Debt (Details) € in Millions, £ in Millions, $ in Millions	3 Months Ended
	Jul. 31, 2025 USD ($)	Jul. 31, 2025 EUR (€)	Jul. 31, 2025 GBP (£)	Apr. 30, 2025 USD ($)	Apr. 30, 2025 EUR (€)	Apr. 30, 2025 GBP (£)
Debt Instrument [Line Items]
Long-term debt, including current portion	$ 2,419			$ 2,421
Current portion of long-term debt	344			0
Long-term debt	$ 2,075			$ 2,421
1.20% notes, due July 7, 2026 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount | €		€ 300			€ 300
Debt Instrument, Maturity Date	Jul. 07, 2026
Debt Instrument, Interest Rate, Stated Percentage	1.20%	1.20%	1.20%	1.20%	1.20%	1.20%
Long-term debt, including current portion	$ 344			$ 342
2.60% notes, due July 7, 2028 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount | £			£ 300			£ 300
Debt Instrument, Maturity Date	Jul. 07, 2028
Debt Instrument, Interest Rate, Stated Percentage	2.60%	2.60%	2.60%	2.60%	2.60%	2.60%
Long-term debt, including current portion	$ 397			$ 401
4.75% senior notes, due April 15, 2033 {Member}
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 650			$ 650
Debt Instrument, Maturity Date	Apr. 15, 2033
Debt Instrument, Interest Rate, Stated Percentage	4.75%	4.75%	4.75%	4.75%	4.75%	4.75%
Long-term debt, including current portion	$ 644			$ 644
4.00% senior notes, due April 15, 2038 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 300			$ 300
Debt Instrument, Maturity Date	Apr. 15, 2038
Debt Instrument, Interest Rate, Stated Percentage	4.00%	4.00%	4.00%	4.00%	4.00%	4.00%
Long-term debt, including current portion	$ 296			$ 296
3.75% notes, due January 15, 2043 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 250			$ 250
Debt Instrument, Maturity Date	Jan. 15, 2043
Debt Instrument, Interest Rate, Stated Percentage	3.75%	3.75%	3.75%	3.75%	3.75%	3.75%
Long-term debt, including current portion	$ 248			$ 248
4.50% notes, due July 15, 2045 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 500			$ 500
Debt Instrument, Maturity Date	Jul. 15, 2045
Debt Instrument, Interest Rate, Stated Percentage	4.50%	4.50%	4.50%	4.50%	4.50%	4.50%
Long-term debt, including current portion	$ 490			$ 490