(Rollforward Of Common Stock Activity) (Details) - shares shares in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Class of Stock [Line Items]
Common stock, beginning balance	448,900
Treasury stock, beginning balance	70,400
Common stock, ending balance	448,900	448,900
Treasury stock, ending balance	98,600	70,400
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
Treasury
Class of Stock [Line Items]
Treasury stock, beginning balance	70,362	55,817	56,800
Issuance of stock for various plans, net	(1,569)	(1,855)	(2,010)
Repurchase of stock	29,839	16,400	1,027
Treasury stock, ending balance	98,632	70,362	55,817