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Segment Information Level 2 Segment Information (Policies) | 12 Months Ended
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Dec. 31, 2012
Segment Information [Abstract] |
Segment Reporting, Policy [Policy Text Block] | The segments' profits and losses are measured on operating profits before interest expense and interest income. Specified expenses are allocated to the segments. For many of these allocated expenses, the related assets and liabilities remain in the Corporate and Other segment.

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- Definition Disclosure of accounting policy for segment reporting. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367646&loc=d3e18780-107790 + Details
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