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Contract Balances (Tables)
6 Months Ended
Jun. 30, 2018
Revenue from Contract with Customer [Abstract]  
Contract Balances
Contract balances are set forth in the following table:
 
 
 
 
 
 
Balance Sheet Account
June 30, 2018
 
January 1, 2018
 
Change
Unbilled receivables - current & non-current (1)
$
180.0

 
$
149.1

 
$
30.9

Contract liabilities - current (2)
(656.8
)
 
(605.5
)
 
(51.3
)
Deferred revenue - non-current
(29.8
)
 
(31.8
)
 
2.0

Net contract assets/(liabilities)
$
(506.6
)
 
$
(488.2
)
 
$
(18.4
)
(1) Non-current unbilled receivables are reported in "Other assets" in our condensed consolidated balance sheets.
(2) Consists of "Deferred revenue", billings in-excess of revenues ("BIE") and customer deposits. BIE and customer deposits are reported in "Other accrued liabilities" in our condensed consolidated balance sheets.