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Share-Based Compensation - Additional Information (Details) - USD ($)		12 Months Ended
	Jun. 03, 2024	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Stock option issued (in shares)		0	0	0
Aggregate intrinsic value of stock options and cash-based stock appreciation rights, outstanding		$ 61,000,000	$ 44,000,000	$ 48,000,000
Aggregate intrinsic value of stock options and cash-based stock appreciation rights, exercisable		61,000,000	44,000,000	48,000,000
Total intrinsic value of stock options and cash-based stock appreciation rights, exercised		$ 25,000,000	5,000,000	8,000,000
Plan
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Shares granted (in shares)		6,000,000
Employee Stock Purchase Plan
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Market price of common stock	85.00%
Consecutive offering period	6 months
Employee Stock Purchase Plan \| Minimum
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Employee stock purchase plan of payroll deductions	10.00%
Employee Stock Purchase Plan \| Maximum
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Employee stock purchase plan of payroll deductions	15.00%
Employee Stock Purchase Plan \| Plan
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Common stock authorized for issuance under the plan (in shares)		13,450,000
Employee Stock Purchase Plan \| Coherent, Inc. Plan
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Shares granted (in shares)		0
Restricted Share Units
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Units granted (in shares)	147,214	2,740,565
Award vesting period	3 years
Performance Stock Units
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Units granted (in shares)	694,007	1,244,605
Award vesting period	3 years
Share based compensation expense attributable to non-vested shares		$ 102,000,000
Unrecognized compensation cost, weighted-average period of recognition, years		2 years 2 months 26 days
Total fair value of restricted stock grant		$ 113,000,000	27,000,000	14,000,000
Total fair value of restricted stock vested		$ 14,000,000	$ 24,000,000	11,000,000
Performance Stock Units \| Minimum
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Award grants performance period		12 months
Performance Stock Units \| Maximum
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Award grants performance period		36 months
Stock Options and Cash-Based Stock Appreciation Rights
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Share based compensation expense attributable to non-vested shares		$ 0
Restricted Share Awards and Cash-Based Restricted Share Unit Awards
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Award vesting period		3 years
Share based compensation expense attributable to non-vested shares		$ 96,000,000
Unrecognized compensation cost, weighted-average period of recognition, years		2 years
Shares issued (in shares)		0	0
Total fair value of restricted stock grant		$ 110,000,000	$ 102,000,000	54,000,000
Total fair value of restricted stock vested		$ 74,000,000	$ 131,000,000	$ 67,000,000