v3.23.1
Intangible Assets (Tables)
 3 Months Ended
Mar. 31, 2023
Goodwill and Intangible Assets Disclosure [Abstract]  
Summary of Changes in Carrying Value The following table represents our change in carrying value of intangible assets (in millions):
Gross Carrying AmountAccumulated AmortizationNet Carrying Amount
Three Months Ended March 31, 2023
Customer relationships, beginning of period$1,844.8 $(923.6)$921.2 
Amortization expense— (31.9)(31.9)
Customer relationships, end of period$1,844.8 $(955.5)$889.3 
Schedule of Amortization Expense
The following table summarizes our estimated aggregate amortization expense for the next five years and thereafter (in millions):

2023 (remaining)$95.7 
2024127.6 
2025110.2 
2026106.3 
2027106.3 
Thereafter343.2 
Total$889.3