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Accumulated Other Comprehensive Loss (Tables)
 3 Months Ended
Apr. 30, 2017
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]  
Schedule of Accumulated Other Comprehensive Loss Accumulated other comprehensive loss, net of taxes, consisted of the following at April 30, 2017:

 
Net Unrealized Gains (Losses) on Derivative Instruments
 
Net Unrealized Gains (Losses) on Available-for-Sale Securities
 
Defined Benefit Pension Components
 
Foreign Currency Translation Adjustments
 
Total
Balances, January 31, 2017
$
14.6

 
$
1.5

 
$
(33.8
)
 
$
(160.8
)
 
$
(178.5
)
Other comprehensive (loss) income before reclassifications
(2.6
)
 
1.0

 
(0.1
)
 
13.7

 
12.0

Pre-tax (gains) losses reclassified from accumulated other comprehensive loss
0.7

 
—

 
(0.4
)
 
—

 
0.3

Tax effects
0.5

 
(0.3
)
 
—

 
(0.3
)
 
(0.1
)
Net current period other comprehensive (loss) income
(1.4
)
 
0.7

 
(0.5
)
 
13.4

 
12.2

Balances, April 30, 2017
$
13.2

 
$
2.2

 
$
(34.3
)
 
$
(147.4
)
 
$
(166.3
)