Intangible Assets (Tables)

6 Months Ended

Jun. 30, 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 Amount		Accumulated Amortization		Net Carrying Amount
Six Months Ended June 30, 2023
Customer relationships, beginning of period	$	1,844.8	$	(923.6)	$	921.2
Amortization expense	—		(63.8)		(63.8)
Customer relationships, end of period	$	1,844.8	$	(987.4)	$	857.4

Schedule of Amortization Expense

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

2023 (remaining)	$	63.8
2024	127.6
2025	110.2
2026	106.3
2027	106.3
Thereafter	343.2
Total	$	857.4