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Revenue - Revenue Disaggregated by Types and Geography (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disaggregation of Revenue [Line Items]
Total revenue	$ 1,329.1	$ 1,077.7	$ 852.1	$ 1,099.5	$ 1,277.7	$ 1,128.2	$ 1,098.9	$ 973.7	$ 4,358.4	$ 4,478.5	$ 3,724.2
Instruments and accessories
Disaggregation of Revenue [Line Items]
Total revenue									2,455.7	2,408.2	1,962.0
Systems
Disaggregation of Revenue [Line Items]
Total revenue									1,178.9	1,346.1	1,127.1
Services
Disaggregation of Revenue [Line Items]
Total revenue									723.8	724.2	635.1
U.S.
Disaggregation of Revenue [Line Items]
Total revenue									2,962.7	3,129.5	2,633.5
U.S. | Instruments and accessories
Disaggregation of Revenue [Line Items]
Total revenue									1,785.1	1,790.4	1,485.2
U.S. | Systems
Disaggregation of Revenue [Line Items]
Total revenue									695.0	830.7	692.2
U.S. | Services
Disaggregation of Revenue [Line Items]
Total revenue									482.6	508.4	456.1
Outside of U.S. (“OUS”)
Disaggregation of Revenue [Line Items]
Total revenue									1,395.7	1,349.0	1,090.7
Outside of U.S. (“OUS”) | Instruments and accessories
Disaggregation of Revenue [Line Items]
Total revenue									670.6	617.8	476.8
Outside of U.S. (“OUS”) | Systems
Disaggregation of Revenue [Line Items]
Total revenue									483.9	515.4	434.9
Outside of U.S. (“OUS”) | Services
Disaggregation of Revenue [Line Items]
Total revenue									$ 241.2	$ 215.8	$ 179.0

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No definition available.

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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045

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