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RECENT ACCOUNTING PRONOUNCEMENTS Adoption of ASU 2017-07 (Tables)
 9 Months Ended
Sep. 30, 2018
Accounting Standards Update 2017-07 [Member]  
Error Corrections and Prior Period Adjustments Restatement [Line Items]  
Schedule of Error Corrections and Prior Period Adjustments [Table Text Block] As a result of the adoption, our Consolidated Statement of Operations for the three and nine months ended September 30, 2017 was restated as follows:
For the Three Months Ended September 30, 2017
Previously Reported
Effect of Change
Restated
Costs of revenue
 
$
441.9

 
 
$
(0.7
)
 
 
$
441.2

 
General and administrative expenses(a)
 
74.6

 
 
(4.5
)
 
 
70.1

 
Research and development expenses
 
23.1

 
 
(0.1
)
 
 
23.0

 
Operating income
 
127.8

 
 
5.3

 
 
133.1

 
Interest and non-operating expenses, net
 
0.2

 
 
5.3

 
 
5.5

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
For the Nine Months Ended September 30, 2017
Previously Reported
Effect of Change
Restated
Costs of revenue
 
$
1,291.9

 
 
$
(2.1
)
 
 
$
1,289.8

 
General and administrative expenses(a)
 
206.1

 
 
(5.7
)
 
 
200.4

 
Sales and marketing expenses
 
128.3

 
 
(0.1
)
 
 
128.2

 
Research and development expenses
 
68.2

 
 
(0.2
)
 
 
68.0

 
Operating income
 
241.1

 
 
8.1

 
 
249.2

 
Interest and non-operating expenses, net
 
0.1

 
 
8.1

 
 
8.2