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Business Segments, Currencies (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Schedule of Significant Currencies [Line Items] |  |  |
Revenues | $ 20,760.8 | $ 20,862.1 | $ 19,367.0
United States dollar [Member] |  |  |
Schedule of Significant Currencies [Line Items] |  |  |
Revenues | 12,258.9 | 12,375.9 | 11,283.1
British pound [Member] |  |  |
Schedule of Significant Currencies [Line Items] |  |  |
Revenues | 1,640.0 | 1,575.6 | 1,626.6
Euro [Member] |  |  |
Schedule of Significant Currencies [Line Items] |  |  |
Revenues | 1,436.1 | 1,535.6 | 1,393.3
Australian dollar [Member] |  |  |
Schedule of Significant Currencies [Line Items] |  |  |
Revenues | 1,036.9 | 1,183.0 | 1,118.7
Indian rupee [Member] |  |  |
Schedule of Significant Currencies [Line Items] |  |  |
Revenues | 661.4 | 591.0 | 508.2
Canada, Dollars |  |  |
Schedule of Significant Currencies [Line Items] |  |  |
Revenues | 613.8 | 593.8 | 508.3
Hong Kong dollar [Member] |  |  |
Schedule of Significant Currencies [Line Items] |  |  |
Revenues | 544.8 | 532.3 | 545.6
Chinese yuan [Member] |  |  |
Schedule of Significant Currencies [Line Items] |  |  |
Revenues | 480.9 | 506.0 | 539.1
Singapore dollar [Member] |  |  |
Schedule of Significant Currencies [Line Items] |  |  |
Revenues | 425.4 | 368.4 | 327.4
Japanese yen [Member] |  |  |
Schedule of Significant Currencies [Line Items] |  |  |
Revenues | 286.6 | 233.8 | 256.8
Other currencies [Member] |  |  |
Schedule of Significant Currencies [Line Items] |  |  |
Revenues | $ 1,376.0 | $ 1,366.7 | $ 1,259.9

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