CONSOLIDATED BALANCE SHEETS (Parentheticals) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Statement of Financial Position [Abstract]
Receivables, less allowance	$ 11	$ 11
Preferred Stock, par value (dollars per share)	$ 0.01	$ 0.01
Common stock, par value (dollars per share)	$ 0.01	$ 0.01
Preferred stock authorized (shares)	10,000,000	10,000,000
Preferred stock issued (shares)	0	0
Preferred stock outstanding (shares)	0	0
Common stock authorized (shares)	400,000,000	400,000,000
Common stock issued (shares)	135,500,000	135,500,000
Common stock outstanding (shares)	87,200,000	91,900,000
Treasury stock (shares)	48,300,000	43,600,000