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Acquisitions - Narrative (Details) $ in Millions |  | 12 Months Ended |  |
--- | --- | --- | --- | ---
Dec. 01, 2021 USD ($) coworker | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Jul. 30, 2021 USD ($) | Mar. 15, 2021 USD ($)
Business Acquisition [Line Items] |  |  |  |  |  |
Net sales |  | $ 20,820.8 | $ 18,467.5 | $ 18,032.4 |  |
Net income |  | 988.6 | $ 788.5 | $ 736.8 |  |
Sirius Computer Solutions, Inc. |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Total preliminary purchase price | $ 2,418.3 |  |  |  |  |
Number of coworkers | coworker | 2,600 |  |  |  |  |
Net sales |  | 197.0 |  |  |  |
Net income |  | $ 9.0 |  |  |  |
Goodwill, expected tax deductible amount | $ 160.0 |  |  |  |  |
Intangible assets, net | 1,140.5 |  |  |  |  |
Sirius Computer Solutions, Inc. | Senior Notes |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Proceeds from issuance of unsecured debt | 2,500.0 |  |  |  |  |
Sirius Computer Solutions, Inc. | Selling and administrative expenses |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Transaction costs | $ 35.0 |  |  |  |  |
Focal Point Data Risk LLC | Customer relationships |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Intangible assets, net |  |  |  |  | $ 36.0 |
Amplified IT LLC | Customer relationships |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Intangible assets, net |  |  |  |  |  | $ 88.0

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