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Pension and Other Postretirement Benefits - Asset Categories Based on the Nature and Risks of the Plan Assets (Detail)
In Thousands, unless otherwise specified
Dec. 31, 2014
USD ($)
Dec. 31, 2014
Transportation [Member]
USD ($)
Dec. 31, 2014
Wholesale Distribution [Member]
USD ($)
Dec. 31, 2014
Foreign Pension Benefits [Member]
USD ($)
Dec. 31, 2014
Foreign Pension Benefits [Member]
GBP (£)
Dec. 31, 2013
Foreign Pension Benefits [Member]
USD ($)
Dec. 31, 2013
Foreign Pension Benefits [Member]
GBP (£)
Dec. 31, 2012
Foreign Pension Benefits [Member]
USD ($)
Dec. 31, 2014
Foreign Pension Benefits [Member]
Equity Securities [Member]
USD ($)
Dec. 31, 2013
Foreign Pension Benefits [Member]
Equity Securities [Member]
USD ($)
Dec. 31, 2014
Foreign Pension Benefits [Member]
Equity Securities [Member]
International [Member]
Commingled Funds [Member]
USD ($)
Dec. 31, 2013
Foreign Pension Benefits [Member]
Equity Securities [Member]
International [Member]
Commingled Funds [Member]
USD ($)
Dec. 31, 2014
Foreign Pension Benefits [Member]
Equity Securities [Member]
U.K. [Member]
Commingled Funds [Member]
USD ($)
Dec. 31, 2013
Foreign Pension Benefits [Member]
Equity Securities [Member]
U.K. [Member]
Commingled Funds [Member]
USD ($)
Dec. 31, 2014
Foreign Pension Benefits [Member]
Fixed - Income Securities [Member]
U.K. [Member]
Commingled Funds [Member]
USD ($)
Dec. 31, 2013
Foreign Pension Benefits [Member]
Fixed - Income Securities [Member]
U.K. [Member]
Commingled Funds [Member]
USD ($)
Dec. 31, 2014
Foreign Pension Benefits [Member]
Alternative Investments [Member]
Hedge and Absolute Return Funds [Member]
USD ($)
Dec. 31, 2013
Foreign Pension Benefits [Member]
Alternative Investments [Member]
Hedge and Absolute Return Funds [Member]
USD ($)
Dec. 31, 2014
Foreign Pension Benefits [Member]
Other (Primarily Cash and Cash Equivalents) [Member]
USD ($)
Dec. 31, 2013
Foreign Pension Benefits [Member]
Other (Primarily Cash and Cash Equivalents) [Member]
USD ($)
Dec. 31, 2014
U.S. Pension Benefits [Member]
USD ($)
Dec. 31, 2013
U.S. Pension Benefits [Member]
USD ($)
Dec. 31, 2012
U.S. Pension Benefits [Member]
USD ($)
Dec. 31, 2014
U.S. Pension Benefits [Member]
Equity Securities [Member]
USD ($)
Dec. 31, 2013
U.S. Pension Benefits [Member]
Equity Securities [Member]
USD ($)
Dec. 31, 2014
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Capital Goods [Member]
USD ($)
Dec. 31, 2013
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Capital Goods [Member]
USD ($)
Dec. 31, 2014
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Chemicals [Member]
USD ($)
Dec. 31, 2013
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Chemicals [Member]
USD ($)
Dec. 31, 2014
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Commercial Property [Member]
USD ($)
Dec. 31, 2013
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Commercial Property [Member]
USD ($)
Dec. 31, 2014
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Commercial Services [Member]
USD ($)
Dec. 31, 2013
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Commercial Services [Member]
USD ($)
Dec. 31, 2014
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Common Collective Trust Funds [Member]
USD ($)
Dec. 31, 2013
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Common Collective Trust Funds [Member]
USD ($)
Dec. 31, 2014
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Electronics [Member]
USD ($)
Dec. 31, 2013
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Electronics [Member]
USD ($)
Dec. 31, 2014
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Engineering & Construction [Member]
USD ($)
Dec. 31, 2013
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Engineering & Construction [Member]
USD ($)
Dec. 31, 2014
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Food Processing [Member]
USD ($)
Dec. 31, 2013
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Food Processing [Member]
USD ($)
Dec. 31, 2014
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Health Care [Member]
USD ($)
Dec. 31, 2013
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Health Care [Member]
USD ($)
Dec. 31, 2014
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Limited Partnerships - Public Equity [Member]
USD ($)
Dec. 31, 2013
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Limited Partnerships - Public Equity [Member]
USD ($)
Dec. 31, 2014
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Manufacturing [Member]
USD ($)
Dec. 31, 2013
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Manufacturing [Member]
USD ($)
Dec. 31, 2014
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Oil & Gas [Member]
USD ($)
Dec. 31, 2013
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Oil & Gas [Member]
USD ($)
Dec. 31, 2014
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Retail [Member]
USD ($)
Dec. 31, 2013
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Retail [Member]
