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Pension and Other Postretirement Benefits (Details Textual) $ in Millions	6 Months Ended
	Jun. 30, 2015 USD ($)
Pension [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected current year contributions to benefit plans	$ 100
Contributions to benefit plans	89
Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected current year contributions to benefit plans	5
Contributions to benefit plans	$ 3

X

- Definition

The increase in the fair value of plan assets from contributions made by the employer.

+ 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 (b)(3)



-URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920

+ Details

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Period Type:	duration

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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X

- Definition

Amount of employer's best estimate of contributions expected to be paid to the plan in the current remaining fiscal period.

+ References

No definition available.

+ Details

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X

- Details

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X

- Details

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