Costs Associated with Rationalization Programs (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Restructuring Cost and Reserve [Line Items]
Beginning Balance	$ 237us-gaap_RestructuringReserve	$ 252us-gaap_RestructuringReserve	$ 184us-gaap_RestructuringReserve
New Charges	128	75	178
Restructuring reserve settled with cash and non cash considerations	(235)	(73)	(107)
Restructuring Reserve, Accrual Adjustment	(11)	(17)	(3)
Ending Balance	119us-gaap_RestructuringReserve	237us-gaap_RestructuringReserve	252us-gaap_RestructuringReserve
Associate Related Costs
Restructuring Cost and Reserve [Line Items]
Beginning Balance	232	229	166
New Charges	76	58	142
Restructuring reserve settled with cash and non cash considerations	(186)	(42)	(77)
Restructuring Reserve, Translation Adjustment	(18)	7	3
Restructuring Reserve, Accrual Adjustment	(5)	(13)	(2)
Ending Balance	117	232	229
Other Exit Costs And Noncancelable Lease Costs
Restructuring Cost and Reserve [Line Items]
Beginning Balance	5	23	18
New Charges	52	17	36
Restructuring reserve settled with cash and non cash considerations	(49)	(31)	(30)
Restructuring Reserve, Translation Adjustment	0	0	0
Restructuring Reserve, Accrual Adjustment	(6)	(4)	(1)
Ending Balance	$ 2	$ 5	$ 23

Restructuring reserve settled with cash and non cash considerations

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- Definition

Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 420

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SAB TOPIC 5.P.4(b))

-URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 5

-Section P

-Subsection 3, 4

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- Definition

Amount of any reversal and other adjustment made during the period to the amount of a previously accrued liability for a specified type of restructuring cost, excluding adjustments for costs incurred during the period, costs settled during the period, and foreign currency translation adjustments.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 420

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 420

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SAB TOPIC 5.P.4(b))

-URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 5

-Section P

-Subsection 3, 4

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 420

-SubTopic 10

-Section 40

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6394291&loc=d3e17658-110867

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- Definition

Net total Increase or Decrease in the accrual for restructuring costs during the reporting period.

+ References

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- Definition

Amount of foreign currency translation adjustment increasing or decreasing the accrual for a specified type of restructuring cost.

+ References

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

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 5

-Section P

-Subsection 3, 4

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 420

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SAB TOPIC 5.P.4(b)(2))

-URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 420

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (b)(2)

-URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869

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