Unaudited Consolidated Balance Sheets (Parentheticals) - $ / shares	Dec. 31, 2023	Dec. 31, 2022
Statement of Financial Position [Abstract]
Preferred stock, par value per share	$ 0	$ 0
Preferred stock, shares authorized	20,000,000.0	20,000,000.0
Preferred stock, shares issued	0	0
Common stock, par value per share	$ 1.25	$ 1.25
Common stock, shares authorized	1,200,000,000	1,200,000,000
Common stock, shares issued	378,600,000	378,600,000
Treasury Stock, Common, Shares	41,600,000	41,100,000