Retirement Plans (OPEB Expected Benefit Payments) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014
OPEB, Gross Benefits [Member]
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract]
2015	$ 22,781
2016	26,472
2017	29,983
2018	33,148
2019	35,902
2020 - 2024	209,484
Total	357,770
Medicare Part D Subsidy [Member]
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract]
2015	11
2016	18
2017	32
2018	46
2019	67
2020 - 2024	904
Total	1,078
Postretirement Benefits Other Than Pensions (OPEB) [Member]
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract]
2015	22,770
2016	26,454
2017	29,951
2018	33,102
2019	35,835
2020 - 2024	208,580
Total	$ 356,692

The total amount of the aggregate benefits expected to be paid in the next ten fiscal years.

No definition available.

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- Definition

Amount of benefits from a defined benefit plan expected to be paid in the five fiscal years after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ 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 (f)

-URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920

+ Details

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- Definition

Amount of benefits from a defined benefit plan expected to be paid in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

+ Details

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- Definition

Amount of benefits from a defined benefit plan expected to be paid in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

+ Details

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- Definition

Amount of benefits from a defined benefit plan expected to be paid in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

+ Details

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- Definition

Amount of benefits from a defined benefit plan expected to be paid in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

+ Details

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- Definition

Amount of benefits from a defined benefit plan expected to be paid in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

+ Details

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