Shareholders' Equity (Summary of Shares Outstanding) (Detail) - $ / shares	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Shareholders' Equity Note [Line Items]
Preferred stock without par value (in dollars per share)	$ 10,000,000
Shares of common stock authorized	1,200,000,000
Per share cash dividends paid (in dollars per share)	$ 2.66	$ 2.54	$ 2.42
Common stock, par or stated value per share	$ 1.667
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance (in shares)	235,210,854	235,073,926	235,907,026
Purchases (in shares)	(5,838,606)	(673,638)	(1,269,830)
Issuances (in shares)	555,635	810,566	436,730
Ending balance (in shares)	229,927,883	235,210,854	235,073,926
Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance (in shares)	581,146,136	581,146,136	581,146,136
Ending balance (in shares)	581,146,136	581,146,136	581,146,136
Treasury Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance (in shares)	345,935,282	346,072,210	345,239,110
Purchases (in shares)	(5,838,606)	(673,638)	(1,269,830)
Issuances (in shares)	555,635	810,566	436,730
Ending balance (in shares)	351,218,253	345,935,282	346,072,210