To determine our discount rate, we project a cash flow based on annual accrued benefits. For active participants, the benefits under the respective pension plans are projected to the date of termination. The projected plan cash flow is discounted to the measurement date, which is the last day of our fiscal year, using the annual spot rates provided in the Ryan Curve. A single discount rate is then computed so that the present value of the benefit cash flow equals the present value computed using the Ryan Curve rates. 

In determining the expected long-term rate of return on assets, we evaluated input from our investment consultants, actuaries and investment management firms, including our review of asset class return expectations, as well as long-term historical asset class returns. Projected returns by such consultants and economists are based on broad equity and bond indices. Our objective is to select an average rate of earnings expected on existing plan assets and expected contributions to the plan during the year. 

The value (“market-related value”) of plan assets is multiplied by the expected long-term rate of return on assets to compute the expected return on plan assets, a component of net periodic pension cost. The market-related value of plan assets is a calculated value that recognizes changes in fair value over three years. 

On October 27, 2014, the Society of Actuaries (“SOA”) released new mortality tables that increased life expectancy assumptions. During the fourth quarter of 2014, we adopted the new mortality tables and revised the mortality assumptions used in determining our pension and postretirement benefit obligations. The net impact to our qualified and non-qualified pension obligations resulting from the new mortality assumptions was an increase of $117.0 million. 

## Plan Assets 

## Company-Sponsored Pension Plans 

The assets underlying the Company-sponsored qualified pension plans are managed by professional investment managers. These investment managers are selected and monitored by the pension investment committee, composed of certain senior executives, who are appointed by the Finance Committee of the Board of Directors of the Company. The Finance Committee is responsible for adopting our investment policy, which includes rules regarding the selection and retention of qualified advisors and investment managers. The pension investment committee is responsible for implementing and monitoring compliance with our investment policy, selecting and monitoring investment managers and communicating the investment guidelines and performance objectives to the investment managers. 

Our contributions are made on a basis determined by the actuaries in accordance with the funding requirements and limitations of the Employee Retirement Income Security Act (“ERISA”) and the Internal Revenue Code. 

## Investment Policy and Strategy 

The primary long-term investment objective is to allocate assets in a manner that produces a total rate of return that meets or exceeds the growth of our pension liabilities. Our plan objective is to transition the asset mix to hedge liabilities and minimize volatility in the funded status of the plans. 

## Asset Allocation Guidelines 

In accordance with our asset allocation strategy, for substantially all of our Company-sponsored pension plan assets, investments are categorized into long duration fixed income investments whose value is highly correlated to that of the pension plan obligations (“Long Duration Assets”) or other investments, such as equities and high-yield fixed income securities, whose return over time is expected to exceed the rate of growth in our pension plan obligations (“Return-Seeking Assets”). 

The proportional allocation of assets between Long Duration Assets and Return-Seeking Assets is dependent on the funded status of each pension plan. Under our policy, for example, a funded status between 85% and 90% requires an allocation of total assets of 46% to 56% to Long Duration Assets and 44% to 54% to Return-Seeking Assets. As our funded status increases, the allocation to Long Duration Assets will increase and the allocation to Return-Seeking Assets will decrease. 

