Debt - Other (Details) $ in Millions			12 Months Ended
	Jan. 15, 2023 USD ($)	Sep. 03, 2020 USD ($)	Dec. 31, 2023 USD ($) item	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Debt
Total			$ 1,151.4	$ 1,659.6
Weighted average interest rate (as a percent)			2.88%	3.37%
Principal payment on long-term debt			$ 506.1	$ 0.3	$ 20.7
Number of financial maintenance covenants | item			2
Aggregate maturities of long-term debt for each of the next five years and thereafter
2024			$ 0.3
2025			400.3
2026			0.4
2027			0.4
2028			0.0
Thereafter			750.0
Total			1,151.4	1,659.6
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)			0.175%
Letters of credit outstanding			$ 1.4	7.7
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 | SOFR
Debt
Variable interest rate			SOFR
Interest rate added to base (as a percent)			1.10%
Unsecured revolving credit facility maturing September 3, 2025 | Bank prime rate
Debt
Variable interest rate			bank 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%
Senior unsecured notes, interest payable semi-annually at 4.50%, effective rate of 4.63%, redeemed on January 15, 2023
Debt
Total			$ 0.0	$ 500.0
Semi-annual rate (as a percent)	4.50%		4.50%	4.50%
Principal payment on long-term debt	$ 500.0
Aggregate maturities of long-term debt for each of the next five years and thereafter
Total			$ 0.0	$ 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
Semi-annual rate (as a percent)			1.30%	1.30%
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
Semi-annual rate (as a percent)			2.15%	2.15%
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
Semi-annual rate (as a percent)			6.85%	6.85%
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 | Asia
Debt
Maximum borrowing capacity			7.7
Lines of credit			0.0	2.2
IRB
Debt
Total			1.4	7.4
Aggregate maturities of long-term debt for each of the next five years and thereafter
Total			1.4	7.4
Letter of Credit | Standby Facility
Debt
Maximum borrowing capacity			50.0	50.0
Letters of credit outstanding			$ 40.9	$ 18.7