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Pension Plans and Postretirement Benefits (Components of Benefits Expense)(Details) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
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Jun. 30, 2012
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Jun. 30, 2011
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Jun. 30, 2012
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Jun. 30, 2011
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| Defined Benefit Plan Disclosure [Line Items] | ||||
| Benefit Plan Funding | $ 76 | |||
| Expected return on plan assets | 5.00% | |||
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Postretirement Benefits [Member]
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| Defined Benefit Plan Disclosure [Line Items] | ||||
| Service cost | 8 | 8 | 16 | 15 |
| Interest cost | 8 | 8 | 15 | 15 |
| Prior service cost | 0 | 0 | 0 | (13) |
| Other | 0 | 0 | 0 | 0 |
| Total benefits expense [Postretirement Benefits] | 16 | 16 | 31 | 17 |
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Pension Benefits [Member]
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| Defined Benefit Plan Disclosure [Line Items] | ||||
| Service cost | 31 | 27 | 63 | 45 |
| Interest cost | 5 | 3 | 9 | 6 |
| Prior service cost | 0 | 0 | 0 | 0 |
| Other | (1) | 0 | (2) | 0 |
| Total benefits expense [Pension Benefits] | $ 35 | $ 30 | $ 70 | $ 51 |
| X | ||||||||||
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- Definition
The amount of the prior service cost or credit recognized in net periodic benefit cost relating to benefit changes attributable to plan participants' prior service pursuant to a plan amendment or a plan initiation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
An assumption as to the rate of return on plan assets reflecting the average rate of earnings expected on the funds invested or to be invested to provide for the benefits included in the benefit obligation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Definition
The increase in a defined benefit pension plan's projected benefit obligation or a defined benefit postretirement plan's accumulated postretirement benefit obligation due to the passage of time. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
This element may be used to encapsulate any other periodic costs associated with defined benefit plans that are not separately disclosed. No definition available.
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- Definition
The actuarial present value of benefits attributed by the pension benefit formula to services rendered by employees during the period. The portion of the expected postretirement benefit obligation attributed to employee service during the period. The service cost component is a portion of the benefit obligation and is unaffected by the funded status of the plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The amount of costs recognized during the period for non-pension postretirement benefits, such as medical, dental and life insurance. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The amount of cash or cash equivalents contributed by the entity to fund its pension plans. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The amount of pension benefit costs recognized during the period for (1) defined benefit plans and (2) defined contribution plans. For defined benefit plans, pension expense includes the following components: service cost, interest cost, expected return on plan assets, gain (loss) on plan assets, prior service cost or credit, transition asset or obligation, and gain (loss) due to settlements or curtailments. For defined contribution plans, the pension expense generally equals the firm's contribution to employees' accounts (if the firm contributes) during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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