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Retirement Benefits Plans Retirement Benefits Plans - Employer Contributions to Retirement Benefits Plans (Details 9) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
United States pension plans [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans
Defined Benefit Plans, Estimated Future Employer Contributions in Next Fiscal Year	$ 59
Employer contributions to pension plans	221	$ 248	$ 196
Non-United States pension plans [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans
Defined Benefit Plans, Estimated Future Employer Contributions in Next Fiscal Year	103
Employer contributions to pension plans	109	114	145
Total contributions [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans
Defined Benefit Plans, Estimated Future Employer Contributions in Next Fiscal Year	162
Employer contributions to pension plans	$ 330	$ 362	$ 341

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

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- Definition

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+ References

No definition available.

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- Definition

Amount of employer's best estimate of contributions expected to be paid to the plan during the next fiscal year beginning after the date of the latest statement of financial position.

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

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