Goodwill and Other Intangible Assets (Details 1) - USD ($) $ in Millions	Apr. 30, 2020	Apr. 30, 2019
Finite-lived intangible assets subject to amortization:
Finite-lived intangible assets subject to amortization, Acquisition Cost	$ 5,301.6	$ 5,139.5
Accumulated Amortization, Impairment Charges And Foreign Currency Exchange Expense For Finite Lived Assets	1,802.4	1,451.1
Finite-lived intangible assets subject to amortization, Net	3,499.2	3,688.4
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Intangible Assets, Acquisition Cost	8,459.7	8,460.6
Total Other Intangible Assets Accumulated Amortization Impairment Charges Foreign Currency Exchange	2,030.7	1,741.8
Intangible Assets, Net (Excluding Goodwill)	6,429.0	6,718.8
Trademarks [Member]
Indefinite-lived intangible assets not subject to amortization:
Indefinite-lived intangible assets not subject to amortization, Acquisition Costs	3,158.1	3,321.1
Accumulated Amortization, Impairment Charges And Foreign Currency Exchange Expense For Indefinite Lived Assets	228.3	290.7
Indefinite-lived intangible assets not subject to amortization, Net	2,929.8	3,030.4
Customer and contractual relationships [Member]
Finite-lived intangible assets subject to amortization:
Finite-lived intangible assets subject to amortization, Acquisition Cost	4,471.1	4,471.1
Accumulated Amortization, Impairment Charges And Foreign Currency Exchange Expense For Finite Lived Assets	1,353.0	1,156.8
Finite-lived intangible assets subject to amortization, Net	3,118.1	3,314.3
Patents and technology [Member]
Finite-lived intangible assets subject to amortization:
Finite-lived intangible assets subject to amortization, Acquisition Cost	168.5	168.5
Accumulated Amortization, Impairment Charges And Foreign Currency Exchange Expense For Finite Lived Assets	138.4	127.4
Finite-lived intangible assets subject to amortization, Net	30.1	41.1
Trademarks [Member]
Finite-lived intangible assets subject to amortization:
Finite-lived intangible assets subject to amortization, Acquisition Cost	662.0	499.9
Accumulated Amortization, Impairment Charges And Foreign Currency Exchange Expense For Finite Lived Assets	311.0	166.9
Finite-lived intangible assets subject to amortization, Net	$ 351.0	$ 333.0