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Debt - Summary of Debt (Details) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021 | Oct. 31, 2021 | Oct. 08, 2021 | Sep. 21, 2021 | Nov. 21, 2019 | Dec. 13, 2017 | Sep. 05, 2014
--- | --- | --- | --- | --- | --- | --- | --- | ---
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term debt | $ 2,491.5 | $ 2,491.0 |  |  |  |  |  |
Less unamortized debt issuance costs | 17.9 | 19.5 |  |  |  |  |  |
Long-term debt | 2,473.6 | 2,471.5 |  |  |  |  |  |
Line of Credit |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term debt | 0.0 | 0.0 |  |  |  |  |  |
3.65% Senior Notes, due September 2024 |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Stated interest rate |  |  | 4.50% |  |  |  |  |
3.65% Senior Notes, due September 2024 | Senior Notes |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term debt | $ 399.8 | $ 399.6 |  |  |  |  |  |
Stated interest rate | 3.65% | 3.65% |  | 4.50% | 4.50% |  |  |
3.40% Senior Notes, due December 2027 | Senior Notes |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term debt | $ 499.1 | $ 499.0 |  |  |  |  |  |
Stated interest rate | 3.40% | 3.40% |  |  |  |  |  | 3.65%
3.00% Senior Notes, due December 2029 | Senior Notes |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term debt | $ 499.5 | $ 499.5 |  |  |  |  |  |
Stated interest rate | 3.00% | 3.00% |  |  |  | 3.00% | 3.40% |
4.05% Senior Notes, due December 2049 | Senior Notes |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term debt | $ 396.7 | $ 396.6 |  |  |  |  |  |
Stated interest rate | 4.05% | 4.05% |  |  |  |  |  |
3.05% Senior Notes, due October 2051 | Senior Notes |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term debt | $ 696.4 | $ 696.3 |  |  |  |  |  |
Stated interest rate | 3.05% | 3.05% |  |  | 3.05% |  |  |

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