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Summary of Significant Accounting Policies (Details) (USD $) | 3 Months Ended | 6 Months Ended | 12 Months Ended | 1 Months Ended | 6 Months Ended
--- | --- | --- | --- | --- | ---
Dec. 31, 2011 | Dec. 31, 2012 | Dec. 31, 2011 | Jun. 30, 2012 | Jun. 30, 2011 | Jun. 30, 2010 | Dec. 31, 2011 Noncontrolling Interests [Member] | Dec. 31, 2012 Building [Member] Minimum [Member] | Dec. 31, 2012 Building [Member] Maximum [Member] | Dec. 31, 2012 Machinery And Equipment [Member] Minimum [Member] | Dec. 31, 2012 Machinery And Equipment [Member] Maximum [Member]
Principles of Consolidation |  |  |  |  |  |  |  |  |  |  |
Difference in financial statement date of certain subsidiaries and affiliates included in Company's results (in days) |  | 93 days |  |  |  |  |  |  |  |  |
Reporting period lag eliminated in the reporting of one consolidated subsidiary | 1 month |  |  |  |  |  |  |  |  |  |
Noncontrolling interests previously associated with mandatorily redeemable instruments |  |  |  | $ 184,000,000 |  |  | $ 174,000,000 |  |  |  |
Use of Estimates |  |  |  |  |  |  |  |  |  |  |
Effect of change in accounting estimate on after-tax earnings |  |  |  |  | 83,000,000 |  |  |  |  |  |
Effect of change in accounting estimate on diluted earnings per share (in dollars per share) |  |  |  |  | $ 0.13 |  |  |  |  |  |
Receivables |  |  |  |  |  |  |  |  |  |  |
Allowance for estimated uncollectible trade accounts receivable |  | 87,000,000 |  | 92,000,000 | 100,000,000 |  |  |  |  |  |
Trade accounts receivable due from unconsolidated affiliates |  | 566,000,000 |  | 266,000,000 | 367,000,000 |  |  |  |  |  |
Property, Plant, and Equipment |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment, Useful Life |  |  |  |  |  |  |  | 10 years | 40 years | 3 years | 30 years
Capitalized interest on major construction projects |  | 12,000,000 | 9,000,000 | 21,000,000 | 7,000,000 | 75,000,000 |  |  |  |  |
Asset Abandonments and Write-Downs |  |  |  |  |  |  |  |  |  |  |
Impairment of long lived assets |  | 0 | 337,000,000 | 367,000,000 | 2,000,000 | 9,000,000 |  |  |  |  |
Net Sales |  |  |  |  |  |  |  |  |  |  |
Net sales to unconsolidated affiliates |  | 4,000,000,000 | 4,500,000,000 | 7,700,000,000 | 7,100,000,000 | 7,100,000,000 |  |  |  |  |
Research and Development |  |  |  |  |  |  |  |  |  |  |
Research and development expenses, net of expenditures subsequently reimbursed by government grants |  | $ 28,000,000 | $ 29,000,000 | $ 56,000,000 | $ 60,000,000 | $ 56,000,000 |  |  |  |  |

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