The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Goodwill and Other Intangible Assets, Amortization (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Intangible assets
Amortization expense	$ 86.4	$ 49.6	$ 67.3
Amortization expense estimated for each of the next five fiscal years
2022	67.5
2023	64.7
2024	59.1
2025	49.7
2026	48.0
Backlog
Intangible assets
Amortization expense			$ 15.7
Halo Technology Ltd [Member] \| Backlog
Intangible assets
Amortization expense	9.0
MTS Sensors [Member] \| Backlog
Intangible assets
Amortization expense	$ 16.2