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CONSOLIDATED BALANCE SHEET (Unaudited) (Parenthetical) - USD ($) $ in Millions | Mar. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Statement of Financial Position [Abstract] |  |
Allowance for accounts and notes receivable, current | $ 297 | $ 284
Allowance for long-term receivables | $ 404 | $ 387
Preferred stock, shares authorized (in shares) | 100,000,000 | 100,000,000
Preferred stock, par value (in dollars per share) | $ 1.00 | $ 1.00
Preferred stock, shares issued (in shares) | 0 | 0
Common stock, shares authorized (in shares) | 6,000,000,000 | 6,000,000,000
Common stock, par value (in dollars per share) | $ 0.75 | $ 0.75
Common stock, shares issued (in shares) | 2,442,676,580 | 2,442,676,580
Treasury stock (in shares) | 514,624,401 | 517,490,263
Redeemable equity | $ 123 | $ 120

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