USD ($)
Dec. 31, 2014
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Technology [Member]
USD ($)
Dec. 31, 2013
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Technology [Member]
USD ($)
Dec. 31, 2014
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
U.S., Other [Member]
USD ($)
Dec. 31, 2013
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
U.S., Other [Member]
USD ($)
Dec. 31, 2014
U.S. Pension Benefits [Member]
Equity Securities [Member]
International [Member]
Common Collective Trust Funds [Member]
USD ($)
Dec. 31, 2013
U.S. Pension Benefits [Member]
Equity Securities [Member]
International [Member]
Common Collective Trust Funds [Member]
USD ($)
Dec. 31, 2014
U.S. Pension Benefits [Member]
Equity Securities [Member]
International [Member]
Engineering & Construction [Member]
USD ($)
Dec. 31, 2013
U.S. Pension Benefits [Member]
Equity Securities [Member]
International [Member]
Engineering & Construction [Member]
USD ($)
Dec. 31, 2014
U.S. Pension Benefits [Member]
Equity Securities [Member]
International [Member]
Oil & Gas [Member]
USD ($)
Dec. 31, 2013
U.S. Pension Benefits [Member]
Equity Securities [Member]
International [Member]
Oil & Gas [Member]
USD ($)
Dec. 31, 2014
U.S. Pension Benefits [Member]
Equity Securities [Member]
International [Member]
Technology [Member]
USD ($)
Dec. 31, 2013
U.S. Pension Benefits [Member]
Equity Securities [Member]
International [Member]
Technology [Member]
USD ($)
Dec. 31, 2014
U.S. Pension Benefits [Member]
Equity Securities [Member]
International [Member]
Bank & Financial Services [Member]
USD ($)
Dec. 31, 2013
U.S. Pension Benefits [Member]
Equity Securities [Member]
International [Member]
Bank & Financial Services [Member]
USD ($)
Dec. 31, 2014
U.S. Pension Benefits [Member]
Equity Securities [Member]
International [Member]
Real Estate [Member]
USD ($)
Dec. 31, 2013
U.S. Pension Benefits [Member]
Equity Securities [Member]
International [Member]
Real Estate [Member]
USD ($)
Dec. 31, 2014
U.S. Pension Benefits [Member]
Equity Securities [Member]
International [Member]
International, Other [Member]
USD ($)
Dec. 31, 2013
U.S. Pension Benefits [Member]
Equity Securities [Member]
International [Member]
International, Other [Member]
USD ($)
Dec. 31, 2014
U.S. Pension Benefits [Member]
Fixed - Income Securities [Member]
USD ($)
Dec. 31, 2013
U.S. Pension Benefits [Member]
Fixed - Income Securities [Member]
USD ($)
Dec. 31, 2014
U.S. Pension Benefits [Member]
Fixed - Income Securities [Member]
Commingled Funds [Member]
USD ($)
Dec. 31, 2013
U.S. Pension Benefits [Member]
Fixed - Income Securities [Member]
Commingled Funds [Member]
USD ($)
Dec. 31, 2014
U.S. Pension Benefits [Member]
Fixed - Income Securities [Member]
Preferred (Fixed Income Securities) [Member]
USD ($)
Dec. 31, 2013
U.S. Pension Benefits [Member]
Fixed - Income Securities [Member]
Preferred (Fixed Income Securities) [Member]
USD ($)
Dec. 31, 2014
U.S. Pension Benefits [Member]
Fixed - Income Securities [Member]
Other (Fixed Income Securities) [Member]
USD ($)
Dec. 31, 2013
U.S. Pension Benefits [Member]
Fixed - Income Securities [Member]
Other (Fixed Income Securities) [Member]
USD ($)
Dec. 31, 2014
U.S. Pension Benefits [Member]
Alternative Investments [Member]
USD ($)
Dec. 31, 2013
U.S. Pension Benefits [Member]
Alternative Investments [Member]
USD ($)
Dec. 31, 2014
U.S. Pension Benefits [Member]
Alternative Investments [Member]
Hedge and Absolute Return Funds [Member]
USD ($)
Dec. 31, 2013
U.S. Pension Benefits [Member]
Alternative Investments [Member]
Hedge and Absolute Return Funds [Member]
USD ($)
Dec. 31, 2014
U.S. Pension Benefits [Member]
Alternative Investments [Member]
Managed Funds [Member]
USD ($)
Dec. 31, 2013
U.S. Pension Benefits [Member]
Alternative Investments [Member]
Managed Funds [Member]
USD ($)
Dec. 31, 2014
U.S. Pension Benefits [Member]
Other (Primarily Cash and Cash Equivalents) [Member]
USD ($)
Dec. 31, 2013
U.S. Pension Benefits [Member]
Other (Primarily Cash and Cash Equivalents) [Member]
USD ($)
Dec. 31, 2014
U.S. Pension Benefits [Member]
Other (Primarily Cash and Cash Equivalents) [Member]
Commingled Funds [Member]
USD ($)
Dec. 31, 2013
U.S. Pension Benefits [Member]
Other (Primarily Cash and Cash Equivalents) [Member]
Commingled Funds [Member]
USD ($)
Dec. 31, 2014
U.S. Pension Benefits [Member]
Other (Primarily Cash and Cash Equivalents) [Member]
Mutual Funds [Member]
USD ($)
Dec. 31, 2013
U.S. Pension Benefits [Member]
Other (Primarily Cash and Cash Equivalents) [Member]
Mutual Funds [Member]
USD ($)
Dec. 31, 2014
U.S. Pension Benefits [Member]
Other (Primarily Cash and Cash Equivalents) [Member]
Other [Member]
USD ($)
Dec. 31, 2013
U.S. Pension Benefits [Member]
Other (Primarily Cash and Cash Equivalents) [Member]
Other [Member]
USD ($)
Dec. 31, 2014
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
USD ($)
Dec. 31, 2014
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
