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Restructuring Activities (Tables)
 9 Months Ended
Sep. 30, 2024
Restructuring and Related Activities [Abstract]  
Summary of restructuring costs
The following table summarizes the total costs incurred in connection with the Company's restructuring activities taken during the three and nine months ended September 30, 2024 and 2023 (in millions):
Three Months Ended September 30,Nine Months Ended September 30,
2024202320242023
Severance related personnel costs$— $— $— $8.9 
Lease termination costs1.7 1.7 7.5 18.8 
Accelerated depreciation0.1 — 1.9 5.3 
Total expense$1.8 $1.7 $9.4 $33.0 
The total costs incurred in connection with the Company's restructuring activities taken during the three and nine months ended September 30, 2024 and 2023 were included in the condensed consolidated statements of operations as follows (in millions):
Three Months Ended September 30,Nine Months Ended September 30,
2024202320242023
Restructuring costs$1.7 $1.7 $7.5 $27.7 
Depreciation and amortization0.1 — 1.9 5.3 
Total expense$1.8 $1.7 $9.4 $33.0 
Other Commitments
The following table summarizes the estimated timing of the Company's future lease and lease-related payments, net of amounts contractually subleased, related to restructuring activities as of September 30, 2024 (in millions):
Payment Due by Period
Remaining 2024$5.5 
202511.4 
20267.0 
20275.7 
Thereafter7.7 
Total$37.3