Fair Value of Pension Benefit Plan Assets (Detail) (Pension Plans, Defined Benefit, USD $)
In Millions, unless otherwise specified

Cash and Cash Equivalents

International Equity

Emerging Markets Equity

Asset Backed Securities

Mortgage Backed Securities

Fixed Income Derivative

Common And Preferred Stock

Fair Value, Inputs, Level 1

Fair Value, Inputs, Level 1 | Cash and Cash Equivalents

Fair Value, Inputs, Level 1 | U.S. Large Cap

Fair Value, Inputs, Level 1 | U.S. Small-Mid Cap

Fair Value, Inputs, Level 1 | Canadian Equity

Fair Value, Inputs, Level 1 | International Equity

Fair Value, Inputs, Level 1 | Emerging Markets Equity

Fair Value, Inputs, Level 1 | Equity Derivatives

Fair Value, Inputs, Level 1 | Corporate Bonds

Fair Value, Inputs, Level 1 | Government Bonds

Fair Value, Inputs, Level 1 | Asset Backed Securities

Fair Value, Inputs, Level 1 | Mortgage Backed Securities

Fair Value, Inputs, Level 1 | Fixed Income Derivative

Fair Value, Inputs, Level 1 | Common And Preferred Stock

Fair Value, Inputs, Level 1 | Commodities

Fair Value, Inputs, Level 1 | Hedge Funds

Fair Value, Inputs, Level 1 | Private Equity

Fair Value, Inputs, Level 1 | Mutual Funds

Fair Value, Inputs, Level 1 | Real Estate

Fair Value, Inputs, Level 2

Fair Value, Inputs, Level 2 | Cash and Cash Equivalents

Fair Value, Inputs, Level 2 | U.S. Large Cap

Fair Value, Inputs, Level 2 | U.S. Small-Mid Cap

Fair Value, Inputs, Level 2 | Canadian Equity

Fair Value, Inputs, Level 2 | International Equity

Fair Value, Inputs, Level 2 | Emerging Markets Equity

Fair Value, Inputs, Level 2 | Equity Derivatives

Fair Value, Inputs, Level 2 | Corporate Bonds

Fair Value, Inputs, Level 2 | Government Bonds

Fair Value, Inputs, Level 2 | Asset Backed Securities

Fair Value, Inputs, Level 2 | Mortgage Backed Securities

Fair Value, Inputs, Level 2 | Fixed Income Derivative

Fair Value, Inputs, Level 2 | Common And Preferred Stock

Fair Value, Inputs, Level 2 | Commodities

Fair Value, Inputs, Level 2 | Hedge Funds

Fair Value, Inputs, Level 2 | Private Equity

Fair Value, Inputs, Level 2 | Mutual Funds

Fair Value, Inputs, Level 2 | Real Estate

Fair Value, Inputs, Level 3

Fair Value, Inputs, Level 3 | Cash and Cash Equivalents

Fair Value, Inputs, Level 3 | U.S. Large Cap

Fair Value, Inputs, Level 3 | U.S. Small-Mid Cap

Fair Value, Inputs, Level 3 | Canadian Equity

Fair Value, Inputs, Level 3 | International Equity

Fair Value, Inputs, Level 3 | Emerging Markets Equity

Fair Value, Inputs, Level 3 | Equity Derivatives

Fair Value, Inputs, Level 3 | Corporate Bonds

Fair Value, Inputs, Level 3 | Government Bonds

Fair Value, Inputs, Level 3 | Asset Backed Securities

Fair Value, Inputs, Level 3 | Mortgage Backed Securities

Fair Value, Inputs, Level 3 | Fixed Income Derivative

Fair Value, Inputs, Level 3 | Common And Preferred Stock

Fair Value, Inputs, Level 3 | Commodities

Fair Value, Inputs, Level 3 | Hedge Funds

Fair Value, Inputs, Level 3 | Private Equity

Fair Value, Inputs, Level 3 | Mutual Funds

Fair Value, Inputs, Level 3 | Real Estate

- Definition

Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets.

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