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v3.22.1

Debt - Other (Details) $ in Millions |  | 3 Months Ended |
--- | --- | --- | ---
Sep. 03, 2020 USD ($) | Mar. 31, 2022 USD ($) item | Dec. 31, 2021 USD ($)
Debt |  |  |
Total |  | $ 1,662.4 | $ 1,662.4
Number of financial maintenance covenants | item |  | 2 |
Aggregate maturities of long-term debt for each of the next five years and thereafter |  |  |
Total |  | $ 1,662.4 | 1,662.4
Unsecured revolving credit facility maturing September 3, 2025 |  |  |
Debt |  |  |
Maximum borrowing capacity | $ 1,500.0 |  |
Debt term | 5 years |  |
Total |  | $ 0.0 | 0.0
Commitment fee on unused portion of revolving credit facility (as a percent) |  | 0.20% |
Letters of credit outstanding |  | $ 8.3 | 8.9
Aggregate maturities of long-term debt for each of the next five years and thereafter |  |  |
Total |  | $ 0.0 | 0.0
Unsecured revolving credit facility maturing September 3, 2025 | LIBOR |  |  |
Debt |  |  |
Variable interest rate |  | LIBOR |
Interest rate added to base (as a percent) |  | 1.25% |
Unsecured revolving credit facility maturing September 3, 2025 | Bank prime rate |  |  |
Debt |  |  |
Variable interest rate |  | bank prime rate |
Interest rate added to base (as a percent) |  | 0.25% |
Senior Unsecured Notes - Publicly Traded |  |  |
Debt |  |  |
Percentage of principal amount at which the notes may be required to be repurchased in event of a change of control and a downgrade of the entity's credit rating |  | 101.00% |
Senior unsecured notes, interest payable semi-annually at 4.50%, effective rate of 4.63%, maturing April 15, 2023 |  |  |
Debt |  |  |
Total |  | $ 500.0 | 500.0
Aggregate maturities of long-term debt for each of the next five years and thereafter |  |  |
Total |  | 500.0 | 500.0
Senior unsecured notes, interest payable semi-annually at 1.30%, effective rate of 1.53%, maturing August 15, 2025 |  |  |
Debt |  |  |
Total |  | 400.0 | 400.0
Aggregate maturities of long-term debt for each of the next five years and thereafter |  |  |
Total |  | 400.0 | 400.0
Senior unsecured notes, interest payable semi-annually at 2.15%, effective rate of 2.27%, maturing August 15, 2030 |  |  |
Debt |  |  |
Total |  | 500.0 | 500.0
Aggregate maturities of long-term debt for each of the next five years and thereafter |  |  |
Total |  | 500.0 | 500.0
Senior unsecured notes, interest payable semi-annually at 6.85%, effective rate of 6.91%, maturing November 15, 2036 |  |  |
Debt |  |  |
Total |  | 250.0 | 250.0
Aggregate maturities of long-term debt for each of the next five years and thereafter |  |  |
Total |  | 250.0 | 250.0
Other separate revolving credit facilities |  |  |
Debt |  |  |
Maximum borrowing capacity |  | 8.6 |
Total |  | 4.7 | 4.7
Aggregate maturities of long-term debt for each of the next five years and thereafter |  |  |
Total |  | 4.7 | 4.7
IRB |  |  |
Debt |  |  |
Total |  | 7.7 | 7.7
Aggregate maturities of long-term debt for each of the next five years and thereafter |  |  |
Total |  | 7.7 | $ 7.7
Letter of Credit | Standby Facility |  |  |
Debt |  |  |
Maximum borrowing capacity |  | 50.0 |
Letters of credit outstanding |  | $ 21.9 |
Letter of credit sublimit |  |  |
Debt |  |  |
Maximum borrowing capacity | $ 150.0 |  |

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