RETIREMENT BENEFITS - Plan Assets at Fair Value by Investment Category and Valuation Hierarchy Level (Detail) (USD $) | Dec. 31, 2013 | Dec. 31, 2012 |
In Thousands, unless otherwise specified |
Defined Benefit Plan Disclosure [Line Items] | ' | | ' | |
Plan assets at fair value | $779,626 | | $565,707 | |
Global Equities | ' | | ' | |
Defined Benefit Plan Disclosure [Line Items] | ' | | ' | |
Plan assets at fair value | 6,027 | | 5,772 | |
International Funds | ' | | ' | |
Defined Benefit Plan Disclosure [Line Items] | ' | | ' | |
Plan assets at fair value | 209,553 | [1] | 128,921 | [1] |
Emerging Markets Growth Funds | ' | | ' | |
Defined Benefit Plan Disclosure [Line Items] | ' | | ' | |
Plan assets at fair value | 21,258 | | 12,636 | |
U.S. Large-Cap Growth Funds | ' | | ' | |
Defined Benefit Plan Disclosure [Line Items] | ' | | ' | |
Plan assets at fair value | 11,677 | | 3,012 | |
U.S. Mid-Cap Growth Funds | ' | | ' | |
Defined Benefit Plan Disclosure [Line Items] | ' | | ' | |
Plan assets at fair value | 843 | | 711 | |
U.S. Small-Cap Growth Funds | ' | | ' | |
Defined Benefit Plan Disclosure [Line Items] | ' | | ' | |
Plan assets at fair value | 492 | | 400 | |
U.S. Small-Cap Value Funds | ' | | ' | |
Defined Benefit Plan Disclosure [Line Items] | ' | | ' | |
Plan assets at fair value | 493 | | 414 | |
Euro Government Bonds | ' | | ' | |
Defined Benefit Plan Disclosure [Line Items] | ' | | ' | |
Plan assets at fair value | 202,324 | [2] | 183,993 | [2] |
Euro Corporate Bonds | ' | | ' | |
Defined Benefit Plan Disclosure [Line Items] | ' | | ' | |
Plan assets at fair value | 82,096 | [3] | 90,620 | [3] |
U.K. Government Index-Linked Bonds | ' | | ' | |
Defined Benefit Plan Disclosure [Line Items] | ' | | ' | |
Plan assets at fair value | 93,540 | [4] | 23,543 | [4] |
U.K. Corporate Bonds | ' | | ' | |
Defined Benefit Plan Disclosure [Line Items] | ' | | ' | |
Plan assets at fair value | 18,212 | [5] | 17,299 | [5] |
Other International Bonds | ' | | ' | |
Defined Benefit Plan Disclosure [Line Items] | ' | | ' | |
Plan assets at fair value | 69,820 | [6] | 56,194 | [6] |
U.S. Corporate and Government Bonds | ' | | ' | |
Defined Benefit Plan Disclosure [Line Items] | ' | | ' | |
Plan assets at fair value | 2,741 | | 2,315 | |
Guaranteed Investment Contracts | ' | | ' | |
Defined Benefit Plan Disclosure [Line Items] | ' | | ' | |
Plan assets at fair value | 852 | | 918 | |
Commodities | ' | | ' | |
Defined Benefit Plan Disclosure [Line Items] | ' | | ' | |
Plan assets at fair value | 10,920 | | 9,578 | |
Asset Allocation Fund | ' | | ' | |
Defined Benefit Plan Disclosure [Line Items] | ' | | ' | |
Plan assets at fair value | 48,778 | [7] | 29,381 | [7] |
Quoted Market Prices In Active Markets (Level 1) | ' | | ' | |
Defined Benefit Plan Disclosure [Line Items] | ' | | ' | |
Plan assets at fair value | 6,027 | | 5,772 | |
Quoted Market Prices In Active Markets (Level 1) | Global Equities | ' | | ' | |
Defined Benefit Plan Disclosure [Line Items] | ' | | ' | |
Plan assets at fair value | 6,027 | | 5,772 | |
Quoted Market Prices In Active Markets (Level 1) | International Funds | ' | | ' | |
Defined Benefit Plan Disclosure [Line Items] | ' | | ' | |
Plan assets at fair value | 0 | [1] | 0 | [1] |
Quoted Market Prices In Active Markets (Level 1) | Emerging Markets Growth Funds | ' | | ' | |
Defined Benefit Plan Disclosure [Line Items] | ' | | ' | |
Plan assets at fair value | 0 | | 0 | |
Quoted Market Prices In Active Markets (Level 1) | U.S. Large-Cap Growth Funds | ' | | ' | |
