(Rollforward Of Common Stock Activity) (Details) - shares shares in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Class of Stock [Line Items]
Common stock, beginning balance	448,900
Common stock, ending balance	448,900	448,900
Treasury	102,900	98,600
Issued
Class of Stock [Line Items]
Common stock, beginning balance	448,916	448,916	448,916
Issuance of stock for various plans, net	0	0	0
Repurchase of stock	0	0	0
Common stock, ending balance	448,916	448,916	448,916
Common Stock Held In Treasury, At Cost
Class of Stock [Line Items]
Issuance of stock for various plans, net	(1,647)	(1,569)	(1,855)
Repurchase of stock	5,894	29,839	16,400
Treasury	102,879	98,632	70,362	55,817