Debt (Narrative) (Details)	1 Months Ended		3 Months Ended
	Apr. 30, 2026 USD ($)	Apr. 30, 2025 USD ($)	May 02, 2026 USD ($) renewal_option note	May 03, 2025 USD ($) note	Jan. 31, 2026 USD ($) note
Debt Instrument [Line Items]
Payment of long-term debt			$ 500,000,000	$ 700,000,000
Senior Notes
Debt Instrument [Line Items]
Number of series of Senior Notes | note			4	5	5
Senior Notes | Fair Value, Inputs, Level 1
Debt Instrument [Line Items]
Unsecured senior notes estimated fair value			$ 1,000,000,000.0	$ 1,400,000,000	$ 1,500,000,000
Unsecured Debt | Standby Letters of Credit
Debt Instrument [Line Items]
Amount outstanding			$ 0
0.875% Senior Notes due 2026 | Senior Notes
Debt Instrument [Line Items]
Payment of long-term debt	$ 500,000,000
Unsecured senior notes interest rate (percent)	0.875%		0.875%
Senior Notes Due 2025 | Senior Notes
Debt Instrument [Line Items]
Payment of long-term debt		$ 700,000,000
Unsecured senior notes interest rate (percent)		4.60%
Credit Facility | Unsecured Debt | Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity			$ 1,300,000,000
Number of renewal options | renewal_option			2
Renewal option, term			1 year
Option to increase credit facility, additional amount (up to)			$ 700,000,000
Remaining borrowing capacity			1,300,000,000
Credit Facility | Unsecured Debt | Standby Letters of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity			$ 300,000,000