v3.25.2
Goodwill and Other Intangible Assets (Tables)
6 Months Ended
Jun. 30, 2025
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of intangible assets and goodwill
The following table presents the economic life, acquisition date fair value, accumulated amortization and net carrying value for other intangible assets and goodwill as of June 30, 2025 and December 31, 2024:
$ in MillionsWeighted Average Economic
 Life
(in years)
June 30, 2025December 31, 2024
Acquisition Date Fair ValueAccumulated AmortizationNet Carrying ValueAcquisition Date Fair ValueAccumulated AmortizationNet Carrying Value
Goodwill:
ArkN/A$116.8 $ $116.8 $116.8 $— $116.8 
KuduN/A7.6  7.6 7.6 — 7.6 
BambooN/A270.4  270.4 270.4 — 270.4 
Other Operations (1)
N/A139.8  139.8 44.4 — 44.4 
Total goodwill534.6  534.6 439.2 — 439.2 
Other intangible assets:
Ark
Underwriting capacityN/A175.7  175.7 175.7 — 175.7 
Kudu
Trade names7.02.2 2.0 .2 2.2 1.8 .4 
Bamboo
Trade names10.023.5 3.5 20.0 23.5 2.3 21.2 
Agency relationships6.072.4 18.1 54.3 72.4 12.1 60.3 
Developed technology3.04.7 2.4 2.3 4.7 1.6 3.1 
Other 0.3.4 .4  .4 .4 — 
Subtotal101.024.476.6101.0 16.4 84.6 
Other Operations (1)
Trade names13.313.3 6.3 7.0 13.3 5.6 7.7 
Customer relationships10.924.8 14.9 9.9 24.8 13.6 11.2 
Other
11.83.1 1.7 1.4 3.1 1.6 1.5 
Subtotal41.2 22.9 18.3 41.2 20.8 20.4 
Total other intangible assets320.1 49.3 270.8 320.1 39.0 281.1 
Total goodwill and other intangible assets
$854.7 $49.3 $805.4 $759.3 $39.0 $720.3 
(1) The relative fair values of goodwill and other intangible assets recognized in connection with the Enterprise Solutions Transaction had not yet been finalized; accordingly, all amounts were reflected as goodwill as of June 30, 2025. See Note 2 — “Significant Transactions.”
The following tables present the change in goodwill and other intangible assets for the three and six months ended June 30, 2025 and 2024:

Three Months Ended June 30,
20252024
MillionsGoodwillOther Intangible AssetsTotal Goodwill and Other Intangible AssetsGoodwillOther Intangible AssetsTotal Goodwill and Other Intangible Assets
Beginning balance$439.2 $275.9 $715.1 $439.2 $297.4 $736.6 
Acquisition of businesses (1)
95.4  95.4 — — — 
Amortization (5.1)(5.1)— (5.6)(5.6)
Ending balance$534.6 $270.8 $805.4 $439.2 $291.8 $731.0 
(1) During the three months ended June 30, 2025, amounts relate to the Enterprise Solutions Transaction, for which the relative fair values of goodwill and other intangible assets had not yet been finalized; accordingly, all amounts were reflected as goodwill as of June 30, 2025. See Note 2 — “Significant Transactions.”
Six Months Ended June 30,
20252024
MillionsGoodwillOther Intangible AssetsTotal Goodwill and Other Intangible AssetsGoodwillOther Intangible AssetsTotal Goodwill and Other Intangible Assets
Beginning balance$439.2 $281.1 $720.3 $168.8 $201.8 $370.6 
Acquisitions of businesses (1)
95.4  95.4 270.4 101.0 371.4 
Acquisitions of intangible assets (2)
   — .3 .3 
Amortization (10.3)(10.3)— (11.3)(11.3)
Ending balance$534.6 $270.8 $805.4 $439.2 $291.8 $731.0 
(1) During the six months ended June 30, 2025, amounts relate to the Enterprise Solutions Transaction, for which the relative fair values of goodwill and other intangible assets had not yet been finalized; accordingly, all amounts were reflected as goodwill as of June 30, 2025. During the six months ended June 30, 2024, amounts relate to the Bamboo Transaction, for which the relative fair values of goodwill and other intangible assets had not yet been finalized as of June 30, 2024. See Note 2 — “Significant Transactions.”
(2) Relates to acquisitions within Other Operations.