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Contract Assets and Liabilities (Tables)
 3 Months Ended
Mar. 31, 2019
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, 2018
$
966.5

$
44.3

$
77.6

March 31, 2019
1,202.1

39.0

76.7

Increase/(decrease)
$
235.6

$
(5.3
)
$
(0.9
)