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Cash and Cash Equivalents - Summary of Cash and Cash Equivalents (Detail) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Cash and cash equivalents [abstract]
Cash at bank and in hand	$ 925	$ 1,482
Investments (short-term deposits)	4,858	6,239
Total	$ 5,783	$ 7,721	$ 4,218	$ 2,686

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- Definition

The amount of cash on hand and demand deposits. [Refer: Cash on hand]

+ References

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- Definition

The amount of cash on hand and demand deposits, along with short-term, highly liquid investments that are readily convertible to known amounts of cash and that are subject to an insignificant risk of changes in value. [Refer: Cash; Cash equivalents]

+ References

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- Definition

A classification of cash equivalents representing short-term deposits. [Refer: Cash equivalents]

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