Transportation [Member]
USD ($)
Dec. 31, 2014
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
Wholesale Distribution [Member]
USD ($)
Dec. 31, 2014
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
Foreign Pension Benefits [Member]
USD ($)
Dec. 31, 2013
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
Foreign Pension Benefits [Member]
USD ($)
Dec. 31, 2014
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
Foreign Pension Benefits [Member]
Equity Securities [Member]
USD ($)
Dec. 31, 2013
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
Foreign Pension Benefits [Member]
Equity Securities [Member]
USD ($)
Dec. 31, 2014
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
Foreign Pension Benefits [Member]
Equity Securities [Member]
International [Member]
Commingled Funds [Member]
USD ($)
Dec. 31, 2013
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
Foreign Pension Benefits [Member]
Equity Securities [Member]
International [Member]
Commingled Funds [Member]
USD ($)
Dec. 31, 2014
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
Foreign Pension Benefits [Member]
Equity Securities [Member]
U.K. [Member]
Commingled Funds [Member]
USD ($)
Dec. 31, 2013
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
Foreign Pension Benefits [Member]
Equity Securities [Member]
U.K. [Member]
Commingled Funds [Member]
USD ($)
Dec. 31, 2014
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
Foreign Pension Benefits [Member]
Fixed - Income Securities [Member]
U.K. [Member]
Commingled Funds [Member]
USD ($)
Dec. 31, 2013
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
Foreign Pension Benefits [Member]
Fixed - Income Securities [Member]
U.K. [Member]
Commingled Funds [Member]
USD ($)
Dec. 31, 2014
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
Foreign Pension Benefits [Member]
Alternative Investments [Member]
Hedge and Absolute Return Funds [Member]
USD ($)
Dec. 31, 2013
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
Foreign Pension Benefits [Member]
Alternative Investments [Member]
Hedge and Absolute Return Funds [Member]
USD ($)
Dec. 31, 2014
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
Foreign Pension Benefits [Member]
Other (Primarily Cash and Cash Equivalents) [Member]
USD ($)
Dec. 31, 2013
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
Foreign Pension Benefits [Member]
Other (Primarily Cash and Cash Equivalents) [Member]
USD ($)
Dec. 31, 2013
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
U.S. Pension Benefits [Member]
USD ($)
Dec. 31, 2014
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
USD ($)
Dec. 31, 2013
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
USD ($)
Dec. 31, 2014
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Capital Goods [Member]
USD ($)
Dec. 31, 2013
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Capital Goods [Member]
USD ($)
Dec. 31, 2014
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Chemicals [Member]
USD ($)
Dec. 31, 2013
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Chemicals [Member]
USD ($)
Dec. 31, 2014
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Commercial Property [Member]
USD ($)
Dec. 31, 2013
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Commercial Property [Member]
USD ($)
Dec. 31, 2014
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Commercial Services [Member]
USD ($)
Dec. 31, 2013
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Commercial Services [Member]
USD ($)
Dec. 31, 2014
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Common Collective Trust Funds [Member]
USD ($)
Dec. 31, 2013
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Common Collective Trust Funds [Member]
USD ($)
Dec. 31, 2014
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Electronics [Member]
USD ($)
Dec. 31, 2013
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Electronics [Member]
USD ($)
Dec. 31, 2014
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Engineering & Construction [Member]
USD ($)
Dec. 31, 2013
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Engineering & Construction [Member]
USD ($)
Dec. 31, 2014
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Food Processing [Member]
USD ($)
Dec. 31, 2013
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Food Processing [Member]
USD ($)
Dec. 31, 2014
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Health Care [Member]
USD ($)
Dec. 31, 2013
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Health Care [Member]
USD ($)
Dec. 31, 2014
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Limited Partnerships - Public Equity [Member]
USD ($)
Dec. 31, 2013
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Limited Partnerships - Public Equity [Member]
USD ($)
Dec. 31, 2014
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Manufacturing [Member]
USD ($)
Dec. 31, 2013
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Manufacturing [Member]
USD ($)
