Deferred Revenue (Tables)

12 Months Ended

Dec. 31, 2016

Deferred Revenue.

Schedule of roll forward of the deferred revenue balance

	U.S. Government						Diversified Commercial
	EnhancedView		Value-Added		NextView
(in millions)	SLA		Services		Amortization		DAP		Other		Total
Balance, December 31, 2015	$	172.9	$	68.9	$	73.7	$	41.5	$	7.3	$	364.3
Deferred revenue acquired in Radiant acquisition		—		0.7		—		—		—		0.7
Deferred revenue on cash collections		300.0		55.1		—		76.0		66.6		497.7
Deferred revenue recognized		(337.1)		(60.6)		(15.1)		(80.3)		(66.4)		(559.5)
Balance, December 31, 2016	$	135.8	$	64.1	$	58.6	$	37.2	$	7.5	$	303.2