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Other current assets and accrued liabilities - Schedule of Other Assets (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Payables and Accruals [Abstract]
Prepaid expenses	$ 1,156	$ 939
Corporate partner receivables	583	485
Tax receivables	216	186
Other	124	278
Total other current assets	$ 2,079	$ 1,888

X

- Definition

Carrying amount as of the balance sheet date of current interest earned but not received. Also called accrued interest or accrued interest receivable. For classified balance sheets, represents the current amount receivable, that is amounts expected to be collected within one year or the normal operating cycle, if longer.

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Amount of current assets classified as other.

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Amount of other miscellaneous assets expected to be realized or consumed within one year or operating cycle, if longer.

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Amount of asset related to consideration paid in advance for other costs that provide economic benefits within a future period of one year or the normal operating cycle, if longer.

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Amount, before allowance, of receivables classified as other, due within one year or the operating cycle, if longer.

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