Dec. 31, 2014
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Oil & Gas [Member]
USD ($)
Dec. 31, 2013
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Oil & Gas [Member]
USD ($)
Dec. 31, 2014
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Retail [Member]
USD ($)
Dec. 31, 2013
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Retail [Member]
USD ($)
Dec. 31, 2014
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Technology [Member]
USD ($)
Dec. 31, 2013
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Technology [Member]
USD ($)
Dec. 31, 2014
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
U.S., Other [Member]
USD ($)
Dec. 31, 2013
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
U.S., Other [Member]
USD ($)
Dec. 31, 2014
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
International [Member]
Common Collective Trust Funds [Member]
USD ($)
Dec. 31, 2013
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
International [Member]
Common Collective Trust Funds [Member]
USD ($)
Dec. 31, 2014
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
International [Member]
Engineering & Construction [Member]
USD ($)
Dec. 31, 2013
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
International [Member]
Engineering & Construction [Member]
USD ($)
Dec. 31, 2014
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
International [Member]
Oil & Gas [Member]
USD ($)
Dec. 31, 2013
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
International [Member]
Oil & Gas [Member]
USD ($)
Dec. 31, 2014
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
International [Member]
Technology [Member]
USD ($)
Dec. 31, 2013
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
International [Member]
Technology [Member]
USD ($)
Dec. 31, 2014
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
International [Member]
Bank & Financial Services [Member]
USD ($)
Dec. 31, 2013
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
International [Member]
Bank & Financial Services [Member]
USD ($)
Dec. 31, 2014
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
International [Member]
Real Estate [Member]
USD ($)
Dec. 31, 2013
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
International [Member]
Real Estate [Member]
USD ($)
Dec. 31, 2014
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
International [Member]
International, Other [Member]
USD ($)
Dec. 31, 2013
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
International [Member]
International, Other [Member]
USD ($)
Dec. 31, 2014
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
U.S. Pension Benefits [Member]
Fixed - Income Securities [Member]
USD ($)
Dec. 31, 2013
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
U.S. Pension Benefits [Member]
Fixed - Income Securities [Member]
USD ($)
Dec. 31, 2014
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
U.S. Pension Benefits [Member]
Fixed - Income Securities [Member]
Commingled Funds [Member]
USD ($)
Dec. 31, 2013
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
U.S. Pension Benefits [Member]
Fixed - Income Securities [Member]
Commingled Funds [Member]
USD ($)
Dec. 31, 2014
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
U.S. Pension Benefits [Member]
Fixed - Income Securities [Member]
Preferred (Fixed Income Securities) [Member]
USD ($)
Dec. 31, 2013
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
U.S. Pension Benefits [Member]
Fixed - Income Securities [Member]
Preferred (Fixed Income Securities) [Member]
USD ($)
Dec. 31, 2014
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
U.S. Pension Benefits [Member]
Fixed - Income Securities [Member]
Other (Fixed Income Securities) [Member]
USD ($)
Dec. 31, 2013
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
U.S. Pension Benefits [Member]
Fixed - Income Securities [Member]
Other (Fixed Income Securities) [Member]
USD ($)
Dec. 31, 2014
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
U.S. Pension Benefits [Member]
Alternative Investments [Member]
USD ($)
Dec. 31, 2013
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
U.S. Pension Benefits [Member]
Alternative Investments [Member]
USD ($)
Dec. 31, 2014
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
U.S. Pension Benefits [Member]
Alternative Investments [Member]
Hedge and Absolute Return Funds [Member]
USD ($)
Dec. 31, 2013
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
U.S. Pension Benefits [Member]
Alternative Investments [Member]
Hedge and Absolute Return Funds [Member]
USD ($)
Dec. 31, 2014
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
U.S. Pension Benefits [Member]
Alternative Investments [Member]
Managed Funds [Member]
USD ($)
Dec. 31, 2013
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
U.S. Pension Benefits [Member]
Alternative Investments [Member]
Managed Funds [Member]
USD ($)
Dec. 31, 2014
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
U.S. Pension Benefits [Member]
