Credit Losses

12 Months Ended

Dec. 31, 2023

Credit Loss [Abstract]

Credit Losses

CREDIT LOSSES

We account for credit losses under ASC 326 using an expected credit loss impairment model for financial instruments, including trade receivables, retainage receivables and contract assets (unbilled receivables). We consider information such as historical experience, present economic conditions and other relevant factors management considers relevant to estimate expected credit losses.

Changes in our allowance for credit losses were as follows (in millions):

January 1, 2021	$	8.8
Current period provision	2.2
Recoveries collected and additions	0.6
Amounts written off	(2.9)
December 31, 2021	$	8.7
Current period provision	4.1
Recoveries collected and additions	0.3
Amounts written off	(3.6)
December 31, 2022	$	9.5
Current period provision	6.3
Recoveries collected and additions	0.5
Amounts written off	(5.1)
December 31, 2023	$	11.2