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8. Accumulated Other Comprehensive Income Accumulated Other Comprehensive Income (Tables)
 12 Months Ended
Dec. 31, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]  
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
Accumulated other comprehensive income (loss) included in our Consolidated Balance Sheets and Consolidated Statements of Changes in Stockholders' Equity 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, 2018
$
77.4

$
(22.3
)
$
4.4

$
59.5

Other comprehensive (loss) income, before reclassifications
(112.9
)
6.9

(1.4
)
(107.4
)
Amounts reclassified from Accumulated other comprehensive income
—

2.4

0.3

2.7

Income tax effects
—

(1.8
)
—

(1.8
)
Other comprehensive income (loss), net of income taxes
(112.9
)
7.5

(1.1
)
(106.5
)
Balances as of December 31, 2018
$
(35.5
)
$
(14.8
)
$
3.3

$
(47.0
)
Other comprehensive (loss) income, before reclassifications
(36.5
)
(10.0
)
4.8

(41.7
)
Amounts reclassified from Accumulated other comprehensive income
—

1.5

(0.4
)
1.1

Income tax effects
(0.4
)
1.1

(0.5
)
0.2

Other comprehensive (loss) income, net of income taxes
(36.9
)
(7.4
)
3.9

(40.4
)
Balances as of December 31, 2019
$
(72.4
)
$
(22.2
)
$
7.2

$
(87.4
)