Employee Benefit Plans (Schedule Of Assumed Health Care Cost Trend) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2011
Employee Benefit Plans [Abstract]
Effect on postretirement benefit obligation, One-Percentage-Point Increase	$ 95
Effect on postretirement benefit obligation, One-Percentage-Point Decrease	(98)
Effect on service and interest cost, One-Percentage-Point Increase	7
Effect on service and interest cost, One-Percentage-Point Decrease	$ (8)
Assumed health care cost trend rate	8.00%
Ultimate trend rate	5.00%
Year of ultimate trend rate	2018
Assumed return	5.50%
10 year actual rate of return	7.60%
Number of Aa-grade non-callable bonds used to develop the yield curve for rate used	530

Defined Benefit Plan Assumed Return On Plan Asset Percentage

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- Definition

Defined Benefit Plan Health Care Cost Trend Rate Assumed For Current Fiscal Year

+ References

No definition available.

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- Definition

Defined Benefit Plan Number Of Aa Grade Non Callable Bonds Used To Develop Yield Curve For Rate Used

+ References

No definition available.

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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 87

-Paragraph 264

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-Publisher FASB

-Name Accounting Standards Codification

-Glossary Expected Long-Term Rate of Return on Plan Assets

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-Topic 715

-SubTopic 30

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- Definition

The effect of a one-percentage-point decrease in the assumed health care cost trend rates on the accumulated postretirement benefit obligation for health care benefits.

+ References

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- Definition

The effect of a one-percentage- point decrease in the assumed health care cost trend rates on the aggregate of the service and interest cost components of net periodic postretirement health care benefit costs.

+ References

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- Definition

The effect of a one-percentage-point increase in the assumed health care cost trend rates on the accumulated postretirement benefit obligation for health care benefits.

+ References

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- Definition

The effect of a one-percentage-point increase in the assumed health care cost trend rates on the aggregate of the service and interest cost components of net periodic postretirement health care benefit costs.

+ References

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- Definition

The ultimate trend rate for health care costs.

+ References

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-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 5

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- Definition

The year when the ultimate health care cost trend rate is expected to be reached.

+ References

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