Interim Financial Statements - Fair Value, Assets Held For Sale, Discontinued Operations (Details) - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024
Debt Instrument [Line Items]
Carrying Value	$ 1,771.5	$ 1,852.0
3.50% senior subordinated notes due 2025
Debt Instrument [Line Items]
Interest rate	3.50%	3.50%
Carrying Value	$ 549.5	$ 549.1
Fair Value	$ 545.5	$ 543.0
3.75% senior subordinated notes due 2029
Debt Instrument [Line Items]
Interest rate	3.75%	3.75%
Carrying Value	$ 496.8	$ 496.6
Fair Value	456.6	451.8
Mortgage facilities
Debt Instrument [Line Items]
Carrying Value	428.4	474.8
Fair Value	$ 407.9	$ 450.6