Earnings Per Share, Share Repurchases and Dividends on Common Stock (Unaudited) Earnings Per Share and Dividends (Details 1) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	1 Months Ended		3 Months Ended		9 Months Ended
	May 31, 2022	May 31, 2021	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Earnings Per Share [Abstract]
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements			0.7	0.6	0.6	0.5
Common stock dividends per share, declared (in dollars per share)		$ 1.57	$ 1.73	$ 1.57	$ 5.03	$ 4.59
Increase in quarterly common stock dividend (percent)	10.00%
Common Stock Repurchased					$ 1,000