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8. Accumulated Other Comprehensive Income (Notes) | 9 Months Ended
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Sep. 30, 2013
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] |
accumulated other comprehensive income [Text Block] | 8. ACCUMULATED OTHER COMPREHENSIVE INCOME Changes to Accumulated other comprehensive income components are shown in the following table:
| Foreign currency translation adjustments | Other post-employment benefits adjustments | Net unrealized holding gains on available-for-sale investments | Bio-Rad Accumulated other comprehensive income | Non-controlling interests | Total Accumulated other comprehensive income
Balance at January 1, 2013 | $ | 172.9 |  | $ | (8.1 | ) | $ | 109.7 |  | $ | 274.5 |  | $ | (0.2 | ) | $ | 274.3 |
Other comprehensive income, net of income taxes before reclassifications | 5.1 |  | — |  | 36.7 |  | 41.8 |  | — |  | 41.8 |
Amounts reclassified from Accumulated other comprehensive income | (0.2 | ) | — |  | 0.2 |  | — |  | 0.2 |  | 0.2 |
Net Other comprehensive income, net of income taxes | 4.9 |  | — |  | 36.9 |  | 41.8 |  | 0.2 |  | 42.0 |
Balance at September 30, 2013 | $ | 177.8 |  | $ | (8.1 | ) | $ | 146.6 |  | $ | 316.3 |  | $ | — |  | $ | 316.3 |
Reclassifications from Accumulated other comprehensive income for the period ended September 30, 2013 are summarized in the following table:
Details about Accumulated other comprehensive income components |  | Amount reclassified from Accumulated other comprehensive income |  | Affected line item in the statement where net income is presented
Net holding losses on available-for-sale investments |  | $ | 0.2 |  |  | Other (income) expense, net
|  | — |  |  | Income tax expense |  |
|  | $ | 0.2 |  |  | Net of income taxes |  |

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- Definition accumulated other comprehensive income [Text Block] + References No definition available. + Details
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Namespace Prefix: | bio_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration