Accumulated Other Comprehensive Income or Loss and Earnings Per Share (Narrative) (Detail) - $ / shares	1 Months Ended		3 Months Ended		6 Months Ended		12 Months Ended
	Apr. 30, 2023	Jan. 31, 2023	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2023
Class of Stock [Line Items]
Cash dividends declared per common share (usd per share)	$ 0.40	$ 0.40	$ 0.40	$ 0.34	$ 0.80	$ 0.68
Forecast
Class of Stock [Line Items]
Cash dividends declared per common share (usd per share)							$ 1.60