Interim Financial Statements - Fair Value, Assets Held For Sale, Discontinued Operations (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Interim Financial Statements
Carrying Value	$ 1,637.9	$ 1,474.0
3.50% senior subordinated notes due 2025
Interim Financial Statements
Interest rate (as a percent)	3.50%
Carrying Value	$ 545.8	544.7
Fair Value	$ 502.9	560.5
3.75% senior subordinated notes due 2029
Interim Financial Statements
Interest rate (as a percent)	3.75%
Carrying Value	$ 494.9	494.3
Fair Value	397.7	490.7
Mortgage facilities
Interim Financial Statements
Carrying Value	530.1	353.8
Fair Value	$ 499.6	$ 359.8

Amount, excluding unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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