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Employee Benefit Plans (Tables)
 3 Months Ended
Sep. 30, 2024
Retirement Benefits [Abstract]  
Summary of Components of Stock-Based Compensation Expense
The following table represents pre-tax stock-based compensation expense for the three months ended September 30, 2024 and 2023, respectively:
Three Months Ended
September 30,
20242023
Operating expenses$9.1 $7.4 
Selling, general and administrative expenses42.3 42.8 
Research and development9.2 8.6 
Total stock-based compensation expense$60.6 $58.8 

During the three months ended September 30, 2024, the following activity occurred under the Company’s existing plans.
Summary of Changes in Stock Options Outstanding
Stock Options:
Number
of Options
(in thousands)		Weighted
Average Price
(in dollars)
Options outstanding at July 1, 20242,042 $159 
Options granted— $— 
Options exercised(498)$162 
Options forfeited/cancelled— $— 
Options outstanding at September 30, 20241,544 $158 
Summary of Time Based Restricted Shares and Units
Time-Based Restricted Stock and Time-Based Restricted Stock Units:
Number of Shares
(in thousands)		Number of Units
(in thousands)
Restricted shares/units outstanding at July 1, 2024124 1,053 
Restricted shares/units granted— 578 
Restricted shares/units vested(114)(418)
Restricted shares/units forfeited— (11)
Restricted shares/units outstanding at September 30, 202410 1,202 
Summary of Performance Based Restricted shares and units
Performance-Based Restricted Stock and Performance-Based Restricted Stock Units:
Number of Shares
(in thousands)		Number of Units
(in thousands)
Restricted shares/units outstanding at July 1, 202488 753 
Restricted shares/units granted— 293 
Restricted shares/units vested(58)(293)
Restricted shares/units forfeited(2)(2)
Restricted shares/units outstanding at September 30, 202428 751 
Summary of Net Benefit Costs
The components of net pension income were as follows:
Three Months Ended
September 30,
 20242023
Service cost – benefits earned during the period$1.5 $1.3 
Interest cost on projected benefits21.9 21.2 
Expected return on plan assets(29.0)(29.0)
Net amortization and deferral0.7 0.7 
Net pension (income)/expense$(4.9)$(5.8)