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Accounts Receivable, Net (Schedule of Receivables, Net) (Details) - USD ($) $ in Millions | Mar. 31, 2022 | Dec. 31, 2021
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Receivables [Abstract] |  |
Accounts receivable | $ 9,589 | $ 10,136
Allowance for expected credit losses | (513) | (475)
Total accounts receivable, net | $ 9,076 | $ 9,661

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