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Employee Benefit Plans (Tables)
 9 Months Ended
Mar. 31, 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 and nine months ended March 31, 2024 and 2023, respectively:
Three Months EndedNine Months Ended
March 31,March 31,
2024202320242023
Operating expenses$7.8 $6.1 $22.6 $18.5 
Selling, general and administrative expenses39.2 53.3 139.6 134.9 
Research and development9.3 8.2 26.5 23.2 
Total stock-based compensation expense$56.3 $67.6 $188.7 $176.6 
Summary of Net Benefit Costs
The components of net pension income were as follows:
Three Months EndedNine Months Ended
March 31,March 31,
 2024202320242023
Service cost – benefits earned during the period$1.3 $1.2 $3.9 $3.5 
Interest cost on projected benefits21.2 19.5 63.4 58.6 
Expected return on plan assets(29.0)(31.9)(86.9)(95.6)
Net amortization and deferral0.7 0.5 2.2 1.4 
Settlement charges and special termination benefits— — — 1.4 
Net pension (income)/expense$(5.8)$(10.7)$(17.4)$(30.7)