Defined Benefit Plan Disclosure [Line Items] | ' | | ' | |
Plan assets at fair value | 0 | | 0 | |
Quoted Market Prices In Active Markets (Level 1) | U.S. Mid-Cap Growth Funds | ' | | ' | |
Defined Benefit Plan Disclosure [Line Items] | ' | | ' | |
Plan assets at fair value | 0 | | 0 | |
Quoted Market Prices In Active Markets (Level 1) | U.S. Small-Cap Growth Funds | ' | | ' | |
Defined Benefit Plan Disclosure [Line Items] | ' | | ' | |
Plan assets at fair value | 0 | | 0 | |
Quoted Market Prices In Active Markets (Level 1) | U.S. Small-Cap Value Funds | ' | | ' | |
Defined Benefit Plan Disclosure [Line Items] | ' | | ' | |
Plan assets at fair value | 0 | | 0 | |
Quoted Market Prices In Active Markets (Level 1) | Euro Government Bonds | ' | | ' | |
Defined Benefit Plan Disclosure [Line Items] | ' | | ' | |
Plan assets at fair value | 0 | [2] | 0 | [2] |
Quoted Market Prices In Active Markets (Level 1) | Euro Corporate Bonds | ' | | ' | |
Defined Benefit Plan Disclosure [Line Items] | ' | | ' | |
Plan assets at fair value | 0 | [3] | 0 | [3] |
Quoted Market Prices In Active Markets (Level 1) | U.K. Government Index-Linked Bonds | ' | | ' | |
Defined Benefit Plan Disclosure [Line Items] | ' | | ' | |
Plan assets at fair value | 0 | [4] | 0 | [4] |
Quoted Market Prices In Active Markets (Level 1) | U.K. Corporate Bonds | ' | | ' | |
Defined Benefit Plan Disclosure [Line Items] | ' | | ' | |
Plan assets at fair value | 0 | [5] | 0 | [5] |
Quoted Market Prices In Active Markets (Level 1) | Other International Bonds | ' | | ' | |
Defined Benefit Plan Disclosure [Line Items] | ' | | ' | |
Plan assets at fair value | 0 | [6] | 0 | [6] |
Quoted Market Prices In Active Markets (Level 1) | U.S. Corporate and Government Bonds | ' | | ' | |
Defined Benefit Plan Disclosure [Line Items] | ' | | ' | |
Plan assets at fair value | 0 | | 0 | |
Quoted Market Prices In Active Markets (Level 1) | Guaranteed Investment Contracts | ' | | ' | |
Defined Benefit Plan Disclosure [Line Items] | ' | | ' | |
Plan assets at fair value | 0 | | 0 | |
Quoted Market Prices In Active Markets (Level 1) | Commodities | ' | | ' | |
Defined Benefit Plan Disclosure [Line Items] | ' | | ' | |
Plan assets at fair value | 0 | | 0 | |
Quoted Market Prices In Active Markets (Level 1) | Asset Allocation Fund | ' | | ' | |
Defined Benefit Plan Disclosure [Line Items] | ' | | ' | |
Plan assets at fair value | 0 | [7] | 0 | [7] |
Internal Models With Significant Observable Market Parameters (Level 2) | ' | | ' | |
Defined Benefit Plan Disclosure [Line Items] | ' | | ' | |
Plan assets at fair value | 773,599 | | 559,935 | |
Internal Models With Significant Observable Market Parameters (Level 2) | Global Equities | ' | | ' | |
Defined Benefit Plan Disclosure [Line Items] | ' | | ' | |
Plan assets at fair value | 0 | | 0 | |
Internal Models With Significant Observable Market Parameters (Level 2) | International Funds | ' | | ' | |
Defined Benefit Plan Disclosure [Line Items] | ' | | ' | |
Plan assets at fair value | 209,553 | [1] | 128,921 | [1] |
Internal Models With Significant Observable Market Parameters (Level 2) | Emerging Markets Growth Funds | ' | | ' | |
Defined Benefit Plan Disclosure [Line Items] | ' | | ' | |
Plan assets at fair value | 21,258 | | 12,636 | |
Internal Models With Significant Observable Market Parameters (Level 2) | U.S. Large-Cap Growth Funds | ' | | ' | |
Defined Benefit Plan Disclosure [Line Items] | ' | | ' | |
Plan assets at fair value | 11,677 | | 3,012 | |
