STOCKHOLDERS' EQUITY - Additional Information (Details) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
Mar. 31, 2020 USD ($) u_baxEmployees $ / shares shares	Mar. 31, 2019 USD ($) $ / shares
Stockholders Equity Note [Line Items]
Stock compensation	$ 29	$ 22
Total intrinsic value of stock options exercised	$ 52	$ 153
Cash dividends declared per common share (in dollars per share) \| $ / shares	$ 0.22	$ 0.19
Number of employees affected \| u_baxEmployees	123
Selling, General and Administrative Expenses
Stockholders Equity Note [Line Items]
Share -based compensation allocation, percentage	70.00%
Employee Stock Option
Stockholders Equity Note [Line Items]
Gross stock options (in shares) \| shares	3.7
Stock granted, value, share-based compensation, gross	$ 59
Unrecognized compensation cost related to all unvested stock options	$ 103
Weighted-average period for all unvested stock options	2 years 1 month 6 days
Incremental compensation cost	$ 8
Restricted Stock Units (RSUs)
Stockholders Equity Note [Line Items]
Grants in period (in shares) \| shares	0.5
Stock granted, value, share-based compensation, gross	$ 37
Unrecognized compensation cost related to all unvested stock options	$ 73
Weighted-average period for all unvested stock options	2 years
Performance Shares
Stockholders Equity Note [Line Items]
Grants in period (in shares) \| shares	0.4
Stock granted, value, share-based compensation, gross	$ 29
Unrecognized compensation cost related to all unvested stock options	$ 44
Weighted-average period for all unvested stock options	2 years 1 month 6 days

Share Based Compensation Allocation Percentage

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Stockholders equity note.

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Aggregate dividends declared during the period for each share of common stock outstanding.

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Unrecognized cost of unvested share-based compensation awards.

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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- Definition

Gross number of share options (or share units) granted during the period.

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- Definition

An excess of the fair value of the modified award over the fair value of the award immediately before the modification.

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The number of employees affected by the modification of an equity-based compensation plan.

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Value, before forfeitures, of stock or other type of equity granted of any equity-based compensation plan other than an employee stock ownership plan (ESOP).

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