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Non-operating income, net
 12 Months Ended
Dec. 31, 2022
Non-operating (loss) income, net [Abstract]  
Non-operating Income, Net Non-operating Income (Loss), Net
The following table presents the components of Non-operating income (loss), net:
Year Ended December 31,
202220212020
(In millions)
Interest income$14.9 $0.6 $7.8 
Loss on extinguishment of debt— (2.1)— 
Gain on sale of business— — 6.4 
Transition services income— — 2.1 
Other, net(2.5)0.2 (0.1)
Total non-operating income (loss), net$12.4 $(1.3)$16.2 
Interest income is earned principally from the Company’s surplus cash balances and marketable securities. The increase in interest income in 2022 reflects higher interest rates on our investments in debt securities. The redemption of the 2023 senior notes in 2021 resulted in a loss on debt extinguishment of $2.1 million related to the unamortized debt issuance costs on the notes. Gain on sale of business and transition services income in 2020 relates to the sale of the Company’s security services customer contracts.