XML 15 R3.htm IDEA: XBRL DOCUMENT v3.21.2
Condensed Consolidated Balance Sheets (unaudited) (Parenthetical) - USD ($)
$ in Millions
Jun. 30, 2021
Dec. 31, 2020
Statement of Financial Position [Abstract]    
Allowance for accounts receivable, current $ 117 $ 125
Common stock, par value (in dollars per share) $ 1 $ 1
Common stock, authorized (in shares) 2,000,000,000 2,000,000,000
Common stock, issued (in shares) 683,494,944 683,494,944
Treasury stock, shares (in shares) 183,639,786 178,580,208