [Member] | Corporate Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	6,935	7,150
Foreign Pension Plans, Defined Benefit [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	0	0
Foreign Pension Plans, Defined Benefit [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	6,935	7,150
Foreign Pension Plans, Defined Benefit [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	0	0
Foreign Pension Plans, Defined Benefit [Member] | Derivative [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	(114)	382
Foreign Pension Plans, Defined Benefit [Member] | Derivative [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	0	0
Foreign Pension Plans, Defined Benefit [Member] | Derivative [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	(114)	382
Foreign Pension Plans, Defined Benefit [Member] | Derivative [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	0	0
United States Pension Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	1,686,843	1,553,164
Cash and Cash Equivalents, at Carrying Value	(104,375)	(119,528)
Other Asset, Liability Related to Pension Plan Assets	618	1,108
Defined Benefit Plan, Fair Value of Plan Assets	846	(8,208)
Defined Benefit Plan, Fair Value of Plan Assets	1,583,932	1,426,536
United States Pension Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	305,025	278,714
United States Pension Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	1,223,654	1,123,960
United States Pension Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	158,164	150,490
United States Pension Plans of US Entity, Defined Benefit [Member] | Money Market Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	17,363	22,064
United States Pension Plans of US Entity, Defined Benefit [Member] | Money Market Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	0	0
United States Pension Plans of US Entity, Defined Benefit [Member] | Money Market Funds [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	17,363	22,064
United States Pension Plans of US Entity, Defined Benefit [Member] | Money Market Funds [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	0	0
United States Pension Plans of US Entity, Defined Benefit [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	454,069	480,162
United States Pension Plans of US Entity, Defined Benefit [Member] | Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	250,303	218,010
United States Pension Plans of US Entity, Defined Benefit [Member] | Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	203,766	262,152
United States Pension Plans of US Entity, Defined Benefit [Member] | Equity Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	0	0
United States Pension Plans of US Entity, Defined Benefit [Member] | Fixed Income Investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	200,899	177,349
United States Pension Plans of US Entity, Defined Benefit [Member] | Fixed Income Investments [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	0	0
United States Pension Plans of US Entity, Defined Benefit [Member] | Fixed Income Investments [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	200,899	177,349
United States Pension Plans of US Entity, Defined Benefit [Member] | Fixed Income Investments [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	0	0
United States Pension Plans of US Entity, Defined Benefit [Member] | Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	89,445	77,156
United States Pension Plans of US Entity, Defined Benefit [Member] | Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	53,984	60,411
United States Pension Plans of US Entity, Defined Benefit [Member] | Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	35,461	16,745
United States Pension Plans of US Entity, Defined Benefit [Member] | Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	0	0
United States Pension Plans of US Entity, Defined Benefit [Member] | Corporate Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	621,691	467,281
United States Pension Plans of US Entity, Defined Benefit [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	0	0
United States Pension Plans of US Entity, Defined Benefit [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	621,691	467,281
United States Pension Plans of US Entity, Defined Benefit [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	0	0
United States Pension Plans of US Entity, Defined Benefit [Member] | Mortgage Backed Securities, Other [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	42,743	61,624
United States Pension Plans of US Entity, Defined Benefit [Member] | Mortgage Backed Securities, Other [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	0	0
United States Pension Plans of US Entity, Defined Benefit [Member] | Mortgage Backed Securities, Other [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	39,552	57,922
United States Pension Plans of US Entity, Defined Benefit [Member] | Mortgage Backed Securities, Other [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	3,191	3,702
United States Pension Plans of US Entity, Defined Benefit [Member] | Asset-backed Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	547	919
United States Pension Plans of US Entity, Defined Benefit [Member] | Asset-backed Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	0	0
United States Pension Plans of US Entity, Defined Benefit [Member] | Asset-backed Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	547	919
United States Pension Plans of US Entity, Defined Benefit [Member] | Asset-backed Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	0	0
United States Pension Plans of US Entity, Defined Benefit [Member] | Private Equity Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	91,805	88,870
United States Pension Plans of US Entity, Defined Benefit [Member] | Private Equity Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	0	0
United States Pension Plans of US Entity, Defined Benefit [Member] | Private Equity Funds [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	0	0
United States Pension Plans of US Entity, Defined Benefit [Member] | Private Equity Funds [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	91,805	88,870
United States Pension Plans of US Entity, Defined Benefit [Member] | Real Estate [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	63,168	57,918
United States Pension Plans of US Entity, Defined Benefit [Member] | Real Estate [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	0	0
United States Pension Plans of US Entity, Defined Benefit [Member] | Real Estate [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	0	0
United States Pension Plans of US Entity, Defined Benefit [Member] | Real Estate [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	63,168	57,918
United States Pension Plans of US Entity, Defined Benefit [Member] | Derivative [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	738	293
United States Pension Plans of US Entity, Defined Benefit [Member] | Derivative [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	738	293
United States Pension Plans of US Entity, Defined Benefit [Member] | Derivative [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	0	0
United States Pension Plans of US Entity, Defined Benefit [Member] | Derivative [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	0	0
United States Pension Plans of US Entity, Defined Benefit [Member] | Securities Lending Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	104,375	119,528
United States Pension Plans of US Entity, Defined Benefit [Member] | Securities Lending Fund [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	0	0
United States Pension Plans of US Entity, Defined Benefit [Member] | Securities Lending Fund [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	104,375	119,528
United States Pension Plans of US Entity, Defined Benefit [Member] | Securities Lending Fund [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, Fair Value Disclosure	$ 0	$ 0