Internal Models With Significant Observable Market Parameters (Level 2) | U.S. Mid-Cap Growth Funds | ' | | ' | |
Defined Benefit Plan Disclosure [Line Items] | ' | | ' | |
Plan assets at fair value | 843 | | 711 | |
Internal Models With Significant Observable Market Parameters (Level 2) | U.S. Small-Cap Growth Funds | ' | | ' | |
Defined Benefit Plan Disclosure [Line Items] | ' | | ' | |
Plan assets at fair value | 492 | | 400 | |
Internal Models With Significant Observable Market Parameters (Level 2) | U.S. Small-Cap Value Funds | ' | | ' | |
Defined Benefit Plan Disclosure [Line Items] | ' | | ' | |
Plan assets at fair value | 493 | | 414 | |
Internal Models With Significant Observable Market Parameters (Level 2) | Euro Government Bonds | ' | | ' | |
Defined Benefit Plan Disclosure [Line Items] | ' | | ' | |
Plan assets at fair value | 202,324 | [2] | 183,993 | [2] |
Internal Models With Significant Observable Market Parameters (Level 2) | Euro Corporate Bonds | ' | | ' | |
Defined Benefit Plan Disclosure [Line Items] | ' | | ' | |
Plan assets at fair value | 82,096 | [3] | 90,620 | [3] |
Internal Models With Significant Observable Market Parameters (Level 2) | U.K. Government Index-Linked Bonds | ' | | ' | |
Defined Benefit Plan Disclosure [Line Items] | ' | | ' | |
Plan assets at fair value | 93,540 | [4] | 23,543 | [4] |
Internal Models With Significant Observable Market Parameters (Level 2) | U.K. Corporate Bonds | ' | | ' | |
Defined Benefit Plan Disclosure [Line Items] | ' | | ' | |
Plan assets at fair value | 18,212 | [5] | 17,299 | [5] |
Internal Models With Significant Observable Market Parameters (Level 2) | Other International Bonds | ' | | ' | |
Defined Benefit Plan Disclosure [Line Items] | ' | | ' | |
Plan assets at fair value | 69,820 | [6] | 56,194 | [6] |
Internal Models With Significant Observable Market Parameters (Level 2) | U.S. Corporate and Government Bonds | ' | | ' | |
Defined Benefit Plan Disclosure [Line Items] | ' | | ' | |
Plan assets at fair value | 2,741 | | 2,315 | |
Internal Models With Significant Observable Market Parameters (Level 2) | Guaranteed Investment Contracts | ' | | ' | |
Defined Benefit Plan Disclosure [Line Items] | ' | | ' | |
Plan assets at fair value | 852 | | 918 | |
Internal Models With Significant Observable Market Parameters (Level 2) | Commodities | ' | | ' | |
Defined Benefit Plan Disclosure [Line Items] | ' | | ' | |
Plan assets at fair value | 10,920 | | 9,578 | |
Internal Models With Significant Observable Market Parameters (Level 2) | Asset Allocation Fund | ' | | ' | |
Defined Benefit Plan Disclosure [Line Items] | ' | | ' | |
Plan assets at fair value | 48,778 | [7] | 29,381 | [7] |
Internal Models With Significant Unobservable Market Parameters (Level 3) | ' | | ' | |
Defined Benefit Plan Disclosure [Line Items] | ' | | ' | |
Plan assets at fair value | 0 | | 0 | |
Internal Models With Significant Unobservable Market Parameters (Level 3) | Global Equities | ' | | ' | |
Defined Benefit Plan Disclosure [Line Items] | ' | | ' | |
Plan assets at fair value | 0 | | 0 | |
Internal Models With Significant Unobservable Market Parameters (Level 3) | International Funds | ' | | ' | |
Defined Benefit Plan Disclosure [Line Items] | ' | | ' | |
Plan assets at fair value | 0 | [1] | 0 | [1] |
Internal Models With Significant Unobservable Market Parameters (Level 3) | Emerging Markets Growth Funds | ' | | ' | |
Defined Benefit Plan Disclosure [Line Items] | ' | | ' | |
Plan assets at fair value | 0 | | 0 | |
