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Stockholders' Equity Treasury Shares (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended						12 Months Ended
	Nov. 30, 2023	Sep. 30, 2023	May 31, 2023	Nov. 30, 2022	May 31, 2022	Mar. 31, 2021	Dec. 31, 2023	Dec. 31, 2022
Equity, Class of Treasury Stock [Line Items]
Treasury stock (in shares)	2,427,532	1,768,116	1,709,638	1,159,775	918,367	663,083	1,747,438	640,492
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 278.7	$ 478.7	$ 0.0	$ 207.4	$ 98.1	$ 223.1	$ 278.7
Stock Repurchase Program, Authorized Amount							500.0
Treasury Stock, Shares, Acquired	659,416	58,478	549,863	241,408	255,284	89,506
Treasury Stock Acquired, Average Cost Per Share	$ 303.30	$ 364.61	$ 377.20	$ 375.63	$ 489.65	$ 558.60
Stock Repurchased During Period, Value							$ 650.0
Treasury Class-A [Member]
Equity, Class of Treasury Stock [Line Items]
Stock Issued During Period, Shares, Treasury Stock Reissued							(160,811)	(135,744)

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