Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2023

Accounting Policies [Abstract]

Schedule of Property, Plant and Equipment

Estimated Useful Lives	Years
Buildings	16 to 25
Building leasehold improvements	3 to 10
Vehicles	3 to 10
Capitalized software	3 to 5
Other machinery and equipment	3 to 10

The following table presents our property and equipment that is classified as held and used:

	December 31,
(In millions)	2023		2022
Land	$	54.3	49.9
Buildings	241.0		226.2
Leasehold improvements	291.2		271.7
Vehicles	805.0		755.2
Capitalized software(a)	269.1		237.0
DRS devices leased to customers	278.6		190.3
Other machinery and equipment	694.2		666.4
	2,633.4		2,396.7
Accumulated depreciation and amortization	(1,620.1)		(1,461.4)
Property and equipment, net	$	1,013.3	935.3

(a)Amortization of capitalized software costs included in continuing operations was $15.5 million in 2023, $16.1 million in 2022 and $14.5 million in 2021.