REVENUE AND CONTRACT ACQUISITION COSTS (Tables)

6 Months Ended

Jun. 30, 2019

Revenue from Contract with Customer [Abstract]

Revenue Disaggregated by Types and Geography

The following table presents revenue disaggregated by types and geography (in millions):

	Three Months Ended June 30,				Six Months Ended June 30,
U.S.	2019		2018		2019		2018
Instruments and accessories	$	428.6	$	360.3	$	836.0	$	697.9
Systems	232.6		172.4		393.3		296.4
Services	124.1		112.0		247.6		222.8
Total U.S. revenue	$	785.3	$	644.7	$	1,476.9	$	1,217.1
Outside of U.S. (“OUS”)
Instruments and accessories	$	149.9	$	115.8	$	294.8	$	238.5
Systems	111.2		105.0		198.0		215.5
Services	52.5		43.8		102.9		85.7
Total OUS revenue	$	313.6	$	264.6	$	595.7	$	539.7
Total
Instruments and accessories	$	578.5	$	476.1	$	1,130.8	$	936.4
Systems	343.8		277.4		591.3		511.9
Services	176.6		155.8		350.5		308.5
Total revenue	$	1,098.9	$	909.3	$	2,072.6	$	1,756.8

Summary of Contract Assets and Liabilities

The following information summarizes the Company’s contract assets and liabilities (in millions):

	As of
	June 30, 2019		December 31, 2018
Contract assets	$	20.0	$	12.4
Deferred revenue	$	338.5	$	327.3

Sales-type Lease Revenue

The following table presents revenue from our lease arrangements (in millions):

	Three Months Ended June 30,				Six Months Ended June 30,
	2019		2018		2019		2018
Sales-type lease revenue	$	15.3	$	13.3	$	19.9	$	25.3
Operating lease revenue	$	25.1	$	11.5	$	45.5	$	21.0

Sales-type Leases. Lease receivables relating to sales-type lease arrangements are presented on the Condensed Consolidated Balance Sheets as follows (in millions):

	As of
	June 30, 2019			December 31, 2018
Gross lease receivables	$	157.0		$	150.4
Unearned income	(7.3		)	(6.3		)
Allowance for credit loss	(1.0		)	(1.0		)
Net investment in sales-type leases	$	148.7		$	143.1
Reported as:
Prepaids and other current assets	$	52.5		$	51.2
Intangible and other assets, net	96.2			91.9
Total, net	$	148.7		$	143.1

Operating Lease Revenue

The following table presents revenue from our lease arrangements (in millions):

	Three Months Ended June 30,				Six Months Ended June 30,
	2019		2018		2019		2018
Sales-type lease revenue	$	15.3	$	13.3	$	19.9	$	25.3
Operating lease revenue	$	25.1	$	11.5	$	45.5	$	21.0