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Number of shares authorized for issuance under share-based payment arrangement.

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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STOCK-BASED AWARDS (Narrative) (Details) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024 USD ($) ShareBasedCompensationPlan $ / shares shares	Sep. 30, 2023 USD ($) $ / shares	Sep. 30, 2024 USD ($) ShareBasedCompensationPlan $ / shares shares	Sep. 30, 2023 USD ($) $ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense, unvested stock options \| $	$ 96.2		$ 96.2
Weighted average period of recognition, unvested stock options			2 years 6 months 25 days
Number of stock plans \| ShareBasedCompensationPlan	4		4
Option shares granted			2,592,000
Intrinsic value of stock options exercised \| $	$ 14.0	$ 2.2	$ 23.9	$ 10.3
Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period			4 years
Maximum contractual term			10 years
Weighted average grant date fair value per share \| $ / shares	$ 28.63	$ 20.61	$ 21.90	$ 21.95
PRSU's [Member] \| Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share payout levels, percentage			0.00%
PRSU's [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share payout levels, percentage			100.00%
2012 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option shares granted			0
Base number of shares that may be issuable under stock plan	3,076,923		3,076,923
2012 Plan [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized	10,769,230		10,769,230
Annual percentage limit for incremental shares that may be issued	3.00%		3.00%
2021 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Base number of shares that may be issuable under stock plan	9,000,000		9,000,000
2021 Plan [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Base number of shares that may be issuable under stock plan	9,000,000		9,000,000
2021 Plan [Member] \| Common Class A [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Reserved under stock based plans	9,887,190		9,887,190
Number of shares available for grant	3,185,194		3,185,194
NuVasive 2014 Plan [Member] \| Common Class A [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Reserved under stock based plans	297,607		297,607
Number of shares available for grant	0		0
Ellipse 2015 Plan [Member] \| Common Class A [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Reserved under stock based plans	372,523		372,523
Number of shares available for grant	285,757		285,757