Financing Arrangements - Long-term Debt (Details) € in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2018 EUR (€)	Sep. 30, 2018
Debt Instrument [Line Items]
Operating Leases, Future Minimum Payments Due, Next Twelve Months	$ 36.1
Operating Leases, Rent Expense, Net	35.7	$ 35.2	$ 30.0
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	9.4
Long-term Debt	1,648.0	856.9
Long-term Debt, Current Maturities	9.4	2.7
Long-term debt
Long-term debt	$ 1,638.6	854.2
Debt Instrument, Interest Rate, Stated Percentage	2.02%			2.02%
Long-term Debt, Maturities, Repayments of Principal in Year Two	$ 152.5
Long-term Debt, Maturities, Repayments of Principal in Year Three	77.7
Long-term Debt, Maturities, Repayments of Principal in Year Four	0.5
Long-term Debt, Maturities, Repayments of Principal in Year Five	338.4
Long-term Debt, Maturities, Repayments of Principal after Year Five	1,069.5
Operating Leases, Future Minimum Payments, Due in Two Years	27.1
Operating Leases, Future Minimum Payments, Due in Three Years	16.9
Operating Leases, Future Minimum Payments, Due in Four Years	11.1
Operating Leases, Future Minimum Payments, Due in Five Years	6.1
Operating Leases, Future Minimum Payments, Due Thereafter	$ 17.5
Senior Unsecured Notes - 3.875% [Member]
Long-term debt
Debt Instrument, Interest Rate, Stated Percentage	3.875%			3.875%
Senior Unsecured Notes - Variable Rate [Member]
Debt Instrument [Line Items]
Long-term Debt	$ 43.9
Euro Senior Unsecured Notes - 2.02% [Member]
Long-term debt
Debt Instrument, Interest Rate, Stated Percentage	2.02%			2.02%
Senior Unsecured Notes - 4.5% [Member]
Debt Instrument [Line Items]
Long-term Debt	$ 395.8	0.0
Long-term debt
Debt Instrument, Interest Rate, Stated Percentage	4.50%			4.50%	4.50%
Term Loan - Variable Rate [Member]
Debt Instrument [Line Items]
Long-term Debt	$ 347.1	0.0
Line of Credit Accounts Receivable Securitization [Member]
Debt Instrument [Line Items]
Long-term Debt	75.0	0.0
Euro Term Loan - Variable Rate [Member]
Debt Instrument [Line Items]
Long-term Debt	107.1	119.7		€ 93.5
Other Long Term Debt [Member]
Debt Instrument [Line Items]
Long-term Debt	5.4	4.5
Series A Medium Term Note [Member]
Debt Instrument [Line Items]
Long-term Debt	154.6	154.5
Senior Unsecured Notes - Variable Rate [Member]
Debt Instrument [Line Items]
Long-term Debt	43.9	52.0
Euro Senior Unsecured Notes - 2.02% [Member]
Debt Instrument [Line Items]
Long-term Debt	171.4	179.3
Senior Unsecured Notes - 3.875% [Member]
Debt Instrument [Line Items]
Long-term Debt	$ 347.7	$ 346.9
UNITED STATES | Senior Unsecured Notes - Variable Rate [Member]
Long-term debt
Debt Instrument, Interest Rate, Stated Percentage	3.40%	2.40%		3.40%
Europe [Member] | Senior Unsecured Notes - Variable Rate [Member]
Long-term debt
Debt Instrument, Interest Rate, Stated Percentage	1.10%	1.10%		1.10%