Goodwill allocated to our reportable segments and changes in the carrying amount of goodwill during the nine months ended September 30, 2026, consisted of the following: | | | | | | | | | | | | | | | | | | | U.S. Markets | | International | | Total | | Balance, December 31, 2025 | $ | 4,311.3 | | | $ | 948.2 | | | $ | 5,259.5 | | | Business acquisitions | 12.2 | | | 547.5 | | | 559.7 | | Purchase accounting measurement period adjustments | 0.8 | | | (2.5) | | | (1.7) | | | Foreign exchange rate adjustment | 0.5 | | | (15.4) | | | (14.9) | | | Balance, September 30, 2026 | $ | 4,324.7 | | | $ | 1,477.8 | | | $ | 5,802.5 | |
The gross and net goodwill balances at each period were as follows: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | September 30, 2026 | | December 31, 2025 | | Gross Goodwill | | Accumulated Impairment | | Net Goodwill | | Gross Goodwill | | Accumulated Impairment | | Net Goodwill | U.S. Markets | $ | 4,324.7 | | | $ | — | | | $ | 4,324.7 | | | $ | 4,311.3 | | | $ | — | | | $ | 4,311.3 | | International | 1,891.8 | | | (414.0) | | | 1,477.8 | | | 1,362.2 | | | (414.0) | | | 948.2 | | Total | $ | 6,216.5 | | | $ | (414.0) | | | $ | 5,802.5 | | | $ | 5,673.5 | | | $ | (414.0) | | | $ | 5,259.5 | |
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