Borrowings - Schedule of Outstanding Borrowings (Details) - USD ($) $ in Millions		Dec. 31, 2022		Dec. 31, 2021		Mar. 31, 2021	Mar. 09, 2021	Nov. 25, 2019	Jun. 18, 2018	Jun. 21, 2010	Nov. 17, 2006
Outstanding Borrowings
Total borrowings at par value		$ 2,630.0		$ 3,025.0
Debt issuance costs and unamortized discount, net		(13.2)		(16.6)
Total borrowings at carrying value	[1]	2,616.8		3,008.4
Commercial Paper
Outstanding Borrowings
Total borrowings at par value		180.0		275.0
4.250% Notes Due 2023
Outstanding Borrowings
Total borrowings at par value		300.0	[2]	300.0	[2]				$ 300.0
2.850% Notes Due 2025
Outstanding Borrowings
Total borrowings at par value		500.0	[2]	500.0	[2]			$ 500.0
1.350% Notes Due 2026
Outstanding Borrowings
Total borrowings at par value		600.0	[2]	600.0	[2]	$ 600.0	$ 600.0
2.750% Notes Due 2031
Outstanding Borrowings
Total borrowings at par value		300.0	[2]	300.0	[2]		$ 300.0
6.200% Notes Due 2036
Outstanding Borrowings
Total borrowings at par value		500.0	[2]	500.0	[2]						$ 500.0
6.200% Notes Due 2040
Outstanding Borrowings
Total borrowings at par value		$ 250.0	[2]	250.0	[2]					$ 250.0
Term Loan Facility Borrowing
Outstanding Borrowings
Total borrowings at par value	[3]			$ 300.0

[1] As of December 31, 2022, the Company’s weighted-average effective rate on total borrowings was approximately 3.9%.

[2] The difference between the stated interest rate and the effective interest rate is not significant.

[3] See the Term Loan Facility section below for further discussion of the repayment of the term loan made in 2022.