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v3.20.4

Business Segments, Currencies (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Schedule of Significant Currencies [Line Items] |  |  |
Document Period End Date | Dec. 31, 2020 |  |
Revenues | $ 16,589.9 | $ 17,983.2 | $ 16,318.4
Total Assets | 14,316.5 | 13,672.6 |
United States dollar [Member] |  |  |
Schedule of Significant Currencies [Line Items] |  |  |
Revenues | 9,457.8 | 10,054.9 | 8,523.8
Euro [Member] |  |  |
Schedule of Significant Currencies [Line Items] |  |  |
Revenues | 1,350.6 | 1,507.7 | 1,527.1
British pound [Member] |  |  |
Schedule of Significant Currencies [Line Items] |  |  |
Revenues | 1,341.1 | 1,514.8 | 1,526.3
Australian dollar [Member] |  |  |
Schedule of Significant Currencies [Line Items] |  |  |
Revenues | 876.1 | 924.5 | 916.7
Indian rupee [Member] |  |  |
Schedule of Significant Currencies [Line Items] |  |  |
Revenues | 524.5 | 651.8 | 580.4
Chinese yuan [Member] |  |  |
Schedule of Significant Currencies [Line Items] |  |  |
Revenues | 473.1 | 505.9 | 505.5
Hong Kong dollar [Member] |  |  |
Schedule of Significant Currencies [Line Items] |  |  |
Revenues | 512.2 | 533.8 | 487.2
Singapore dollar [Member] |  |  |
Schedule of Significant Currencies [Line Items] |  |  |
Revenues | 246.6 | 309.2 | 458.7
Canada, Dollars |  |  |
Schedule of Significant Currencies [Line Items] |  |  |
Revenues | 432.6 | 435.5 | 390.5
Japanese yen [Member] |  |  |
Schedule of Significant Currencies [Line Items] |  |  |
Revenues | 257.9 | 349.4 | 285.2
Other currencies [Member] |  |  |
Schedule of Significant Currencies [Line Items] |  |  |
Revenues | $ 1,117.4 | $ 1,195.7 | $ 1,117.0

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