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Schedule 2 - Parent Company Financial Statements - Future Minimum Lease Payments (Details) - USD ($) $ in Millions | Dec. 31, 2020 | Sep. 22, 2020 | Dec. 31, 2019
--- | --- | --- | ---
Condensed Financial Statements, Captions [Line Items] |  |  |
Due Next 12 Months | $ 20.8 |  |
Due Year Two | 19.5 |  |
Due Year Three | 17.8 |  |
Due Year Four | 13.1 |  |
Due Year Five | 8.4 |  |
Due after Year Five | 24.2 |  |
Total Future Payments | 103.8 |  |
Less Discount | 14.2 |  |
Present Value of Minimum Lease Payments | 89.6 |  | $ 93.2
Long-term Debt, Current and Non-current, at Amortized Cost (Fair Value: 2020 - $1,247.8; 2019 - $820.2) | 1,172.8 |  | 778.4
Senior Notes, 2.400 Percent Due September 30, 2030 | Senior Notes |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |
Long-term Debt, Current and Non-current, at Amortized Cost (Fair Value: 2020 - $1,247.8; 2019 - $820.2) | 395.8 |  | 0.0
Long-term debt, gross | 400.0 |  |
Stated interest rate, percentage |  | 2.40% |
Parent Company |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |
Due Next 12 Months | 2.2 |  |
Due Year Two | 2.4 |  |
Due Year Three | 2.4 |  |
Due Year Four | 2.5 |  |
Due Year Five | 2.6 |  |
Due after Year Five | 22.9 |  |
Total Future Payments | 35.0 |  |
Less Discount | 8.1 |  |
Present Value of Minimum Lease Payments | 26.9 |  | $ 31.3
Parent Company | Senior Notes, 2.400 Percent Due September 30, 2030 |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |
Long-term Debt, Current and Non-current, at Amortized Cost (Fair Value: 2020 - $1,247.8; 2019 - $820.2) | $ 395.8 |  |

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