Restructuring and Severance - Summary of Restructuring Activity (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2025	Mar. 31, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Restructuring Cost and Reserve [Line Items]
Beginning Balance	$ 3.9	$ 40.4		$ 40.4
Charges	(0.2)	3.7	$ (0.3)	3.5	$ (0.1)
Payments	(0.5)	(40.2)
Reversals	(0.2)
Ending Balance	3.2	3.9		3.2
Corporate [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance	0.1	1.2		1.2
Charges		0.0
Payments	0.0	(1.1)
Reversals	0.0
Ending Balance	0.1	0.1		0.1
Network [Member] | Operating Segments [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance	3.8	39.2		39.2
Charges	(0.2)	3.7	$ (0.3)	3.5	$ (0.1)
Payments	(0.5)	(39.1)
Reversals	(0.2)
Ending Balance	$ 3.1	$ 3.8		$ 3.1