Debt and Financing Arrangements - Narrative (Details) $ in Millions		12 Months Ended
		Apr. 30, 2025 USD ($) Bank		Apr. 30, 2024 USD ($)		Apr. 30, 2023 USD ($)	Apr. 30, 2020 USD ($)	Nov. 07, 2023 USD ($)
Debt and Financing Arrangements (Textual) [Abstract]
Repayment of long-term debt		$ 1,300.0		$ 1,791.0		$ 0.0
Other debt gains (charges) – net	[1]	30.2	[2]	(19.5)	[2]	0.0
Debt instrument face amount		7,103.2		7,850.0
Capitalized debt issuance costs		3.0		32.1		0.0
Gain (Loss) on Extinguishment of Debt		$ 30.3
Percentage of the principal amount thereof which company can prepay		100.00%
Number of banks | Bank		10
Short-term borrowings		$ 640.8		591.0
Interest paid		410.6		170.7		$ 153.1
Debt Instrument, Repurchased Face Amount		300.0
Debt Instrument, Repurchase Amount		335.9
Debt Reacquisition Price		300.0
Fees Paid to Execute Debt Extinguishment		1.1
Loss (Gain) on Reverse Tresaury Lock		4.5
Commercial Paper [Member]
Debt and Financing Arrangements (Textual) [Abstract]
Commercial paper, borrowing capacity		2,000.0
Short-term borrowings		$ 641.0		$ 591.0
Commercial paper weighted-average interest rate		4.73%		5.48%
Commercial Paper [Member] | Hostess Brands
Debt and Financing Arrangements (Textual) [Abstract]
Short-term borrowings								$ 700.0
Term Loan Credit Agreement | Hostess Brands
Debt and Financing Arrangements (Textual) [Abstract]
Maximum borrowing capacity				$ 800.0
Repayment of long-term debt				800.0
Bridge Loan | Hostess Brands
Debt and Financing Arrangements (Textual) [Abstract]
Maximum borrowing capacity				5,200.0
Bridge Loan				0.0				$ 0.0
Other debt gains (charges) – net				(19.5)
Senior Notes [Member]
Debt and Financing Arrangements (Textual) [Abstract]
Debt instrument face amount							$ 800.0
Capitalized debt issuance costs				31.8
Debt Instrument, Unamortized Discount				15.0
Senior Notes [Member] | Hostess Brands
Debt and Financing Arrangements (Textual) [Abstract]
Debt instrument face amount				3,500.0
Term Loan Credit Agreement Due March 5, 2027
Debt and Financing Arrangements (Textual) [Abstract]
Debt instrument face amount		$ 650.0		0.0
Long-Term Debt, Percentage Bearing Variable Interest, Percentage Rate		5.43%
Derivative Instruments, Gain (Loss) [Line Items]
Long-Term Debt, Percentage Bearing Variable Interest, Percentage Rate		5.43%
3.50% Senior Notes due March 15, 2025
Debt and Financing Arrangements (Textual) [Abstract]
Debt instrument face amount		$ 0.0		1,000.0
2.75% Senior Notes due September 15, 2041
Debt and Financing Arrangements (Textual) [Abstract]
Debt instrument face amount		177.5		300.0
Cash Tender Offer		122.5
Early Repayment of Senior Debt		122.5
Derivative Instruments, Gain (Loss) [Line Items]
Cash Tender Offer		122.5
3.55% Senior Notes due March 15, 2050
Debt and Financing Arrangements (Textual) [Abstract]
Debt instrument face amount		161.2		300.0
Cash Tender Offer		138.8
Early Repayment of Senior Debt		138.8
Derivative Instruments, Gain (Loss) [Line Items]
Cash Tender Offer		138.8
2.13% Senior Notes due March 15, 2032
Debt and Financing Arrangements (Textual) [Abstract]
Debt instrument face amount		364.5		500.0
Cash Tender Offer		194.1
Early Repayment of Senior Debt		135.5
Derivative Instruments, Gain (Loss) [Line Items]
Cash Tender Offer		194.1
Revolving Credit Facility [Member]
Debt and Financing Arrangements (Textual) [Abstract]
Revolving credit facility maximum borrowing capacity		2,000.0		2,000.0
Outstanding balance under revolving credit facility		0.0		$ 0.0
Revolving Credit Facility, Debt Issuance Costs		3.9
Derivative Instruments, Gain (Loss) [Line Items]
Revolving Credit Facility, Debt Issuance Costs		$ 3.9
Interest Rate Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Deferred pre-tax net gain (loss) included in accumulated other comprehensive loss							$ (239.8)

[1] Includes special project costs related to certain divestiture, acquisition, integration, and restructuring activities. For more information, see Note 4: Special Project Costs, Note 5: Reportable Segments, and Note 8: Debt and Financing Arrangements.

[2] Includes special project costs related to certain divestiture, acquisition, integration, and restructuring activities. For more information, see Note 4: Special Project Costs and Note 8: Debt and Financing Arrangements.