Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Statement of Financial Position [Abstract]
Allowance	$ 184	$ 189
Preferred stock, $100 par value - par value (in dollars per share)	$ 100	$ 100
Preferred stock, $100 par value - shares authorized (in shares)	50,000	50,000
Preferred stock, $100 par value - shares issued (in shares)	0	0
Common stock, $1 par value - par value (in dollars per share)	$ 1	$ 1
Common stock, $1 par value - shares authorized (in shares)	1,200,000,000	1,200,000,000
Common stock, $1 par value - shares issued (in shares)	441,889,500	440,668,112
Treasury stock at cost (in shares)	55,517,179	50,157,275