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Borrowings - Schedule of Outstanding Borrowings (Parenthetical) (Details) £ in Millions, $ in Millions	9 Months Ended
	Sep. 30, 2025 USD ($)	Sep. 30, 2025 GBP (£)	Feb. 28, 2025 USD ($)	Dec. 31, 2024
Outstanding Borrowings
Weighted-average effective interest rate (as a percent)	4.40%	4.40%
Repayment of aggregate principal amount	$ 500.0
Commercial Paper
Outstanding Borrowings
Threshold over which Commercial Paper Program limit will be reduced for borrowings on revolving credit facility	$ 1,620.0
Maximum days to maturity	397 days
Weighted-average effective interest rate (as a percent)	4.30%	4.30%
Weighted-average term	1 day
Revolving Credit Facility
Outstanding Borrowings
Maximum borrowing capacity			$ 1,620.0
Revolving Credit Facility | Eurochange Limited
Outstanding Borrowings
Maximum borrowing capacity	$ 80.0	£ 60
Revolving credit facility expiration	2030-02
Weighted-average effective interest rate (as a percent)	5.50%	5.50%
2.850% Notes Due 2025
Outstanding Borrowings
Stated interest rate (as a percent)	2.85%	2.85%		2.85%
Repayment of aggregate principal amount	$ 500.0
1.350% Notes Due 2026
Outstanding Borrowings
Stated interest rate (as a percent)	1.35%	1.35%		1.35%
2.750% Notes Due 2031
Outstanding Borrowings
Stated interest rate (as a percent)	2.75%	2.75%		2.75%
6.200% Notes Due 2036
Outstanding Borrowings
Stated interest rate (as a percent)	6.20%	6.20%		6.20%
6.200% Notes Due 2040
Outstanding Borrowings
Stated interest rate (as a percent)	6.20%	6.20%		6.20%
Term Loan Facility Borrowing
Outstanding Borrowings
Stated interest rate (as a percent)	5.40%	5.40%		5.40%

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