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Goodwill - Changes in Carrying Value of Goodwill by Operating Segment (Details) $ in Millions | 6 Months Ended
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Jun. 30, 2022 USD ($)
Goodwill [Line Items] |
Beginning balance | $ 4,736.8
Goodwill of acquired businesses | 421.4
Goodwill disposed of relating to sales of businesses | (2.0)
Foreign currency translation adjustments during the year | (7.2)
Ending balance | 5,149.0
Retail |
Goodwill [Line Items] |
Beginning balance | 2,987.2
Goodwill of acquired businesses | 18.9
Goodwill disposed of relating to sales of businesses | (2.0)
Foreign currency translation adjustments during the year | (6.2)
Ending balance | 2,997.9
National Programs |
Goodwill [Line Items] |
Beginning balance | 1,089.9
Goodwill of acquired businesses | 402.3
Goodwill disposed of relating to sales of businesses | 0.0
Foreign currency translation adjustments during the year | (1.0)
Ending balance | 1,491.2
Wholesale Brokerage |
Goodwill [Line Items] |
Beginning balance | 488.4
Goodwill of acquired businesses | 0.2
Goodwill disposed of relating to sales of businesses | 0.0
Foreign currency translation adjustments during the year | 0.0
Ending balance | 488.6
Services |
Goodwill [Line Items] |
Beginning balance | 171.3
Goodwill of acquired businesses | 0.0
Goodwill disposed of relating to sales of businesses | 0.0
Foreign currency translation adjustments during the year | 0.0
Ending balance | $ 171.3

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