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Asset Impairment Charges and Exit Costs (Narrative) (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended
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Mar. 31, 2013 employee
Asset Impairment Charges And Exit Costs [Abstract] |
Number of positions eliminated | 1,200
Reduction in annual pre-tax expenses as a result of organizational resutrcturing | $ 150

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- Definition The annual increase or reduction of annual pre-tax expenses as a result of organizational resturcturing. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition The number of positions eliminated during the period as a result of restructuring activities. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
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- Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
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