Earnings Per Share, Share Repurchases and Dividends on Common Stock (Unaudited) Earnings Per Share and Dividends (Details 1) - $ / shares shares in Millions	1 Months Ended		3 Months Ended
	May 31, 2023	May 31, 2022	Mar. 31, 2024	Mar. 31, 2023
Earnings Per Share [Abstract]
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements			0.4	0.6
Common stock dividends per share, declared (in dollars per share)	$ 1.87	$ 1.73	$ 1.87	$ 1.73
Increase in quarterly common stock dividend (percent)	8.00%