Income Taxes - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Contingency [Line Items]
Net deferred tax liabilities		$ 74.7
Net deferred tax assets	$ 24.9
Decrease in valuation allowance	51.3
Decrease in deferred tax liability	100.2
Employee service share-based compensation, tax benefit from exercise of stock options	7.2	6.7	$ 4.2
Excess tax benefit from share-based compensation, operating activities	4.6	4.8	2.3
Net operating loss carryforwards	35.5
Operating loss carryforwards, valuation allowances	29.1
Gross unrecognized tax benefits	6.6	5.7	7.1	$ 9.1
Recognized potential interest and penalties	0.6	(0.1)	$ 0.0
Unrecognized tax benefits that would impact effective tax rate	9.2
Estimated reduction in unrecognized tax benefits within twelve months	2.7
Continuing operations
Income Tax Contingency [Line Items]
Gross unrecognized tax benefits	6.6	5.7
Unrecognized tax benefits, net of offsetting indirect tax benefits	9.2	7.6
Potential interest and penalties	2.6	1.9
Danaher | United States
Income Tax Contingency [Line Items]
Net deferred tax liabilities	15.1	133.0
Danaher | Foreign tax
Income Tax Contingency [Line Items]
Net deferred tax assets	$ 40.0	$ 58.5