Contract Assets and Contract Liabilities (Tables)

3 Months Ended

Mar. 31, 2018

Contract Assets and Contract Liabilities [Abstract]

Schedule Of Contract Assets and Contract Liabilities

The following table sets forth contract assets (mobilization and upgrade/modification costs) and contract liabilities (mobilization and upgrade/modification revenue) on the Condensed Consolidated Balance Sheets as of March 31, 2018 (in millions):

	Balance Sheet Classification	March 31, 2018		December 31, 2017
Contract assets
Current	Prepaid expenses and other current assets	$	3.3	$	2.8
Noncurrent	Other assets	—		—
		$	3.3	$	2.8
Contract liabilities
Current	Deferred revenue	$	4.4	$	1.1
Noncurrent	Other liabilities	0.3		0.5
		$	4.7	$	1.6

Schedule of Changes in Contract Assets

Presented in the table below are the changes in contract assets (mobilization and upgrade/modification costs) during the three months ended March 31, 2018 (in millions):

	March 31, 2018
Deferred mobilization and upgrade/modification costs
Beginning balance	$	2.8
Plus: contractual additions	3.3
Less: amortization	2.8
Ending deferred mobilization and upgrade/modification costs	$	3.3

Schedule of Changes in Contract Liabilities

Presented in the table below are the changes in contract liabilities (mobilization and upgrade/modification revenue) during the three months ended March 31, 2018 (in millions):

	March 31, 2018
Deferred mobilization and upgrade/modification revenue
Beginning balance	$	1.6
Plus: contractual additions	3.7
Less: amortization	0.6
Ending deferred mobilization and upgrade/modification revenue	$	4.7