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Goodwill - Changes in Carrying Value of Goodwill by Reportable Segment (Details) $ in Millions | 6 Months Ended
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Jun. 30, 2023 USD ($)
Goodwill [Line Items] |
Beginning balance | $ 6,674.2
Goodwill adjustment during measurement period | (9.0)
Goodwill of acquired businesses | 125.8
Goodwill disposed of relating to sales of businesses | (2.7)
Foreign currency translation adjustments during the year | 76.8
Ending balance | 6,865.1
Retail |
Goodwill [Line Items] |
Beginning balance | 4,309.0
Goodwill adjustment during measurement period | 14.9
Goodwill of acquired businesses | 121.1
Goodwill disposed of relating to sales of businesses | 0.0
Foreign currency translation adjustments during the year | 67.7
Ending balance | 4,512.7
National Programs |
Goodwill [Line Items] |
Beginning balance | 1,602.4
Goodwill adjustment during measurement period | (23.9)
Goodwill of acquired businesses | 2.9
Goodwill disposed of relating to sales of businesses | (2.7)
Foreign currency translation adjustments during the year | 3.9
Ending balance | 1,582.6
Wholesale Brokerage |
Goodwill [Line Items] |
Beginning balance | 591.5
Goodwill adjustment during measurement period | 0.0
Goodwill of acquired businesses | 1.8
Goodwill disposed of relating to sales of businesses | 0.0
Foreign currency translation adjustments during the year | 5.2
Ending balance | 598.5
Services |
Goodwill [Line Items] |
Beginning balance | 171.3
Goodwill adjustment during measurement period | 0.0
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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