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Valuation and Qualifying Accounts and Reserves
 12 Months Ended
Dec. 31, 2016
Valuation and Qualifying Accounts [Abstract]  
Valuation and Qualifying Accounts and Reserves
Valuation and Qualifying Accounts and Reserves
 (amounts in millions)
 
Balance at
beginning of
period
 
Charges to
costs and
expense
 
Deductions
from
reserves and other (2)
 
Balance at
end of period
Reserves against accounts receivable (1):
 
 
 
 
 
 
 
 
2016
 
$
(14.4
)
 
$
(19.0
)
 
$
(3.3
)
 
$
(36.7
)
2015
 
(9.6
)
 
(9.2
)
 
4.4

 
(14.4
)
2014
 
(10.1
)
 
(1.2
)
 
1.7

 
(9.6
)
(1) 
Primarily consists of reserves for uncollectible accounts.
(2) 
Other activity consists primarily of currency translation effects.