Other (Primarily Cash and Cash Equivalents) [Member]
USD ($)
Dec. 31, 2013
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
U.S. Pension Benefits [Member]
Other (Primarily Cash and Cash Equivalents) [Member]
USD ($)
Dec. 31, 2014
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
U.S. Pension Benefits [Member]
Other (Primarily Cash and Cash Equivalents) [Member]
Commingled Funds [Member]
USD ($)
Dec. 31, 2013
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
U.S. Pension Benefits [Member]
Other (Primarily Cash and Cash Equivalents) [Member]
Commingled Funds [Member]
USD ($)
Dec. 31, 2014
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
U.S. Pension Benefits [Member]
Other (Primarily Cash and Cash Equivalents) [Member]
Mutual Funds [Member]
USD ($)
Dec. 31, 2013
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
U.S. Pension Benefits [Member]
Other (Primarily Cash and Cash Equivalents) [Member]
Mutual Funds [Member]
USD ($)
Dec. 31, 2014
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
U.S. Pension Benefits [Member]
Other (Primarily Cash and Cash Equivalents) [Member]
Other [Member]
USD ($)
Dec. 31, 2013
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]
U.S. Pension Benefits [Member]
Other (Primarily Cash and Cash Equivalents) [Member]
Other [Member]
USD ($)
Dec. 31, 2014
Significant Other Observable Inputs (Level 2) [Member]
USD ($)
Dec. 31, 2014
Significant Other Observable Inputs (Level 2) [Member]
Transportation [Member]
USD ($)
Dec. 31, 2014
Significant Other Observable Inputs (Level 2) [Member]
Wholesale Distribution [Member]
USD ($)
Dec. 31, 2014
Significant Other Observable Inputs (Level 2) [Member]
Foreign Pension Benefits [Member]
USD ($)
Dec. 31, 2013
Significant Other Observable Inputs (Level 2) [Member]
Foreign Pension Benefits [Member]
USD ($)
Dec. 31, 2014
Significant Other Observable Inputs (Level 2) [Member]
Foreign Pension Benefits [Member]
Equity Securities [Member]
USD ($)
Dec. 31, 2013
Significant Other Observable Inputs (Level 2) [Member]
Foreign Pension Benefits [Member]
Equity Securities [Member]
USD ($)
Dec. 31, 2014
Significant Other Observable Inputs (Level 2) [Member]
Foreign Pension Benefits [Member]
Equity Securities [Member]
International [Member]
Commingled Funds [Member]
USD ($)
Dec. 31, 2013
Significant Other Observable Inputs (Level 2) [Member]
Foreign Pension Benefits [Member]
Equity Securities [Member]
International [Member]
Commingled Funds [Member]
USD ($)
Dec. 31, 2014
Significant Other Observable Inputs (Level 2) [Member]
Foreign Pension Benefits [Member]
Equity Securities [Member]
U.K. [Member]
Commingled Funds [Member]
USD ($)
Dec. 31, 2013
Significant Other Observable Inputs (Level 2) [Member]
Foreign Pension Benefits [Member]
Equity Securities [Member]
U.K. [Member]
Commingled Funds [Member]
USD ($)
Dec. 31, 2014
Significant Other Observable Inputs (Level 2) [Member]
Foreign Pension Benefits [Member]
Fixed - Income Securities [Member]
U.K. [Member]
Commingled Funds [Member]
USD ($)
Dec. 31, 2013
Significant Other Observable Inputs (Level 2) [Member]
Foreign Pension Benefits [Member]
Fixed - Income Securities [Member]
U.K. [Member]
Commingled Funds [Member]
USD ($)
Dec. 31, 2014
Significant Other Observable Inputs (Level 2) [Member]
Foreign Pension Benefits [Member]
Alternative Investments [Member]
Hedge and Absolute Return Funds [Member]
USD ($)
Dec. 31, 2013
Significant Other Observable Inputs (Level 2) [Member]
Foreign Pension Benefits [Member]
Alternative Investments [Member]
Hedge and Absolute Return Funds [Member]
USD ($)
Dec. 31, 2014
Significant Other Observable Inputs (Level 2) [Member]
Foreign Pension Benefits [Member]
Other (Primarily Cash and Cash Equivalents) [Member]
USD ($)
Dec. 31, 2013
Significant Other Observable Inputs (Level 2) [Member]
Foreign Pension Benefits [Member]
Other (Primarily Cash and Cash Equivalents) [Member]
USD ($)
Dec. 31, 2013
Significant Other Observable Inputs (Level 2) [Member]
U.S. Pension Benefits [Member]
USD ($)
Dec. 31, 2014
Significant Other Observable Inputs (Level 2) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
USD ($)
Dec. 31, 2013
Significant Other Observable Inputs (Level 2) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
USD ($)
Dec. 31, 2014
Significant Other Observable Inputs (Level 2) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Capital Goods [Member]
USD ($)
Dec. 31, 2013
Significant Other Observable Inputs (Level 2) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Capital Goods [Member]
USD ($)
Dec. 31, 2014
Significant Other Observable Inputs (Level 2) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Chemicals [Member]
USD ($)
Dec. 31, 2013
Significant Other Observable Inputs (Level 2) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Chemicals [Member]
USD ($)
Dec. 31, 2014
Significant Other Observable Inputs (Level 2) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Commercial Property [Member]
