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Lease Accounting - Schedule of Aggregate Lease Costs by Lease Classification (Detail) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Lease Cost [Line Items] |  |  |  |  |
Total operating lease costs |  | $ 89.1 | $ 89.2 | $ 255.3 | $ 264.8
Total finance lease costs |  | 4.8 | 4.2 | 14.2 | 12.7
Depreciation and Amortization |  |  |  |  |
Lease Cost [Line Items] |  |  |  |  |
Amortization of leased assets |  | 3.5 | 3.0 | 10.0 | 9.0
Interest Expense |  |  |  |  |
Lease Cost [Line Items] |  |  |  |  |
Interest on lease liabilities |  | 1.3 | 1.2 | 4.2 | 3.7
Equipment | Utilities and Other |  |  |  |  |
Lease Cost [Line Items] |  |  |  |  |
Total operating lease costs | [1] | 1.2 | 0.7 | 2.8 | 3.4
Real Estate | Facility Lease Expense |  |  |  |  |
Lease Cost [Line Items] |  |  |  |  |
Total operating lease costs | [1] | $ 87.9 | $ 88.5 | $ 252.5 | $ 261.4
[1] | Includes short-term lease payments, variable lease payments and office and equipment lease payments reflected in general and administrative expense as set forth in the following table for the periods presented:

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