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Accumulated Other Comprehensive Loss (Tables)
 12 Months Ended
Dec. 31, 2017
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]  
Schedule of components of accumulated other comprehensive loss, net of tax
The components of accumulated other comprehensive loss, net of tax, were as follows:
December 31
2017

2016

Foreign currency translation
$
(87.7
)
$
(289.1
)
Translation (loss) gain on net investment hedge, net of income taxes of $(23.1) and $11.2, respectively
(39.9
)
24.8

Translation loss on long-term intercompany loans
(128.8
)
(133.7
)
Unrealized gain on investments, net of income taxes of $3.4 and $4.2, respectively
15.3

18.6

Defined benefit pension plans, net of income taxes of $(27.8) for both 2017 and 2016
(50.5
)
(50.4
)
Retiree health care plan, net of income taxes of $2.0 and $2.1, respectively
3.4

3.7

Accumulated other comprehensive loss
$
(288.2
)
$
(426.1
)