USD ($)
Dec. 31, 2013
Significant Other Observable Inputs (Level 2) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Commercial Property [Member]
USD ($)
Dec. 31, 2014
Significant Other Observable Inputs (Level 2) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Commercial Services [Member]
USD ($)
Dec. 31, 2013
Significant Other Observable Inputs (Level 2) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Commercial Services [Member]
USD ($)
Dec. 31, 2014
Significant Other Observable Inputs (Level 2) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Common Collective Trust Funds [Member]
USD ($)
Dec. 31, 2013
Significant Other Observable Inputs (Level 2) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Common Collective Trust Funds [Member]
USD ($)
Dec. 31, 2014
Significant Other Observable Inputs (Level 2) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Electronics [Member]
USD ($)
Dec. 31, 2013
Significant Other Observable Inputs (Level 2) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Electronics [Member]
USD ($)
Dec. 31, 2014
Significant Other Observable Inputs (Level 2) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Engineering & Construction [Member]
USD ($)
Dec. 31, 2013
Significant Other Observable Inputs (Level 2) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Engineering & Construction [Member]
USD ($)
Dec. 31, 2014
Significant Other Observable Inputs (Level 2) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Food Processing [Member]
USD ($)
Dec. 31, 2013
Significant Other Observable Inputs (Level 2) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Food Processing [Member]
USD ($)
Dec. 31, 2014
Significant Other Observable Inputs (Level 2) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Health Care [Member]
USD ($)
Dec. 31, 2013
Significant Other Observable Inputs (Level 2) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Health Care [Member]
USD ($)
Dec. 31, 2014
Significant Other Observable Inputs (Level 2) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Limited Partnerships - Public Equity [Member]
USD ($)
Dec. 31, 2013
Significant Other Observable Inputs (Level 2) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Limited Partnerships - Public Equity [Member]
USD ($)
Dec. 31, 2014
Significant Other Observable Inputs (Level 2) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Manufacturing [Member]
USD ($)
Dec. 31, 2013
Significant Other Observable Inputs (Level 2) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Manufacturing [Member]
USD ($)
Dec. 31, 2014
Significant Other Observable Inputs (Level 2) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Oil & Gas [Member]
USD ($)
Dec. 31, 2013
Significant Other Observable Inputs (Level 2) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Oil & Gas [Member]
USD ($)
Dec. 31, 2014
Significant Other Observable Inputs (Level 2) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Retail [Member]
USD ($)
Dec. 31, 2013
Significant Other Observable Inputs (Level 2) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Retail [Member]
USD ($)
Dec. 31, 2014
Significant Other Observable Inputs (Level 2) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Technology [Member]
USD ($)
Dec. 31, 2013
Significant Other Observable Inputs (Level 2) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Technology [Member]
USD ($)
Dec. 31, 2014
Significant Other Observable Inputs (Level 2) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
U.S., Other [Member]
USD ($)
Dec. 31, 2013
Significant Other Observable Inputs (Level 2) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
U.S., Other [Member]
USD ($)
Dec. 31, 2014
Significant Other Observable Inputs (Level 2) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
International [Member]
Common Collective Trust Funds [Member]
USD ($)
Dec. 31, 2013
Significant Other Observable Inputs (Level 2) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
International [Member]
Common Collective Trust Funds [Member]
USD ($)
Dec. 31, 2014
Significant Other Observable Inputs (Level 2) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
International [Member]
Engineering & Construction [Member]
USD ($)
Dec. 31, 2013
Significant Other Observable Inputs (Level 2) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
International [Member]
Engineering & Construction [Member]
USD ($)
Dec. 31, 2014
Significant Other Observable Inputs (Level 2) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
International [Member]
Oil & Gas [Member]
USD ($)
Dec. 31, 2013
Significant Other Observable Inputs (Level 2) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
International [Member]
Oil & Gas [Member]
USD ($)
Dec. 31, 2014
Significant Other Observable Inputs (Level 2) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
International [Member]
Technology [Member]
USD ($)
Dec. 31, 2013
