Interim Financial Statements - Fair Value, Assets Held For Sale, Discontinued Operations (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Carrying Value	$ 1,766.3	$ 1,629.2
3.50% senior subordinated notes due 2025
Debt Instrument [Line Items]
Interest rate	3.50%
Carrying Value	$ 548.4	547.7
Fair Value	$ 533.8	529.7
3.75% senior subordinated notes due 2029
Debt Instrument [Line Items]
Interest rate	3.75%
Carrying Value	$ 496.2	495.8
Fair Value	448.9	444.4
Mortgage facilities
Debt Instrument [Line Items]
Carrying Value	453.7	402.1
Fair Value	$ 427.6	$ 378.5