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Organization Restructuring Rollforward (Tables)
 3 Months Ended
Dec. 31, 2017
Restructuring Cost and Reserve [Line Items]  
Restructuring and Related Costs [Table Text Block]
Activity in accrued restructuring, reported as part of other current liabilities, is presented below.
 
Three months ended
 
December 31, 2017
 
(in millions)
Beginning balance
$
3.3

Expense
2.3

Payments
(1.4
)
Ending balance
$
4.2