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Debt - Other (Details) - USD ($) $ in Millions		9 Months Ended
	Sep. 10, 2024	Sep. 30, 2025	Aug. 15, 2025	Aug. 14, 2025	Dec. 31, 2024
Debt
Total		$ 1,389.1			$ 1,151.1
Weighted average interest rate (as a percent)		4.38%			3.02%
Unsecured revolving credit facility maturing September 10, 2029
Debt
Maximum borrowing capacity	$ 1,500.0
Debt term	5 years
Total		$ 238.0			$ 0.0
Commitment fee on unused portion of revolving credit facility (as a percent)		0.10%
Weighted average interest rate (as a percent)		5.27%
Letters of credit outstanding		$ 1.1			1.1
Unsecured revolving credit facility maturing September 10, 2029 | SOFR
Debt
Variable interest rate		SOFR
Interest rate added to base (as a percent)		1.00%
Unsecured revolving credit facility maturing September 10, 2029 | Bank prime rate
Debt
Variable interest rate		prime rate
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%
Letter of Credit | Standby Facility
Debt
Maximum borrowing capacity		$ 50.0			50.0
Letters of credit outstanding		35.1			29.2
Unsecured term loan due August 14, 2028
Debt
Total		$ 400.0		$ 400.0
Weighted average interest rate (as a percent)		4.90%
Unsecured term loan due August 14, 2028 | SOFR
Debt
Variable interest rate		SOFR
Interest rate added to base (as a percent)		0.75%
Unsecured term loan due August 15, 2025
Debt
Total		$ 0.0			$ 400.0
Semi-annual rate (as a percent)			1.30%		1.30%
Lump sum payment on maturity			$ 400.0

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