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Investments (Fair Values by Classification) (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Fair values of available-for-sale investments by classification in the Consolidated Balance Sheets
Marketable securities	$ 16	$ 48
Total interest-bearing securities	5,853	7,304
Available-for-sale investments [Member]
Fair values of available-for-sale investments by classification in the Consolidated Balance Sheets
Cash and cash equivalents	5,837	7,256
Marketable securities	16	48
Total interest-bearing securities	$ 5,853	$ 7,304

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- Definition

Fair values of available-for-sale investments by classification in the Consolidated Balance Sheets.

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), classified as current.

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Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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