Earnings Per Share (Narrative) (Details) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021	Sep. 30, 2023	Oct. 31, 2021
Antidilutive securities excluded from computation of diluted earnings per share
Common stock, par value (in dollars per share)		$ 0.01		$ 0.01
2021 Share Repurchase Program
Antidilutive securities excluded from computation of diluted earnings per share
Treasury stock, shares, acquired (in shares)	1,579,646		1,023,284
Common stock, par value (in dollars per share)			$ 0.01
Shares repurchased, value	$ 153,400,000		$ 96,600,000
Average cost per share (in dollars per share)	$ 97.10		$ 94.42
2021 Share Repurchase Program | Common Stock
Antidilutive securities excluded from computation of diluted earnings per share
Stock repurchase program, authorized amount					$ 250,000,000
2022 Share Repurchase Program
Antidilutive securities excluded from computation of diluted earnings per share
Stock repurchase program, authorized amount	$ 250,000,000
Treasury stock, shares, acquired (in shares)		2,704,228
Shares repurchased, value		$ 235,000,000
Average cost per share (in dollars per share)		$ 86.90