Pension, Postretirement Health Care and Life Insurance Benefit Plans (Health Care Cost Trend Rate) (Details)	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Health care cost trend rate [Abstract]
Pre-65 health care cost trend rate	8.00%	7.50%	8.00%
Post-65 health care cost trend rate	6.25%	7.50%	8.00%
Ultimate trend rate	4.50%	4.50%	4.50%
Year that the rate reaches the ultimate trend rate	2022	2020	2020

The post-65 health care cost trend rate used to measure the expected cost of benefits covered by the plan (gross eligible charges). This is based upon the annual rate of change in the cost of health care benefits currently provided by the postretirement benefit plan, due to factors other than changes in the composition of the plan population by age and dependency status.

No definition available.

+ Details

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- Definition

The pre-65 health care cost trend rate used to measure the expected cost of benefits covered by the plan (gross eligible charges). This is based upon the annual rate of change in the cost of health care benefits currently provided by the postretirement benefit plan, due to factors other than changes in the composition of the plan population by age and dependency status.

+ References

No definition available.

+ Details

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- Details

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- Definition

The ultimate trend rate for health care costs.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (l)

-URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920

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- Definition

Year the ultimate health care cost trend rate is expected to be reached, in CCYY format.

+ References

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