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13. Restructuring Costs (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended	7 Months Ended	13 Months Ended	19 Months Ended	38 Months Ended
13. Restructuring Costs (Details) - USD ($) $ in Millions	Jun. 30, 2019	Jun. 30, 2019	Jun. 30, 2019	Jun. 30, 2019	Jun. 30, 2019	Jun. 30, 2019	Dec. 31, 2018
European Reorganization [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges						$ 12.7
Restructuring Reserve, Accrual Adjustment	$ 0.1	$ (0.1)
European Reorganization [Member] \| Cost of Goods and Service Benchmark [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Accrual Adjustment		(0.1)
European Reorganization [Member] \| Accounts Payable and Accrued Liabilities [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Current	0.7	0.7	$ 0.7	$ 0.7	$ 0.7	0.7
Termination of a Diagnostics Research and Development Project [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges					21.4
Restructuring Reserve, Accrual Adjustment	0.1	(0.1)
Termination of a Diagnostics Research and Development Project and a Facility Closure [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	5.8	5.8	5.8	5.8	5.8	5.8	$ 11.5
Restructuring Reserve, Accrual Adjustment		(0.3)
Payments for Restructuring		(5.3)
Restructuring Reserve, Foreign Currency Translation (Gain) Loss		(0.1)
Termination of a Diagnostics Research and Development Project and a Facility Closure [Member] \| Cost of Goods and Service Benchmark [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Accrual Adjustment	(0.1)	(0.2)
Termination of a Diagnostics Research and Development Project and a Facility Closure [Member] \| Research and Development Expense [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Accrual Adjustment	(0.1)	(0.1)
Termination of a Diagnostics Research and Development Project and a Facility Closure [Member] \| Accounts Payable and Accrued Liabilities [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Current	3.0	3.0	3.0	3.0	3.0	3.0
Termination of a Diagnostics Research and Development Project and a Facility Closure [Member] \| Other Current Liabilities [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Current	0.2	0.2	0.2	0.2	0.2	0.2
Termination of a Diagnostics Research and Development Project and a Facility Closure [Member] \| Other Noncurrent Liabilities [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Noncurrent	2.6	2.6	2.6	2.6	$ 2.6	$ 2.6
GERMANY \| Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges				$ 1.4
Restructuring Reserve, Accrual Adjustment	(0.2)	(0.3)
FRANCE \| Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges			$ 4.1
Restructuring Reserve, Accrual Adjustment	$ 0.1	$ (0.1)