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Borrowings - Schedule of Outstanding Borrowings (Details) - USD ($)
$ in Millions

Dec. 31, 2021

Mar. 31, 2021

Mar. 09, 2021

Dec. 31, 2020

Nov. 25, 2019

Dec. 18, 2018

Jun. 18, 2018

Aug. 22, 2017

Mar. 15, 2017

Nov. 22, 2013

Jun. 21, 2010

Nov. 17, 2006

Outstanding Borrowings

Total borrowings at par value

$ 3,025.0

$ 3,080.0

Debt issuance costs and unamortized discount, net

(16.6)

(12.8)

Total borrowings at carrying value

^[1]

3,008.4

3,067.2

Commercial Paper

Outstanding Borrowings

Total borrowings at par value

275.0

80.0

3.350% Notes Due 2019

Outstanding Borrowings

Total borrowings at par value

$ 250.0

Floating Rate Notes Due 2019

Outstanding Borrowings

Total borrowings at par value

$ 250.0

3.600% Notes Due 2022

Outstanding Borrowings

Total borrowings at par value

500.0

500.0

^[2]

$ 100.0

$ 400.0

4.250% Notes Due 2023

Outstanding Borrowings

Total borrowings at par value

300.0

^[3]

300.0

^[3]

$ 300.0

2.850% Notes Due 2025

Outstanding Borrowings

Total borrowings at par value

500.0

^[3]

500.0

^[3]

$ 500.0

1.350% Notes Due 2026

Outstanding Borrowings

Total borrowings at par value

600.0

^[2]

$ 600.0

$ 600.0

2.750% Notes Due 2031

Outstanding Borrowings

Total borrowings at par value

300.0

^[2]

$ 300.0

6.200% Notes Due 2036

Outstanding Borrowings

Total borrowings at par value

500.0

^[3]

500.0

^[3]

$ 500.0

6.200% Notes Due 2040

Outstanding Borrowings

Total borrowings at par value

250.0

^[3]

250.0

^[3]

$ 250.0

Term Loan Facility Borrowing (Effective Rate of 1.4%)

Outstanding Borrowings

Total borrowings at par value

$ 300.0

^[2]

$ 950.0

^[2]

$ 950.0

[1]	As of December 31, 2021, the Company’s weighted-average effective rate on total borrowings was approximately 3.3%.
[2]	See the Term Loan Facility and Notes sections below for further discussion of the borrowings and repayments of the unsecured notes and term loan made in 2021.
[3]	The difference between the stated interest rate and the effective interest rate is not significant.

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