Acquisitions - Purchase Price Allocation Identifiable Intangible Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Business Acquisition Purchase Price Allocation Identifiable Intangible Assets [Line Items]
Operating lease expense	$ 118.2	$ 114.1
Goodwill	1,047.6	993.7	$ 960.5
Bargain purchase price gain	(11.1)	0.0	0.0
Cash paid for acquisitions, net of cash acquired	24.0	226.5	$ 765.4
2020 Acquisitions
Business Acquisition Purchase Price Allocation Identifiable Intangible Assets [Line Items]
Accounts receivable	2.7
Inventories	16.4
Other current assets	0.1
Property, plant and equipment	10.9
Operating lease expense	0.0
Goodwill	0.0
Other intangible assets	0.0
Other non-current assets	0.0
Total assets acquired	30.1
Accounts payable, trade	0.8
Long-term debt	0.0
Deferred taxes	0.0
Total liabilities assumed	1.7
Noncontrolling interest acquired	0.0
Net assets acquired	28.4
Working capital adjustment related to 2018 acquisitions paid in 2019	0.0
Working capital adjustment for 2019 acquisitions paid (recognized) in 2020	6.7
Indemnification settlement received	0.0
Bargain purchase price gain	(11.1)
Cash paid for acquisitions, net of cash acquired	24.0
2019 Acquisitions
Business Acquisition Purchase Price Allocation Identifiable Intangible Assets [Line Items]
Accounts receivable		26.1
Inventories		59.4
Other current assets		5.1
Property, plant and equipment		57.4
Operating lease expense		5.1
Goodwill	52.6	52.6
Other intangible assets		84.3
Other non-current assets		0.9
Total assets acquired		290.9
Accounts payable, trade		10.6
Long-term debt		17.2
Deferred taxes		2.9
Total liabilities assumed		54.0
Noncontrolling interest acquired		1.8
Net assets acquired		235.1
Working capital adjustment related to 2018 acquisitions paid in 2019		2.9
Working capital adjustment for 2019 acquisitions paid (recognized) in 2020		(6.7)
Indemnification settlement received		(4.8)
Bargain purchase price gain		0.0
Cash paid for acquisitions, net of cash acquired		226.5
Salaries, wages and benefits | 2020 Acquisitions
Business Acquisition Purchase Price Allocation Identifiable Intangible Assets [Line Items]
Other current liabilities	0.0
Salaries, wages and benefits | 2019 Acquisitions
Business Acquisition Purchase Price Allocation Identifiable Intangible Assets [Line Items]
Other current liabilities		6.8
Income taxes payable | 2020 Acquisitions
Business Acquisition Purchase Price Allocation Identifiable Intangible Assets [Line Items]
Other current liabilities	0.0
Income taxes payable | 2019 Acquisitions
Business Acquisition Purchase Price Allocation Identifiable Intangible Assets [Line Items]
Other current liabilities		2.1
Other current liabilities | 2020 Acquisitions
Business Acquisition Purchase Price Allocation Identifiable Intangible Assets [Line Items]
Other current liabilities	0.9
Other current liabilities | 2019 Acquisitions
Business Acquisition Purchase Price Allocation Identifiable Intangible Assets [Line Items]
Other current liabilities		7.1
Short-term debt | 2020 Acquisitions
Business Acquisition Purchase Price Allocation Identifiable Intangible Assets [Line Items]
Other current liabilities	0.0
Short-term debt | 2019 Acquisitions
Business Acquisition Purchase Price Allocation Identifiable Intangible Assets [Line Items]
Other current liabilities		0.8
Long-term operating lease liabilities | 2020 Acquisitions
Business Acquisition Purchase Price Allocation Identifiable Intangible Assets [Line Items]
Other current liabilities	0.0
Long-term operating lease liabilities | 2019 Acquisitions
Business Acquisition Purchase Price Allocation Identifiable Intangible Assets [Line Items]
Other current liabilities		4.5
Other non-current liabilities | 2020 Acquisitions
Business Acquisition Purchase Price Allocation Identifiable Intangible Assets [Line Items]
Other non-current liabilities	0.0
Other non-current liabilities | 2019 Acquisitions
Business Acquisition Purchase Price Allocation Identifiable Intangible Assets [Line Items]
Other non-current liabilities		1.1
Accrued pension cost | 2020 Acquisitions
Business Acquisition Purchase Price Allocation Identifiable Intangible Assets [Line Items]
Other non-current liabilities	0.0
Accrued pension cost | 2019 Acquisitions
Business Acquisition Purchase Price Allocation Identifiable Intangible Assets [Line Items]
Other non-current liabilities		0.8
Accrued postretirement liability | 2020 Acquisitions
Business Acquisition Purchase Price Allocation Identifiable Intangible Assets [Line Items]
Other non-current liabilities	$ 0.0
Accrued postretirement liability | 2019 Acquisitions
Business Acquisition Purchase Price Allocation Identifiable Intangible Assets [Line Items]
Other non-current liabilities		$ 0.1