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Accumulated Other Comprehensive Loss (Tables)
 6 Months Ended
Jul. 31, 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 July 31, 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
(12.8
)
 
0.1

 
(0.1
)
 
39.4

 
26.6

Pre-tax (gains) losses reclassified from accumulated other comprehensive loss
(1.6
)
 
—

 
(0.1
)
 
0.1

 
(1.6
)
Tax effects
1.4

 
0.1

 
—

 
(0.9
)
 
0.6

Net current period other comprehensive (loss) income
(13.0
)
 
0.2

 
(0.2
)
 
38.6

 
25.6

Balances, July 31, 2017
$
1.6

 
$
1.7

 
$
(34.0
)
 
$
(122.2
)
 
$
(152.9
)