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Supplementary Data Property and Equipment (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2024
Property and Equipment [Abstract] |
Property, Plant and Equipment [Table Text Block] | Property and Equipment
|  | December 31,
|  | 2024 |  | 2023
Furniture and equipment |  | $ | 581.9 |  |  | $ | 632.8 |
Leasehold improvements |  | 501.8 |  |  | 507.0 |
Internal-use computer software |  | 603.2 |  |  | 585.1 |
Land and buildings |  | 138.0 |  |  | 136.7 |
Gross property and equipment |  | 1,824.9 |  |  | 1,861.6 |
Less: accumulated depreciation and amortization |  | (1,258.1) |  |  | (1,224.9) |
Total property and equipment, net |  | $ | 566.8 |  |  | $ | 636.7 |

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- Definition Property and Equipment [Abstract] + References No definition available. + Details
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- Definition Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 1 -SubTopic 10 -Topic 360 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482099/360-10-50-1 + Details
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