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General and Summary of Significant Accounting Policies Effect of Change in Estimate (Tables) | 12 Months Ended
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Dec. 31, 2015
Change in Accounting Estimate [Line Items] |
Schedule of Change in Accounting Estimate [Table Text Block] | The impact of the change in approach on expected service costs for the U.S. and U.K. plans in 2016 is shown below (in millions):
| Expected 2016 Service Cost |  | Expected 2016 Interest Cost
| Disaggregated rate approach |  | Aggregate rate approach |  | Impact of change |  | Disaggregated rate approach |  | Aggregate rate approach |  | Impact of change
U.S. | $ | 13 |  |  | $ | 14 |  |  | $ | (1 | ) |  | $ | 42 |  |  | $ | 51 |  |  | $ | (9 | )
U.K. | 3 |  |  | 4 |  |  | (1 | ) |  | 7 |  |  | 9 |  |  | (2 | )
Total | $ | 16 |  |  | $ | 18 |  |  | $ | (2 | ) |  | $ | 49 |  |  | $ | 60 |  |  | $ | (11 | )

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- Definition Tabular disclosure of the change in an accounting estimate, including a change that occurs in an interim period. If a change in accounting estimate affects several future periods (for example, a change in the service life of a depreciable asset) disclose the effect on income from continuing operations, net income (or other appropriate captions of changes in the applicable net assets or performance indicator), and any related per-share amounts of the current period. Disclosure of the effects of a change in an accounting estimate that occurs in the ordinary course of business (such as uncollectible accounts or inventory obsolescence) is not required, unless the effect is material. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=51655806&loc=d3e777-108305 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 45 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=6368906&loc=d3e21843-107793 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=56949863&loc=d3e22595-107794 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.10-01.(a)(5)) -URI http://asc.fasb.org/extlink&oid=27015980&loc=d3e46468-122699 + Details
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