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Use of Estimates (Tables)
 12 Months Ended
Dec. 31, 2017
Accounting Policies [Abstract]  
Schedule of activity for accounts receivable allowance accounts
Summarized below is the activity for these allowance accounts.
 
Year ended December 31,
 
2017
 
2016
 
2015
Balance at beginning of year
$
10.1

 
$
9.1

 
$
12.9

Allowances provided
13.2

 
15.7

 
14.0

Write-offs, net of recoveries, credits issued and other
(13.1
)
 
(14.7
)
 
(17.8
)
Balance at end of year
$
10.2

 
$
10.1

 
$
9.1
Schedule of accrued expenses
Summarized in the table below are the components of accrued expenses at December 31, 2017 and 2016.
 
December 31,
 
2017
 
2016
Employee benefits
$
68.9

 
$
69.3

Unearned revenue(1)
100.1

 
117.8

Warranty
13.8

 
15.6

Other(2)
109.8

 
101.6

Total
$
292.6

 
$
304.3

___________________________________________________________________
(1) 
Unearned revenue includes billings in excess of costs and estimated earnings on uncompleted contracts accounted for under the percentage-of-completion method of revenue recognition, customer deposits and unearned amounts on service contracts.
(2) 
Other consists of various items including, among other items, accrued legal costs, interest and restructuring costs, none of which is individually material.
Schedule of product warranty accrual
The following is an analysis of our product warranty accrual for the periods presented:
 
Year ended December 31,
 
2017
 
2016
 
2015
Balance at beginning of year
$
35.8

 
$
36.3

 
$
34.5

Provisions
13.0

 
15.2

 
18.1

Usage
(15.4
)
 
(15.5
)
 
(16.0
)
Currency translation adjustment
0.5

 
(0.2
)
 
(0.3
)
Balance at end of year
33.9

 
35.8

 
36.3

Less: Current portion of warranty
13.8

 
15.6

 
17.0

Non-current portion of warranty
$
20.1

 
$
20.2

 
$
19.3

__________________________________________________________________