Significant Other Observable Inputs (Level 2) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
International [Member]
Technology [Member]
USD ($)
Dec. 31, 2014
Significant Other Observable Inputs (Level 2) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
International [Member]
Bank & Financial Services [Member]
USD ($)
Dec. 31, 2013
Significant Other Observable Inputs (Level 2) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
International [Member]
Bank & Financial Services [Member]
USD ($)
Dec. 31, 2014
Significant Other Observable Inputs (Level 2) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
International [Member]
Real Estate [Member]
USD ($)
Dec. 31, 2013
Significant Other Observable Inputs (Level 2) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
International [Member]
Real Estate [Member]
USD ($)
Dec. 31, 2014
Significant Other Observable Inputs (Level 2) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
International [Member]
International, Other [Member]
USD ($)
Dec. 31, 2013
Significant Other Observable Inputs (Level 2) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
International [Member]
International, Other [Member]
USD ($)
Dec. 31, 2014
Significant Other Observable Inputs (Level 2) [Member]
U.S. Pension Benefits [Member]
Fixed - Income Securities [Member]
USD ($)
Dec. 31, 2013
Significant Other Observable Inputs (Level 2) [Member]
U.S. Pension Benefits [Member]
Fixed - Income Securities [Member]
USD ($)
Dec. 31, 2014
Significant Other Observable Inputs (Level 2) [Member]
U.S. Pension Benefits [Member]
Fixed - Income Securities [Member]
Commingled Funds [Member]
USD ($)
Dec. 31, 2013
Significant Other Observable Inputs (Level 2) [Member]
U.S. Pension Benefits [Member]
Fixed - Income Securities [Member]
Commingled Funds [Member]
USD ($)
Dec. 31, 2014
Significant Other Observable Inputs (Level 2) [Member]
U.S. Pension Benefits [Member]
Fixed - Income Securities [Member]
Preferred (Fixed Income Securities) [Member]
USD ($)
Dec. 31, 2013
Significant Other Observable Inputs (Level 2) [Member]
U.S. Pension Benefits [Member]
Fixed - Income Securities [Member]
Preferred (Fixed Income Securities) [Member]
USD ($)
Dec. 31, 2014
Significant Other Observable Inputs (Level 2) [Member]
U.S. Pension Benefits [Member]
Fixed - Income Securities [Member]
Other (Fixed Income Securities) [Member]
USD ($)
Dec. 31, 2013
Significant Other Observable Inputs (Level 2) [Member]
U.S. Pension Benefits [Member]
Fixed - Income Securities [Member]
Other (Fixed Income Securities) [Member]
USD ($)
Dec. 31, 2014
Significant Other Observable Inputs (Level 2) [Member]
U.S. Pension Benefits [Member]
Alternative Investments [Member]
USD ($)
Dec. 31, 2013
Significant Other Observable Inputs (Level 2) [Member]
U.S. Pension Benefits [Member]
Alternative Investments [Member]
USD ($)
Dec. 31, 2014
Significant Other Observable Inputs (Level 2) [Member]
U.S. Pension Benefits [Member]
Alternative Investments [Member]
Hedge and Absolute Return Funds [Member]
USD ($)
Dec. 31, 2013
Significant Other Observable Inputs (Level 2) [Member]
U.S. Pension Benefits [Member]
Alternative Investments [Member]
Hedge and Absolute Return Funds [Member]
USD ($)
Dec. 31, 2014
Significant Other Observable Inputs (Level 2) [Member]
U.S. Pension Benefits [Member]
Alternative Investments [Member]
Managed Funds [Member]
USD ($)
Dec. 31, 2013
Significant Other Observable Inputs (Level 2) [Member]
U.S. Pension Benefits [Member]
Alternative Investments [Member]
Managed Funds [Member]
USD ($)
Dec. 31, 2014
Significant Other Observable Inputs (Level 2) [Member]
U.S. Pension Benefits [Member]
Other (Primarily Cash and Cash Equivalents) [Member]
USD ($)
Dec. 31, 2013
Significant Other Observable Inputs (Level 2) [Member]
U.S. Pension Benefits [Member]
Other (Primarily Cash and Cash Equivalents) [Member]
USD ($)
Dec. 31, 2014
Significant Other Observable Inputs (Level 2) [Member]
U.S. Pension Benefits [Member]
Other (Primarily Cash and Cash Equivalents) [Member]
Commingled Funds [Member]
USD ($)
Dec. 31, 2013
Significant Other Observable Inputs (Level 2) [Member]
U.S. Pension Benefits [Member]
Other (Primarily Cash and Cash Equivalents) [Member]
Commingled Funds [Member]
USD ($)
Dec. 31, 2014
Significant Other Observable Inputs (Level 2) [Member]
U.S. Pension Benefits [Member]
Other (Primarily Cash and Cash Equivalents) [Member]
Mutual Funds [Member]
USD ($)
Dec. 31, 2013
Significant Other Observable Inputs (Level 2) [Member]
U.S. Pension Benefits [Member]
Other (Primarily Cash and Cash Equivalents) [Member]
Mutual Funds [Member]
USD ($)
Dec. 31, 2014
Significant Other Observable Inputs (Level 2) [Member]
U.S. Pension Benefits [Member]
Other (Primarily Cash and Cash Equivalents) [Member]
Other [Member]
USD ($)
Dec. 31, 2013
Significant Other Observable Inputs (Level 2) [Member]
U.S. Pension Benefits [Member]
Other (Primarily Cash and Cash Equivalents) [Member]
Other [Member]
USD ($)
Dec. 31, 2014
Significant Unobservable Inputs (Level 3) [Member]
