Income Taxes - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income Tax Contingency [Line Items]
Net deferred tax assets	$ 86.2	$ 86.4
Increase in valuation allowance	13.8
Total income taxes paid	79.8	32.9	$ 98.6
Employee service share-based compensation, tax benefit from exercise of stock options	2.5	1.6	3.6
Income tax (expense) benefit, share-based excess tax benefit	0.1	0.1	1.5
Net operating loss carryforwards	34.2
Operating loss carryforwards, valuation allowances	29.7
Gross unrecognized tax benefits	2.2	3.6	5.1	$ 6.6
Recognized potential interest and penalties	(0.9)	(0.5)	$ (0.4)
Unrecognized tax benefits that would impact effective tax rate	3.1
Continuing operations
Income Tax Contingency [Line Items]
Gross unrecognized tax benefits	2.2	3.6
Unrecognized tax benefits, net of offsetting indirect tax benefits	3.1	5.3
Potential interest and penalties	0.9	1.7
Danaher | United States
Income Tax Contingency [Line Items]
Net deferred tax assets	46.6	33.3
Danaher | Foreign tax
Income Tax Contingency [Line Items]
Net deferred tax assets	$ 39.6	$ 53.1