Revenue recognition (Tables)

6 Months Ended

Jun. 30, 2020

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

The Company's revenues disaggregated by the major sources were as follows:

	Three Months Ended June 30, 2020						Three Months Ended June 30, 2019
	U.S. Government		Non-U.S. Government		Total		U.S. Government		Non-U.S. Government		Total
Product sales, net	$	224.2	$	74.3	$	298.5	$	94.6	$	88.9	$	183.5
Contract development and manufacturing services	44.6		28.0		72.6		—		18.7		18.7
Contracts and grants	20.7		2.9		23.6		38.3		2.7		41.0
Total revenues	$	289.5	$	105.2	$	394.7	$	132.9	$	110.3	$	243.2
	Six Months Ended June 30, 2020						Six Months Ended June 30, 2019
	U.S. Government		Non-U.S. Government		Total		U.S. Government		Non-U.S. Government		Total
Product sales, net	$	288.1	$	158.6	$	446.7	$	167.9	$	168.6	$	336.5
Contract development and manufacturing services	44.6		49.7		94.3		—		34.6		34.6
Contracts and grants	42.7		3.5		46.2		58.7		4.1		62.8
Total revenues	$	375.4	$	211.8	$	587.2	$	226.6	$	207.3	$	433.9

Rollforward of Contract Liabilities

The following table presents the rollforward of the contract liability balances:

December 31, 2019	$	88.9
Deferral of revenue	56.3
Revenue recognized	(27.2		)
June 30, 2020	$	118.0

Schedule of Accounts Receivable, Net

Accounts receivable, including unbilled accounts receivable contract assets, consist of the following:

	June 30, 2020		December 31, 2019
Billed, net	$	202.2	$	227.3
Unbilled	56.4		43.4
Total, net	$	258.6	$	270.7