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Derivative Instruments (Tables)
9 Months Ended
Sep. 30, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Derivative instruments
The notional amount of the Company's derivatives is summarized as follows (in millions):
 
As of
 
September 30,
2019
 
December 31,
2018
Designated derivatives:
 
 
 
Cash flow hedges
$
533.4

 
$
497.7

Interest rate swap contracts
300.0

 

Total designated derivatives
833.4

 
497.7

 
 
 
 
Non-designated derivatives
161.9

 
158.7

   Total
$
995.3

 
$
656.4