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6. Accumulated Other Comprehensive Income 6. Accumulated Other Comprehensive Income (Tables) | 3 Months Ended
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Mar. 31, 2021
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] | Accumulated other comprehensive income included in our condensed consolidated balance sheets consists of the following components (in millions):
| Foreign currency translation adjustments | Foreign other post-employment benefits adjustments | Net unrealized holding gains on available-for-sale investments | Total accumulated other comprehensive income (loss)
Balances as of January 1, 2021: | $ | 298.6 |  | $ | (26.0) |  | $ | 9.8 |  | $ | 282.4 |
Other comprehensive (loss) income, before reclassifications | (214.7) |  | 1.7 |  | (1.9) |  | (214.9) |
Amounts reclassified from Accumulated other comprehensive income | — |  | 0.5 |  | (0.1) |  | 0.4 |
Income tax effects | 0.4 |  | (0.3) |  | 0.4 |  | 0.5 |
Other comprehensive (loss) income, net of income taxes | (214.3) |  | 1.9 |  | (1.6) |  | (214.0) |
Balances as of March 31, 2021: | $ | 84.3 |  | $ | (24.1) |  | $ | 8.2 |  | $ | 68.4 |
| Foreign currency translation adjustments | Foreign other post-employment benefits adjustments | Net unrealized holding gains on available-for-sale investments | Total accumulated other comprehensive income (loss)
Balances as of January 1, 2020: | $ | (72.4) |  | $ | (22.2) |  | $ | 7.2 |  | $ | (87.4) |
Other comprehensive (loss) income, before reclassifications | (62.9) |  | 0.2 |  | — |  | (62.7) |
Amounts reclassified from Accumulated other comprehensive income | — |  | 0.3 |  | (0.4) |  | (0.1) |
Income tax effects | 0.9 |  | 0.2 |  | 0.1 |  | 1.2 |
Other comprehensive (loss) income, net of income taxes | (62.0) |  | 0.7 |  | (0.3) |  | (61.6) |
Balances as of March 31, 2020: | $ | (134.4) |  | $ | (21.5) |  | $ | 6.9 |  | $ | (149.0) |

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6450520&loc=d3e32583-110901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=121641772&loc=SL7669686-108580 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 45 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900 + Details
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