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v3.23.2

Debt - Long Term Debt (Details) - USD ($) $ in Millions | 6 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Jun. 30, 2023 | Dec. 31, 2022 | Mar. 10, 2022 | Feb. 15, 2022 | Sep. 22, 2020
Debt Instrument [Line Items] |  |  |  |  |
Long-term Debt | $ 1,388.1 | $ 1,386.9 |  |  |
Derivative, Gain (Loss) on Derivative, Net | 0.5 |  |  |  |
Gain (Loss) on Derivative Instruments, Net, Pretax | 0.3 |  |  |  |
2.400% Senior Notes due September 30, 2030 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Long-term Debt |  |  |  |  | $ 395.8
Senior Notes, 3.800 Percent Due February 23, 2033 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Long-term Debt |  |  |  | $ 395.1 |
5.875% Fixed-Rate Reset Junior Subordinated Debentures due 2062 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Long-term Debt |  |  | $ 144.7 |  |
Senior Notes | 4.350% Senior Notes due February 15, 2025 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Long-term Debt | $ 449.5 | 449.3 |  |  |
Stated interest rate | 4.35% |  |  |  |
Senior Notes | 2.400% Senior Notes due September 30, 2030 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Long-term Debt | $ 396.8 | 396.6 |  |  |
Stated interest rate |  |  |  |  | 2.40%
Senior Notes | Senior Notes, 3.800 Percent Due February 23, 2033 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Long-term Debt | 395.7 | 395.5 |  |  |
Stated interest rate |  |  |  | 3.80% |
Senior Notes | Senior Notes, 5.875 Percent Due March 15, 2062 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Long-term Debt | $ 146.1 | $ 145.5 |  |  |
Junior Debt | Senior Notes, 5.875 Percent Due March 15, 2062 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Stated interest rate |  |  | 5.875% |  |

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