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13. Restructuring Costs (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended	10 Months Ended	16 Months Ended	22 Months Ended	41 Months Ended
13. Restructuring Costs (Details) - USD ($) $ in Millions	Sep. 30, 2019	Sep. 30, 2019	Sep. 30, 2019	Sep. 30, 2019	Sep. 30, 2019	Sep. 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	3.5	3.5	3.5	3.5	3.5	3.5	$ 11.5
Restructuring Reserve, Accrual Adjustment		(0.3)
Payments for Restructuring		(7.4)
Restructuring Reserve, Foreign Currency Translation (Gain) Loss		(0.3)
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	0.0	(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	0.0	(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	1.4	1.4	1.4	1.4	1.4	1.4
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	1.9	1.9	1.9	1.9	$ 1.9	$ 1.9
GERMANY \| Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges				$ 1.4
Restructuring Reserve, Accrual Adjustment	0.0	(0.3)
FRANCE \| Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges			$ 4.1
Restructuring Reserve, Accrual Adjustment	$ 0.0	$ (0.1)