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Goodwill and Intangible Assets (Tables)
9 Months Ended
Sep. 30, 2020
Goodwill and Intangible Assets Disclosure [Abstract]  
Net Carrying Amount of Other Intangible Assets
The following table is a summary of the net carrying amount of other intangible assets:
(millions)September 30, 2020September 30, 2019December 31, 2019
Intangible assets subject to amortization$173.1 $230.5 $215.9 
Indefinite-lived intangible assets1
12.4 12.4 12.4 
Total$185.5 $242.9 $228.3 
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 State insurance licenses were previously subject to amortization under superseded accounting guidance and have $0.6 million of accumulated amortization for all periods presented.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
Intangible assets subject to amortization consisted of the following:
(millions)September 30, 2020September 30, 2019December 31, 2019
CategoryGross
Carrying
Amount
Accumulated
Amortization
Net
Carrying
Amount
Gross
Carrying
Amount
Accumulated
Amortization
Net
Carrying
Amount
Gross
Carrying
Amount
Accumulated
Amortization
Net
Carrying
Amount
Policies in force$256.2 $201.3 $54.9 $256.2 $164.7 $91.5 $256.2 $173.9 $82.3 
Agency relationships159.2 62.6 96.6 159.2 51.2 108.0 159.2 54.0 105.2 
Software rights 69.1 47.5 21.6 79.1 48.1 31.0 79.1 50.7 28.4 
Trade name
34.8 34.8 34.8 34.8 
Total$484.5 $311.4 $173.1 $529.3 $298.8 $230.5 $529.3 $313.4 $215.9