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Revenue from Contracts with Customers Contract Assets and Liabilities (Tables)
9 Months Ended
Sep. 30, 2018
Contract with Customer, Asset and Liability [Abstract]  
Contract with Customer, Asset and Liability [Table Text Block]
Contract Assets and Liabilities

The following table summarizes our beginning and ending balances for accounts receivable and contract liabilities associated with our contracts with customers:

 
 
 
 
 
Accounts Receivable, Net
Contract Liabilities (Current)
Contract Liabilities (Long-term)
December 31, 2017
$
1,035.9

$
34.1

$
78.8

September 30, 2018
1,271.8

44.9

79.6

Increase/(decrease)
$
235.9

$
10.8

$
0.8