Short-Term Borrowings (Details) - USD ($) $ in Millions	Jul. 31, 2019	Jul. 31, 2018
Short-term Debt [Line Items]
Short-term borrowings	$ 2.1	$ 28.2
Line of credit
Short-term Debt [Line Items]
Available credit facilities	339.5	343.2
Short-term borrowings	59.8	84.4
Remaining borrowing capacity	279.7	258.8
United States | Line of credit
Short-term Debt [Line Items]
Available credit facilities	90.0	80.0
Short-term borrowings	2.1	0.0
Remaining borrowing capacity	$ 87.9	80.0
Weighted average interest rate at end of period	3.33%
Europe | Line of credit
Short-term Debt [Line Items]
Available credit facilities	$ 74.4	81.5
Short-term borrowings	34.7	34.7
Remaining borrowing capacity	39.7	46.8
Europe | Commercial Paper
Short-term Debt [Line Items]
Available credit facilities	111.5	117.4
Short-term borrowings	0.0	28.2
Remaining borrowing capacity	111.5	$ 89.2
Weighted average interest rate at end of period		0.26%
Rest of the World | Line of credit
Short-term Debt [Line Items]
Available credit facilities	63.6	$ 64.3
Short-term borrowings	23.0	21.5
Remaining borrowing capacity	40.6	42.8
Outstanding borrowings | Line of credit
Short-term Debt [Line Items]
Short-term borrowings	2.1	28.2
Outstanding borrowings | United States | Line of credit
Short-term Debt [Line Items]
Short-term borrowings	2.1	0.0
Outstanding borrowings | Europe | Line of credit
Short-term Debt [Line Items]
Short-term borrowings	0.0	0.0
Outstanding borrowings | Europe | Commercial Paper
Short-term Debt [Line Items]
Short-term borrowings	0.0	28.2
Outstanding borrowings | Rest of the World | Line of credit
Short-term Debt [Line Items]
Short-term borrowings	0.0	0.0
Other non-borrowing reductions | Line of credit
Short-term Debt [Line Items]
Short-term borrowings	57.7	56.2
Other non-borrowing reductions | United States | Line of credit
Short-term Debt [Line Items]
Short-term borrowings	0.0	0.0
Other non-borrowing reductions | Europe | Line of credit
Short-term Debt [Line Items]
Short-term borrowings	34.7	34.7
Other non-borrowing reductions | Europe | Commercial Paper
Short-term Debt [Line Items]
Short-term borrowings	0.0	0.0
Other non-borrowing reductions | Rest of the World | Line of credit
Short-term Debt [Line Items]
Short-term borrowings	$ 23.0	$ 21.5