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Other Assets (Details 2) (USD $) In Millions, unless otherwise specified | Dec. 31, 2013 | Dec. 31, 2012
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Components of other intangible assets |  |
Gross Carrying Amount | $ 1,566 | $ 1,666
Accumulated Amortization | (749) | (673)
Net Carrying Amount | 817 | 993
Other Contracts [Member] |  |
Components of other intangible assets |  |
Gross Carrying Amount | 269 | 428
Accumulated Amortization | (89) | (147)
Net Carrying Amount | 180 | 281
Customer Relationships [Member] |  |
Components of other intangible assets |  |
Gross Carrying Amount | 1,297 | 1,238
Accumulated Amortization | (660) | (526)
Net Carrying Amount | $ 637 | $ 712

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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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