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SHARE-BASED COMPENSATION - Summary of Stock Option Activity Under All Stock Plans (Details) shares in Millions	6 Months Ended
	Jun. 30, 2021 $ / shares shares
Number Outstanding
Beginning balance, Number Outstanding | shares	4.5
Options granted, Number Outstanding | shares	0.2
Options exercised, Number Outstanding | shares	(0.5)
Options forfeited/expired, Number Outstanding | shares	(0.1)
Ending balance, Number Outstanding | shares	4.1
Weighted Average Exercise Price Per Share
Beginning balance, Weighted Average Exercise Price Per Share | $ / shares	$ 305.06
Options granted, Weighted Average Exercise Price Per Share | $ / shares	744.83
Options exercised, Weighted Average Exercise Price Per Share | $ / shares	213.18
Options forfeited/expired, Weighted Average Exercise Price Per Share | $ / shares	564.48
Ending balance, Weighted Average Exercise Price Per Share | $ / shares	$ 335.91

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Share-based Compensation Arrangement by Share-based Payment Award, Options, Weighted Average Exercise Price [Abstract]

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Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements.

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

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Number of options outstanding, including both vested and non-vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options of the plan that expired.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Number of share options (or share units) exercised during the current period.

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