Retirement Plans and Postretirement Medical Benefits (Fair Value Measurements of Plan Assets) (Details) (USD $) | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010 |
In Thousands, unless otherwise specified |
Defined Benefit Plan Disclosure [Line Items] | ' | ' | ' | ' |
Other Asset, Liability Related to Pension Plan Assets | $907,806 | $913,276 | $856,238 | $484,363 |
Foreign Pension Plans, Defined Benefit [Member] | ' | ' | ' | ' |
Defined Benefit Plan Disclosure [Line Items] | ' | ' | ' | ' |
Assets, Fair Value Disclosure | 554,725 | 500,438 | ' | ' |
Other Asset, Liability Related to Pension Plan Assets | 5,285 | 4,414 | ' | ' |
Defined Benefit Plan, Fair Value of Plan Assets | 1,068 | 4,479 | ' | ' |
Defined Benefit Plan, Fair Value of Plan Assets | 561,078 | 509,331 | ' | ' |
Foreign Pension Plans, Defined Benefit [Member] | Fair Value, Inputs, Level 1 [Member] | ' | ' | ' | ' |
Defined Benefit Plan Disclosure [Line Items] | ' | ' | ' | ' |
Assets, Fair Value Disclosure | 109,403 | 96,442 | ' | ' |
Foreign Pension Plans, Defined Benefit [Member] | Fair Value, Inputs, Level 2 [Member] | ' | ' | ' | ' |
Defined Benefit Plan Disclosure [Line Items] | ' | ' | ' | ' |
Assets, Fair Value Disclosure | 445,322 | 403,996 | ' | ' |
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 | 6,058 | 7,130 | ' | ' |
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 | 6,058 | 7,130 | ' | ' |
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 | 366,449 | 310,104 | ' | ' |
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 | 109,403 | 96,442 | ' | ' |
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 | 257,046 | 213,662 | ' | ' |
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 | 104,070 | 157,332 | ' | ' |
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 | 104,070 | 157,332 | ' | ' |
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 | 60,204 | 18,937 | ' | ' |
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 | 60,204 | 18,937 | ' | ' |
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 | 17,944 | 6,935 | ' | ' |
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 | 17,944 | 6,935 | ' | ' |
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 | ' | ' |
United States Pension Plans of US Entity, Defined Benefit [Member] | ' | ' | ' | ' |
Defined Benefit Plan Disclosure [Line Items] | ' | ' | ' | ' |
Assets, Fair Value Disclosure | 1,524,759 | 1,686,105 | ' | ' |
Cash and Cash Equivalents, at Carrying Value | -6,602 | -104,375 | ' | ' |
Other Asset, Liability Related to Pension Plan Assets | 634 | 618 | ' | ' |
Defined Benefit Plan, Fair Value of Plan Assets | 4,888 | 1,584 | ' | ' |
Defined Benefit Plan, Fair Value of Plan Assets | 1,523,679 | 1,583,932 | ' | ' |
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 | 323,378 | 304,287 | ' | ' |
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 | 1,043,360 | 1,223,654 | ' | ' |
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 | 158,021 | 158,164 | ' | ' |
United States Pension Plans of US Entity, Defined Benefit [Member] | Money Market Funds [Member] | ' | ' | ' | ' |
Defined Benefit Plan Disclosure [Line Items] | ' | ' | ' | ' |
Assets, Fair Value Disclosure | 30,374 | 17,363 | ' | ' |
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 | 30,374 | 17,363 | ' | ' |
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 | 445,291 | 454,069 | ' | ' |
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 | 279,988 | 250,303 | ' | ' |
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 | 165,303 | 203,766 | ' | ' |
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 | 209,674 | 200,899 | ' | ' |
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 | 209,674 | 200,899 | ' | ' |
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 | 73,867 | 89,445 | ' | ' |
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 | 43,390 | 53,984 | ' | ' |
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 | 30,477 | 35,461 | ' | ' |
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 | 568,567 | 621,691 | ' | ' |
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 | 568,567 | 621,691 | ' | ' |
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 | 34,372 | 42,743 | ' | ' |
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 | 31,738 | 39,552 | ' | ' |
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 | 2,634 | 3,191 | ' | ' |
United States Pension Plans of US Entity, Defined Benefit [Member] | Asset-backed Securities [Member] | ' | ' | ' | ' |
Defined Benefit Plan Disclosure [Line Items] | ' | ' | ' | ' |
Assets, Fair Value Disclosure | 625 | 547 | ' | ' |
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 | 625 | 547 | ' | ' |
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 | 87,470 | 91,805 | ' | ' |
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 | 87,470 | 91,805 | ' | ' |
United States Pension Plans of US Entity, Defined Benefit [Member] | Real Estate [Member] | ' | ' | ' | ' |
Defined Benefit Plan Disclosure [Line Items] | ' | ' | ' | ' |
Assets, Fair Value Disclosure | 67,917 | 63,168 | ' | ' |
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 | 67,917 | 63,168 | ' | ' |
United States Pension Plans of US Entity, Defined Benefit [Member] | Securities Lending Fund [Member] | ' | ' | ' | ' |
Defined Benefit Plan Disclosure [Line Items] | ' | ' | ' | ' |
Assets, Fair Value Disclosure | 6,602 | 104,375 | ' | ' |
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 | 6,602 | 104,375 | ' | ' |
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 | ' | ' |