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8. Accumulated Other Comprehensive Income Reclassification out of Accumulated Other Comprehensive Income (Tables)	12 Months Ended
	Dec. 31, 2020
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassification out of Accumulated Other Comprehensive Income [Table Text Block]	All amounts reclassified out of accumulated other comprehensive income were reclassified into other income, net in the consolidated statements of income. Reclassification adjustments are calculated using the specific identification method.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

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- Definition

Tabular disclosure of information about items reclassified out of accumulated other comprehensive income (loss).

+ References

No definition available.

+ Details

Name:	us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration