Business Acquisitions and Dispositions - Narrative (Details) - USD ($)		1 Months Ended	3 Months Ended		12 Months Ended
	Feb. 02, 2018	Aug. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Feb. 28, 2018
Business Acquisition [Line Items]
Goodwill			$ 1,923,300,000	$ 1,811,800,000	$ 1,923,300,000	$ 1,811,800,000	$ 1,784,400,000
Acquisitions, net of cash acquired					239,600,000	70,800,000	1,118,000,000.0
Gain on disposition of business					$ 0	21,700,000	0
Disposal by sale | Haefely Test, AG
Business Acquisition [Line Items]
Proceeds from disposal of business		$ 38,100,000
Dispositions, tangible assets		32,300,000
Dispositions, goodwill		3,100,000
Dispositions, liabilities		12,200,000
Dispositions, translation adjustments recognized		7,700,000
Gain on disposition of business		$ 21,700,000
Term Loan Agreement | Line of Credit
Business Acquisition [Line Items]
Line of credit, maximum borrowing capacity	$ 500,000,000
Notes 2028 Term | Senior Notes
Business Acquisition [Line Items]
Senior notes, stated percentage	3.50%		3.50%		3.50%			3.50%
Face amount	$ 450,000,000							$ 450,000,000
2020 Acquisitions
Business Acquisition [Line Items]
Goodwill			$ 99,700,000		$ 99,700,000
Acquisitions, net of cash acquired					239,600,000
Deferred purchase price and net working capital settlements					2,000,000.0
Armorcast
Business Acquisition [Line Items]
Consideration transferred to acquire business			136,800,000
Intangible asset acquired			53,800,000		53,800,000
Goodwill			$ 65,100,000		65,100,000
Weighted average estimated useful life			19 years
Beckwith
Business Acquisition [Line Items]
Consideration transferred to acquire business			$ 54,300,000
Intangible asset acquired			33,200,000		33,200,000
Goodwill			$ 12,500,000		12,500,000
Weighted average estimated useful life			15 years
AccelTex
Business Acquisition [Line Items]
Consideration transferred to acquire business			$ 45,100,000
Intangible asset acquired			19,400,000		19,400,000
Goodwill			$ 21,100,000		21,100,000
Weighted average estimated useful life			15 years
Other 2020 Acquisition
Business Acquisition [Line Items]
Consideration transferred to acquire business			$ 1,600,000
Goodwill			1,000,000.0		$ 1,000,000.0
Deferred purchase price and net working capital settlements			$ 200,000
2019 Acquisitions
Business Acquisition [Line Items]
Goodwill				32,500,000		32,500,000
Deferred purchase price and net working capital settlements						1,500,000
Cantega
Business Acquisition [Line Items]
Consideration transferred to acquire business				38,400,000
Intangible asset acquired				20,400,000		20,400,000
Goodwill				$ 16,900,000		16,900,000
Weighted average estimated useful life				12 years
CPI
Business Acquisition [Line Items]
Consideration transferred to acquire business				$ 27,900,000
Intangible asset acquired				12,800,000		12,800,000
Goodwill				$ 11,000,000.0		11,000,000.0
Weighted average estimated useful life				18 years
Other 2019 Acquisition
Business Acquisition [Line Items]
Consideration transferred to acquire business				$ 5,000,000.0
Goodwill				$ 4,700,000		$ 4,700,000
Aclara
Business Acquisition [Line Items]
Consideration transferred to acquire business	1,100,000,000
Goodwill	708,700,000
Deferred purchase price and net working capital settlements							1,700,000
Deductible goodwill	$ 159,900,000
Transaction costs							12,800,000
Contributed sales							611,100,000
Contributed operating income							$ 29,600,000