Annual report pursuant to Section 13 and 15(d)

CONSOLIDATED BALANCE SHEETS BALANCE SHEET PARENTHETICAL

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CONSOLIDATED BALANCE SHEETS BALANCE SHEET PARENTHETICAL - USD ($)
shares in Millions, $ in Millions
Dec. 31, 2020
Dec. 31, 2019
Balance Sheet Parenthetical [Abstract]    
Accounts Receivable, Allowance for Credit Loss, Current $ 526 $ 524
Common Stock, Par or Stated Value Per Share $ 0.25 $ 0.25
Common Stock, Shares Authorized 11,200 11,200
Common Stock, Shares, Issued 7,040 7,040
Treasury Stock, Shares 2,738 2,760