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Goodwill and Intangible Assets (Tables)
 9 Months Ended
Sep. 30, 2023
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Indefinite-Lived Intangible Assets
The following table is a summary of the net carrying amount of other intangible assets:
(millions)September 30, 2023September 30, 2022December 31, 2022
Intangible assets subject to amortization$62.5 $79.4 $73.9 
Indefinite-lived intangible assets1
12.4 12.4 12.4 
Total$74.9 $91.8 $86.3 
1 Indefinite-lived intangible assets are comprised of state insurance and agent licenses. State insurance licenses were previously subject to amortization under superseded accounting guidance and have $0.6 million of accumulated amortization for all periods presented.
Intangible Assets Subject to Amortization
The following table is a summary of the net carrying amount of other intangible assets:
(millions)September 30, 2023September 30, 2022December 31, 2022
Intangible assets subject to amortization$62.5 $79.4 $73.9 
Indefinite-lived intangible assets1
12.4 12.4 12.4 
Total$74.9 $91.8 $86.3 
1 Indefinite-lived intangible assets are comprised of state insurance and agent licenses. State insurance licenses were previously subject to amortization under superseded accounting guidance and have $0.6 million of accumulated amortization for all periods presented.
Intangible assets subject to amortization consisted of the following:
(millions)September 30, 2023September 30, 2022December 31, 2022
CategoryGross
Carrying
Amount		Accumulated
Amortization		Net
Carrying
Amount		Gross
Carrying
Amount		Accumulated
Amortization		Net
Carrying
Amount		Gross
Carrying
Amount		Accumulated
Amortization		Net
Carrying
Amount
Agency relationships$159.2 $96.7 $62.5 $159.2 $85.3 $73.9 $159.2 $88.1 $71.1 
Software rights 69.1 69.1 0 69.1 64.8 4.3 69.1 67.0 2.1 
Trade name3.6 3.6 0 3.6 2.4 1.2 3.6 2.9 0.7 
Total$231.9 $169.4 $62.5 $231.9 $152.5 $79.4 $231.9 $158.0 $73.9