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6. Accumulated Other Comprehensive Income 7. Accumulated Other Comprehensive Income (Notes) | 3 Months Ended
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Mar. 31, 2023
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] |
Stockholders' Equity Note Disclosure [Text Block] | 8. ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) 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 (losses) on available-for-sale investments | Total accumulated other comprehensive income (loss)
Balances as of January 1, 2023: | $ | (466.5) |  | $ | 10.0 |  | $ | (10.3) |  | $ | (466.8) |
Other comprehensive income, before reclassifications | 55.4 |  | 0.1 |  | 4.0 |  | 59.5 |
Amounts reclassified from Accumulated other comprehensive income (loss) | — |  | (0.1) |  | 0.2 |  | 0.1 |
Income tax effects | (0.2) |  | 0.1 |  | (1.0) |  | (1.1) |
Other comprehensive income, net of income taxes | 55.2 |  | 0.1 |  | 3.2 |  | 58.5 |
Balances as of March 31, 2023: | $ | (411.3) |  | $ | 10.1 |  | $ | (7.1) |  | $ | (408.3) |
| Foreign currency translation adjustments | Foreign other post-employment benefits adjustments | Net unrealized holding gains (losses) on available-for-sale investments | Total accumulated other comprehensive income (loss)
Balances as of January 1, 2022: | $ | (170.5) |  | $ | (10.9) |  | $ | 5.8 |  | $ | (175.6) |
Other comprehensive income (loss), before reclassifications | (128.7) |  | 0.4 |  | (5.2) |  | (133.5) |
Income tax effects | 0.1 |  | (0.1) |  | 1.2 |  | 1.2 |
Other comprehensive income (loss), net of income taxes | (128.6) |  | 0.3 |  | (4.0) |  | (132.3) |
Balances as of March 31, 2022: | $ | (299.1) |  | $ | (10.6) |  | $ | 1.8 |  | $ | (307.9) |
All amounts reclassified out of accumulated other comprehensive income were reclassified into other income, net in the condensed consolidated statements of income. The reclassification adjustments are calculated using the specific identification method.

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- Definition The entire disclosure for comprehensive income, which includes, but is not limited to, 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(19)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483586/944-220-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(21)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483621/220-10-S99-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(23)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483589/942-220-S99-1 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org//220/tableOfContent + Details
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