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Other Financial Information - Accounts Receivable, Net (Details) - USD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020
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Other Financial Information [Abstract] |  |
Accounts receivable | $ 5,278 | $ 5,560
Less: chargebacks | 671 | 552
Less: cash discounts and other | 67 | 72
Less: allowances for credit losses | 47 | 44
Accounts receivable, net | $ 4,493 | $ 4,892

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