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Credit losses Credit losses (Tables)
6 Months Ended
Jun. 30, 2020
Allowance for Credit Loss [Abstract]  
Accounts Receivable, Allowance for Credit Loss
Allowance for doubtful accounts:
(In millions)
 
 
 
December 31, 2019
$
30.2

Cumulative effect of change in accounting principle
2.3

Provision for uncollectible accounts receivable(a)
13.1

Write-offs less recoveries
(1.4
)
Foreign currency exchange effects
(0.7
)
June 30, 2020
$
43.5


(a)
The provision in 2020 includes a $10.6 million allowance related to the internal loss in our U.S global services operations. See Note 1 for details.