The interest rate used to adjust for the time value of money for the plan.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (k)(1)

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

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- Definition

The interest rate used to adjust for the time value of money.

+ References

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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=35743120&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

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=35743120&loc=d3e1928-114920

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Pensions and Postretirement Benefits Other Than Pensions (Schedule of Defined Benefit Plan Weighted Average Discount Rate Assumptions) (Details) (Postretirement [Member])	1 Months Ended						10 Months Ended			12 Months Ended
	Dec. 31, 2014	Jan. 31, 2014	Dec. 31, 2013	Jan. 31, 2013	Dec. 31, 2012	Jan. 31, 2012	Nov. 30, 2014	Nov. 30, 2013	Nov. 30, 2012	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Benefit obligations at December 31	3.50%				3.25%					3.50%		3.25%	4.00%
Net periodic benefit cost	4.25%	4.25%	4.00%	3.25%	3.75%	4.00%	4.25%	3.25%	3.75%
Year that the rate reaches the ultimate trend rate	2021		2021		2021					2021	2021	2021
current year medical inflation [Member]
Ultimate inflation rate										7.25%	7.65%	8.05%
ultimate inflation rate [Member]
Ultimate inflation rate										5.00%	5.00%	5.00%
Prior to 2012 plan amendment [Member]
Benefit obligations at December 31			4.25%								4.25%