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Commitments and Contingent Liabilities (Guarantees) (Details) (USD $) In Millions, unless otherwise specified |  |  |  |  | 3 Months Ended |
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Jun. 30, 2013 | Dec. 31, 2012 | Jun. 30, 2013 Indemnification Agreements [Member] | Dec. 31, 2012 Indemnification Agreements [Member] | Jun. 30, 2013 Customer and Supplier Guarantee [Member] | Jun. 30, 2013 Customer and Supplier Guarantee, Bank Borrowings [Member] Y | Jun. 30, 2013 Customer and Supplier Guarantee, Equipment and Facility Leases [Member] Y | Jun. 30, 2013 Equity Affiliates, Bank Borrowings [Member] Y | Jun. 30, 2013 Guaranteed Obligations, Short-Term [Member] | Jun. 30, 2013 Guaranteed Obligations, Short-Term [Member] Customer and Supplier Guarantee, Bank Borrowings [Member] | Jun. 30, 2013 Guaranteed Obligations, Short-Term [Member] Customer and Supplier Guarantee, Equipment and Facility Leases [Member] | Jun. 30, 2013 Guaranteed Obligations, Short-Term [Member] Equity Affiliates, Bank Borrowings [Member] | Jun. 30, 2013 Guaranteed Obligations, Long-Term [Member] | Jun. 30, 2013 Guaranteed Obligations, Long-Term [Member] Customer and Supplier Guarantee, Bank Borrowings [Member] | Jun. 30, 2013 Guaranteed Obligations, Long-Term [Member] Customer and Supplier Guarantee, Equipment and Facility Leases [Member] | Jun. 30, 2013 Guaranteed Obligations, Long-Term [Member] Equity Affiliates, Bank Borrowings [Member]
Guarantor Obligations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Indemnifications, carrying amount |  |  | $ 34 | $ 31 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Guarantee obligations | $ 499 | $ 535 |  |  | $ 316 | [1] | $ 315 | [1] | $ 1 | [1] | $ 183 | [2] | $ 356 | $ 174 | [1] | $ 0 | [1] | $ 182 | [2] | $ 143 | $ 141 | [1] | $ 1 | [1] | $ 1 | [2]
Collateral assets and personal guarantees percentage |  |  |  |  | 48.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Guaranteed obligations, maximum term |  |  |  |  |  |  | 8 |  | 4 |  | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
[1] | Existing guarantees for customers and suppliers arose as part of contractual agreements.
[2] | Existing guarantees for equity affiliates arose for liquidity needs in normal operations.

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- Definition Guaranteed Obligations Maximum Term, Years + References No definition available. + Details
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- Definition The current carrying amount of the liability for the freestanding or embedded guarantor's obligations under the guarantee or each group of similar guarantees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 5 -Paragraph 9 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12069-110248 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 45 -Paragraph 13 -Subparagraph c -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition Indicates, if estimable, (as a percentage) the approximate extent to which the proceeds from liquidation of any assets held either as collateral or by third parties would be expected to cover the maximum potential amount of future payments under the guarantee or each group of similar guarantees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 45 -Paragraph 13 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12069-110248 + Details
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- Definition Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 45 -Paragraph 13 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12069-110248 + Details
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