Consolidated Balance Sheets (Parenthetical) - $ / shares	Dec. 31, 2023	Dec. 31, 2022
Common stock, par value	$ 0.1	$ 0.1
Common stock, shares authorized	150,000,000	150,000,000
Common stock, shares issued	91,200,000	91,200,000
Treasury stock, common shares	18,100,000	14,900,000