Internal Models With Significant Unobservable Market Parameters (Level 3) | U.S. Large-Cap Growth Funds | ' | | ' | |
Defined Benefit Plan Disclosure [Line Items] | ' | | ' | |
Plan assets at fair value | 0 | | 0 | |
Internal Models With Significant Unobservable Market Parameters (Level 3) | U.S. Mid-Cap Growth Funds | ' | | ' | |
Defined Benefit Plan Disclosure [Line Items] | ' | | ' | |
Plan assets at fair value | 0 | | 0 | |
Internal Models With Significant Unobservable Market Parameters (Level 3) | U.S. Small-Cap Growth Funds | ' | | ' | |
Defined Benefit Plan Disclosure [Line Items] | ' | | ' | |
Plan assets at fair value | 0 | | 0 | |
Internal Models With Significant Unobservable Market Parameters (Level 3) | U.S. Small-Cap Value Funds | ' | | ' | |
Defined Benefit Plan Disclosure [Line Items] | ' | | ' | |
Plan assets at fair value | 0 | | 0 | |
Internal Models With Significant Unobservable Market Parameters (Level 3) | Euro Government Bonds | ' | | ' | |
Defined Benefit Plan Disclosure [Line Items] | ' | | ' | |
Plan assets at fair value | 0 | [2] | 0 | [2] |
Internal Models With Significant Unobservable Market Parameters (Level 3) | Euro Corporate Bonds | ' | | ' | |
Defined Benefit Plan Disclosure [Line Items] | ' | | ' | |
Plan assets at fair value | 0 | [3] | 0 | [3] |
Internal Models With Significant Unobservable Market Parameters (Level 3) | U.K. Government Index-Linked Bonds | ' | | ' | |
Defined Benefit Plan Disclosure [Line Items] | ' | | ' | |
Plan assets at fair value | 0 | [4] | 0 | [4] |
Internal Models With Significant Unobservable Market Parameters (Level 3) | U.K. Corporate Bonds | ' | | ' | |
Defined Benefit Plan Disclosure [Line Items] | ' | | ' | |
Plan assets at fair value | 0 | [5] | 0 | [5] |
Internal Models With Significant Unobservable Market Parameters (Level 3) | Other International Bonds | ' | | ' | |
Defined Benefit Plan Disclosure [Line Items] | ' | | ' | |
Plan assets at fair value | 0 | [6] | 0 | [6] |
Internal Models With Significant Unobservable Market Parameters (Level 3) | U.S. Corporate and Government Bonds | ' | | ' | |
Defined Benefit Plan Disclosure [Line Items] | ' | | ' | |
Plan assets at fair value | 0 | | 0 | |
Internal Models With Significant Unobservable Market Parameters (Level 3) | Guaranteed Investment Contracts | ' | | ' | |
Defined Benefit Plan Disclosure [Line Items] | ' | | ' | |
Plan assets at fair value | 0 | | 0 | |
Internal Models With Significant Unobservable Market Parameters (Level 3) | Commodities | ' | | ' | |
Defined Benefit Plan Disclosure [Line Items] | ' | | ' | |
Plan assets at fair value | 0 | | 0 | |
Internal Models With Significant Unobservable Market Parameters (Level 3) | Asset Allocation Fund | ' | | ' | |
Defined Benefit Plan Disclosure [Line Items] | ' | | ' | |
Plan assets at fair value | $0 | [7] | $0 | [7] |
|
[1] | Investments in various funds that track international indices. |
[2] | Investments in European Union government securities with credit ratings of primarily AAA. |
[3] | Investments in European fixed interest securities with credit ratings of primarily BBB and above. |
[4] | Investments predominantly in U.K. Treasury securities with credit ratings of primarily AAA. |
[5] | Investments predominantly in U.K. fixed interest securities with credit ratings of primarily BBB and above. |
[6] | Investments predominantly in various international fixed income obligations that are individually insignificant. |
[7] | Investments in fixed income securities, equities and alternative asset classes, including commodities and property assets. |