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Summary of Significant Accounting Policies Impact of Accounting Policy Change (Narrative) (Details) (Impact of change in accounting principle [Member], USD $) In Millions, except Per Share data, unless otherwise specified | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 | Jun. 30, 2012 | Jan. 02, 2012
Impact of change in accounting principle [Member] |  |  |  |  |
Change in Accounting Principle [Line Items] |  |  |  |  |
Change in accounting principle effect of change on basic earnings per share from continuing operations | $ 0.01 | $ (0.01) | $ 0.02 | $ (0.01) |
Change in Accounting Principle, Effect of Change on Diluted Earnings Per Share from Continuing Operations | $ 0.01 | $ (0.01) | $ 0.02 | $ (0.01) |
Change in Accounting Principle, Cumulative Effect of Change on Inventory |  |  |  |  | $ 143
Change in Accounting Principle, Cumulative Effect of Change on Equity |  |  |  |  | $ 120

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- Definition Amount of the effect of a change in accounting principle on basic earnings per share, from continuing operations. + References No definition available. + Details
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- Definition Amount of the effect of a change in accounting principle on diluted earnings per share, from continuing operations. + References No definition available. + Details
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- Definition Amount of cumulative effect of the change in accounting principle (change in inventory valuation methodology from LIFO to average cost for certain Foreign and United States locations) on inventory balances in the statement of financial position as of the beginning of the earliest period presented. + References No definition available. + Details
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- Definition Amount of cumulative effect of the change in accounting principle or new accounting pronouncement on retained earnings or other components of equity or net assets in the statement of financial position as of the beginning of the earliest period presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=6801783&loc=d3e22499-107794 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6801783&loc=d3e22580-107794 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Accounting Change -URI http://asc.fasb.org/extlink&oid=6503790 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Direct Effects of a Change in Accounting Principle -URI http://asc.fasb.org/extlink&oid=6510796 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Indirect Effects of a Change in Accounting Principle -URI http://asc.fasb.org/extlink&oid=6515603 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Change in Accounting Principle -URI http://asc.fasb.org/extlink&oid=6507316 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6801783&loc=d3e22583-107794 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Retrospective Application -URI http://asc.fasb.org/extlink&oid=6523989 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 154 -Paragraph 2, 17, 18 -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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