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Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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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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No definition available.

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Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

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Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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No definition available.

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This item represents a financial instrument (as defined) for which it is not practicable to estimate fair value. Such disclosure may be for an individual financial instrument or a class of financial instruments.

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Total debt and equity financial instruments including: (1) securities held-to-maturity, (2) trading securities, and (3) securities available-for-sale.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS (Fair Value Measurements) (Details) - USD ($) $ in Millions	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016
Marketable Securities [Line Items]
Equity Method Investments, Fair Value Disclosure	$ 66				$ 37
Available-for-sale securities, Fair value	3,806				4,748
Marketable securities, Fair value	3,871	$ 5,004	$ 5,615	$ 4,884	4,832	$ 5,163	$ 4,998	$ 5,352
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Estimate Not Practicable, Other Equity Investments	152				8
Fair Value Level 1 [Member] \| Equity investments [Member]
Marketable Securities [Line Items]
Available-for-sale securities, Fair value	67				24
Fair Value Level 2 [Member]
Marketable Securities [Line Items]
Cash Equivalents, Fair Value	4,728				3,532
Total derivatives at fair value, assets	13				75
Total derivatives at fair value, liabilities	(52)				(30)
Fair Value Level 2 [Member] \| Certificates of Deposit [Member]
Marketable Securities [Line Items]
Available-for-sale securities, Fair value	141				27
Fair Value Level 2 [Member] \| Commercial Paper [Member]
Marketable Securities [Line Items]
Available-for-sale securities, Fair value	50				750
Fair Value Level 2 [Member] \| Corporate Debt Securities [Member]
Marketable Securities [Line Items]
Available-for-sale securities, Fair value	3,548				3,947
Fair Value Level 2 [Member] \| Equity Funds [Member]
Marketable Securities [Line Items]
Marketable securities, Fair value	124				101
Fair Value Level 2 [Member] \| Fixed Income Funds [Member]
Marketable Securities [Line Items]
Marketable securities, Fair value	$ 8				$ 7