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Retirement Plans (Details 3) - USD ($) $ in Millions	1 Months Ended	9 Months Ended
	Mar. 17, 2016	Feb. 29, 2016	Feb. 28, 2015
Pension Plan Contributions [Line Items]
Defined Benefit Plan Contributions By Employer		$ 495	$ 495
Required U.S. Pension Plan Contribution [Member]
Pension Plan Contributions [Line Items]
Defined Benefit Plan Contributions By Employer		8	380
Voluntary U.S. Pension Plan Contribution [Member]
Pension Plan Contributions [Line Items]
Defined Benefit Plan Contributions By Employer		$ 487	$ 115
Pension Plan Contribution Subsequent Event [Member]
Pension Plan Contributions [Line Items]
Defined Benefit Plan Contributions By Employer	$ 165

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- References

No definition available.

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- 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

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