Equity (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2021
Equity, Class of Treasury Stock [Line Items]
Stockholders' Equity Attributable to Noncontrolling Interest	$ 90.0	$ 90.0	$ 90.0	$ 90.0	$ 90.0	$ 90.0	$ 90.0	$ 0.0
Net Income (Loss) Attributable to Noncontrolling Interest	2.0	$ 1.0	5.0	$ 2.0	$ 4.0
Share Repurchase Program [Member]
Equity, Class of Treasury Stock [Line Items]
Stock Repurchase Program, Authorized Amount	$ 400.0		$ 400.0
Common Stock Held In Treasury [Member]
Equity, Class of Treasury Stock [Line Items]
Treasury Stock, Shares, Acquired			1,069,113	414,350