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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	12 Months Ended
	Dec. 31, 2024 USD ($) $ / item $ / shares shares	Dec. 31, 2023 USD ($) $ / shares	Dec. 31, 2022 USD ($) $ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average period of recognition, unvested stock options	2 years 4 months 24 days
Number of stock plans \| $ / item	4
Option shares granted	2,789,000
Intrinsic value of stock options exercised \| $	$ 75.7	$ 10.8	$ 26.3
Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	4 years
Unrecognized compensation expense, unvested stock options \| $	$ 87.1
Maximum contractual term	10 years
Weighted average grant date fair value per share \| $ / shares	$ 22.53	$ 21.47	$ 22.10
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
2012 Plan [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized	10,769,230
Annual percentage limit for incremental shares that may be issued	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
2021 Plan [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized	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	9,892,082
Number of shares available for grant	3,117,085
NuVasive 2014 Plan [Member] \| Common Class A [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Reserved under stock based plans	276,530
Number of shares available for grant	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	359,464
Number of shares available for grant	287,392