Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2024

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 Amount		Accumulated Amortization		Net Carrying Amount
Three Months Ended March 31, 2024
Customer relationships, beginning of period	$	1,844.8	$	(1,051.2)	$	793.6
Amortization expense	—		(31.8)		(31.8)
Customer relationships, end of period	$	1,844.8	$	(1,083.0)	$	761.8

Amortization expense was $31.8 million and $31.9 million for the three months ended March 31, 2024 and 2023, respectively.

Schedule of Amortization Expense

The following table summarizes our estimated aggregate amortization expense for the next five years and thereafter (in millions):

2024 (remaining)	$	95.8
2025	110.2
2026	106.3
2027	106.3
2028	106.3
Thereafter	236.9
Total	$	761.8