Employee Benefits	9 Months Ended
Sep. 30, 2013
Compensation and Retirement Disclosure [Abstract]
Employee Benefits	Employee Benefits We maintain a number of active defined contribution retirement plans for our employees. The majority of our defined benefit plans are frozen. As a result, no new employees will be permitted to enter these plans and no additional benefits for current participants in the frozen plans will be accrued. We also have supplemental benefit plans that provide senior management with supplemental retirement, disability and death benefits. Certain supplemental retirement benefits are based on final monthly earnings. In addition, we sponsor voluntary 401(k) plans under which we may match employee contributions up to certain levels of compensation as well as profit-sharing plans under which we contribute a percentage of eligible employees' compensation to the employees' accounts. We also provide certain medical, dental and life insurance benefits for active and retired employees and eligible dependents. The medical and dental plans and supplemental life insurance plan are contributory, while the basic life insurance plan is noncontributory. We currently do not prefund any of these plans. We recognize the funded status of our defined benefit retirement and postretirement plans in the consolidated balance sheets, with a corresponding adjustment to accumulated other comprehensive income, net of taxes. The amounts in accumulated other comprehensive income represent unrecognized actuarial losses and unrecognized prior service costs. These amounts will be subsequently recognized as net periodic pension cost pursuant to our accounting policy for amortizing such amounts. We recognized $6 million and $19 million of unrecognized actuarial losses and unrecognized prior service costs as net periodic benefit cost during the three and nine months ended September 30, 2013, respectively, and $8 million and $23 million during the three and nine months ended September 30, 2012, respectively. In the first nine months of 2013, we contributed $19 million to our retirement plans and expect to make additional required contributions of approximately $5 million to our retirement plans during the remainder of the year. We may elect to make additional non-required contributions depending on investment performance and the pension plan status in the fourth quarter of 2013.

Employee Benefits

We maintain a number of active defined contribution retirement plans for our employees. The majority of our defined benefit plans are frozen. As a result, no new employees will be permitted to enter these plans and no additional benefits for current participants in the frozen plans will be accrued.

We also have supplemental benefit plans that provide senior management with supplemental retirement, disability and death benefits. Certain supplemental retirement benefits are based on final monthly earnings. In addition, we sponsor voluntary 401(k) plans under which we may match employee contributions up to certain levels of compensation as well as profit-sharing plans under which we contribute a percentage of eligible employees' compensation to the employees' accounts.

We also provide certain medical, dental and life insurance benefits for active and retired employees and eligible dependents. The medical and dental plans and supplemental life insurance plan are contributory, while the basic life insurance plan is noncontributory. We currently do not prefund any of these plans.

We recognize the funded status of our defined benefit retirement and postretirement plans in the consolidated balance sheets, with a corresponding adjustment to accumulated other comprehensive income, net of taxes. The amounts in accumulated other comprehensive income represent unrecognized actuarial losses and unrecognized prior service costs. These amounts will be subsequently recognized as net periodic pension cost pursuant to our accounting policy for amortizing such amounts.

We recognized $6 million and $19 million of unrecognized actuarial losses and unrecognized prior service costs as net periodic benefit cost during the three and nine months ended September 30, 2013, respectively, and $8 million and $23 million during the three and nine months ended September 30, 2012, respectively.

In the first nine months of 2013, we contributed $19 million to our retirement plans and expect to make additional required contributions of approximately $5 million to our retirement plans during the remainder of the year. We may elect to make additional non-required contributions depending on investment performance and the pension plan status in the fourth quarter of 2013.