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Accumulated Other Comprehensive Loss (Tables)
 9 Months Ended
Oct. 31, 2018
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]  
Schedule of Accumulated other comprehensive loss, net of taxes Accumulated other comprehensive loss, net of taxes, consisted of the following at October 31, 2018:

 
Net Unrealized Gains (Losses) on Derivative Instruments
 
Net Unrealized Gains (Losses) on Available-for-Sale Debt Securities
 
Defined Benefit Pension Components
 
Foreign Currency Translation Adjustments
 
Total
Balances, January 31, 2018
$
(16.6
)
 
$
1.3

 
$
(29.3
)
 
$
(79.2
)
 
$
(123.8
)
Other comprehensive income (loss) before reclassifications
23.0

 
1.8

 
14.1

 
(76.6
)
 
(37.7
)
Pre-tax losses reclassified from accumulated other comprehensive loss
9.0

 
—

 
0.3

 
—

 
9.3

Tax effects
(2.9
)
 
(0.1
)
 
(2.8
)
 
0.5

 
(5.3
)
Net current period other comprehensive income (loss)
29.1

 
1.7

 
11.6

 
(76.1
)
 
(33.7
)
Balances, October 31, 2018
$
12.5

 
$
3.0

 
$
(17.7
)
 
$
(155.3
)
 
$
(157.5
)