Represents the after tax amount of acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.

No definition available.

Acquisitions (Details) $ / shares in Units, $ in Millions		3 Months Ended		9 Months Ended		12 Months Ended
Acquisitions (Details) $ / shares in Units, $ in Millions	Apr. 07, 2021 USD ($)	Sep. 30, 2021 USD ($) agreement	Sep. 30, 2020 USD ($)	Sep. 30, 2021 USD ($) agreement segment	Sep. 30, 2020 USD ($)	Dec. 31, 2020 USD ($) contract segment	Dec. 09, 2020 $ / shares
Acquisitions
Number of reportable business segments \| segment				2
Number of acquisitions \| agreement				6
Acquisition-related expenses		$ 0.0	$ 0.0	$ 55.4	$ 0.0
Purchase price, net of cash acquired				1,531.0	$ 50.3
Goodwill		5,839.4		5,839.4		$ 5,032.1
MTS Systems Corporation and Other 2021 Acquisitions [Member]
Acquisitions
Acquisition-related expenses				55.4
Acquisition-related expenses, net of tax				$ 44.6
MTS Systems Corporation
Acquisitions
Business Acquisition, Date of Acquisition Agreement				Dec. 09, 2020
Business acquisition, effective date	Apr. 07, 2021
Number of reportable business segments \| segment						2
Purchase price, net of cash acquired	$ 1,300.0
Acquisition price per share \| $ / shares							$ 58.50
Goodwill deductible for tax purposes		0.0		$ 0.0
Senior note assumed in business acquisition	350.0
Senior note assumed from business acquisition and repaid and settled shortly after closing, including accrued interest and make-whole premium	$ 387.3
Deferred tax liability		61.0		61.0
MTS Sensors [Member]
Acquisitions
Goodwill		720.4		720.4
Indefinite-lived intangible assets				54.0
Definite-lived intangible assets				183.4
Customer relationships \| MTS Sensors [Member]
Acquisitions
Definite-lived intangible assets				$ 128.1
Useful lives				11 years
Proprietary technology \| MTS Sensors [Member]
Acquisitions
Definite-lived intangible assets				$ 39.1
Useful lives				15 years
Backlog \| MTS Sensors [Member]
Acquisitions
Definite-lived intangible assets				$ 16.2
Useful lives				3 months
Cable Products and Solutions
Acquisitions
Number of acquisitions \| agreement				1
Goodwill		169.0		$ 169.0		$ 157.6
Interconnect Products and Assemblies
Acquisitions
Number of acquisitions				5		2
Purchase price, net of cash acquired						$ 50.0
Goodwill		$ 5,670.4		$ 5,670.4		$ 4,874.5
Number of acquisitions for which acquisition accounting has been completed \| agreement		2		2