Interim Financial Statements - Fair Value, Assets Held For Sale, Discontinued Operations (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Carrying Value	$ 1,677.2	$ 1,629.2
3.50% senior subordinated notes due 2025
Debt Instrument [Line Items]
Interest rate	3.50%
Carrying Value	$ 548.0	547.7
Fair Value	$ 533.3	529.7
3.75% senior subordinated notes due 2029
Debt Instrument [Line Items]
Interest rate	3.75%
Carrying Value	$ 496.0	495.8
Fair Value	445.4	444.4
Mortgage facilities
Debt Instrument [Line Items]
Carrying Value	359.0	402.1
Fair Value	$ 333.2	$ 378.5