USD ($)
Dec. 31, 2014
Significant Unobservable Inputs (Level 3) [Member]
Transportation [Member]
USD ($)
Dec. 31, 2014
Significant Unobservable Inputs (Level 3) [Member]
Wholesale Distribution [Member]
USD ($)
Dec. 31, 2014
Significant Unobservable Inputs (Level 3) [Member]
Foreign Pension Benefits [Member]
USD ($)
Dec. 31, 2013
Significant Unobservable Inputs (Level 3) [Member]
Foreign Pension Benefits [Member]
USD ($)
Dec. 31, 2012
Significant Unobservable Inputs (Level 3) [Member]
Foreign Pension Benefits [Member]
USD ($)
Dec. 31, 2014
Significant Unobservable Inputs (Level 3) [Member]
Foreign Pension Benefits [Member]
Equity Securities [Member]
USD ($)
Dec. 31, 2013
Significant Unobservable Inputs (Level 3) [Member]
Foreign Pension Benefits [Member]
Equity Securities [Member]
USD ($)
Dec. 31, 2014
Significant Unobservable Inputs (Level 3) [Member]
Foreign Pension Benefits [Member]
Equity Securities [Member]
International [Member]
Commingled Funds [Member]
USD ($)
Dec. 31, 2013
Significant Unobservable Inputs (Level 3) [Member]
Foreign Pension Benefits [Member]
Equity Securities [Member]
International [Member]
Commingled Funds [Member]
USD ($)
Dec. 31, 2014
Significant Unobservable Inputs (Level 3) [Member]
Foreign Pension Benefits [Member]
Equity Securities [Member]
U.K. [Member]
Commingled Funds [Member]
USD ($)
Dec. 31, 2013
Significant Unobservable Inputs (Level 3) [Member]
Foreign Pension Benefits [Member]
Equity Securities [Member]
U.K. [Member]
Commingled Funds [Member]
USD ($)
Dec. 31, 2014
Significant Unobservable Inputs (Level 3) [Member]
Foreign Pension Benefits [Member]
Fixed - Income Securities [Member]
U.K. [Member]
Commingled Funds [Member]
USD ($)
Dec. 31, 2013
Significant Unobservable Inputs (Level 3) [Member]
Foreign Pension Benefits [Member]
Fixed - Income Securities [Member]
U.K. [Member]
Commingled Funds [Member]
USD ($)
Dec. 31, 2014
Significant Unobservable Inputs (Level 3) [Member]
Foreign Pension Benefits [Member]
Alternative Investments [Member]
Hedge and Absolute Return Funds [Member]
USD ($)
Dec. 31, 2013
Significant Unobservable Inputs (Level 3) [Member]
Foreign Pension Benefits [Member]
Alternative Investments [Member]
Hedge and Absolute Return Funds [Member]
USD ($)
Dec. 31, 2014
Significant Unobservable Inputs (Level 3) [Member]
Foreign Pension Benefits [Member]
Other (Primarily Cash and Cash Equivalents) [Member]
USD ($)
Dec. 31, 2013
Significant Unobservable Inputs (Level 3) [Member]
Foreign Pension Benefits [Member]
Other (Primarily Cash and Cash Equivalents) [Member]
USD ($)
Dec. 31, 2013
Significant Unobservable Inputs (Level 3) [Member]
U.S. Pension Benefits [Member]
USD ($)
Dec. 31, 2014
Significant Unobservable Inputs (Level 3) [Member]
U.S. Pension Benefits [Member]
Hedge and Absolute Return Funds [Member]
USD ($)
Dec. 31, 2013
Significant Unobservable Inputs (Level 3) [Member]
U.S. Pension Benefits [Member]
Hedge and Absolute Return Funds [Member]
USD ($)
Dec. 31, 2012
Significant Unobservable Inputs (Level 3) [Member]
U.S. Pension Benefits [Member]
Hedge and Absolute Return Funds [Member]
USD ($)
Dec. 31, 2014
Significant Unobservable Inputs (Level 3) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
USD ($)
Dec. 31, 2013
Significant Unobservable Inputs (Level 3) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
USD ($)
Dec. 31, 2014
Significant Unobservable Inputs (Level 3) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Capital Goods [Member]
USD ($)
Dec. 31, 2013
Significant Unobservable Inputs (Level 3) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Capital Goods [Member]
USD ($)
Dec. 31, 2014
Significant Unobservable Inputs (Level 3) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Chemicals [Member]
USD ($)
Dec. 31, 2013
Significant Unobservable Inputs (Level 3) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Chemicals [Member]
USD ($)
Dec. 31, 2014
Significant Unobservable Inputs (Level 3) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Commercial Property [Member]
USD ($)
Dec. 31, 2013
Significant Unobservable Inputs (Level 3) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Commercial Property [Member]
USD ($)
Dec. 31, 2014
Significant Unobservable Inputs (Level 3) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Commercial Services [Member]
USD ($)
Dec. 31, 2013
Significant Unobservable Inputs (Level 3) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Commercial Services [Member]
USD ($)
Dec. 31, 2014
Significant Unobservable Inputs (Level 3) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Common Collective Trust Funds [Member]
USD ($)
Dec. 31, 2013
Significant Unobservable Inputs (Level 3) [Member]
U.S. Pension Benefits [Member]
Equity Securities [Member]
U.S. [Member]
Common Collective Trust Funds [Member]
USD ($)
Dec. 31, 2014
Significant Unobservable Inputs (Level 3) [Member]
U.S. Pension Benefits [Member]
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