Restructuring Charges (Details) $ in Millions	12 Months Ended
	Dec. 31, 2023 USD ($) ft²	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Restructuring Cost and Reserve [Line Items]
Severance and termination costs	$ 0.4	$ (0.1)	$ 0.4
Lease Restructuring Cost	(1.2)	85.4	6.3
Lease restructuring costs		85.4	6.3
Other Restructuring Costs	0.9	17.1	3.9
Restructuring Charges	0.1	102.4	10.6
Lease impairment costs 2020 plan	(0.3)	1.0	6.3
Other restructuring costs 2020 Plan	0.1	2.9	3.9
Other Restructuring Costs 2022 Real Estate Actions	0.8	14.2
Restructuring Charges 2020 Plan Reserve	0.6	2.3	9.4	$ 74.6
Restructuring Charges 2020 Plan	0.2	3.8	10.6
Restructuring Charges 2022 Real Estate Actions Reserve	0.0	0.0
Restructuring Charges 2022 Real Estate Actions	$ (0.1)	98.6
Area of Real Estate Property | ft²	500,000
Operating Lease, Impairment Loss 2022 Real Estate Action	$ (0.9)	84.4
MD&E
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	(1.3)	69.1	0.1
Lease impairment costs 2020 plan	(0.3)	0.0	(0.9)
Restructuring Charges 2020 Plan	(0.3)	0.1	0.1
Restructuring Charges 2022 Real Estate Actions	(1.0)	69.0
Operating Lease, Impairment Loss 2022 Real Estate Action	(1.0)	54.3
IA&C
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	0.2	28.7	2.6
Lease impairment costs 2020 plan	0.0	7.0	(0.1)
Restructuring Charges 2020 Plan	0.5	7.7	2.6
Restructuring Charges 2022 Real Estate Actions	(0.3)	21.0
Operating Lease, Impairment Loss 2022 Real Estate Action	(0.5)	22.3
SC&E
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	1.1	3.8	10.0
Lease impairment costs 2020 plan	0.0	(5.9)	7.3
Restructuring Charges 2020 Plan	0.0	(4.2)	10.0
Restructuring Charges 2022 Real Estate Actions	1.1	8.0
Operating Lease, Impairment Loss 2022 Real Estate Action	0.4	7.0
Corporate and Other
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	0.1	0.8	(2.1)
Lease impairment costs 2020 plan	0.0	(0.1)	0.0
Restructuring Charges 2020 Plan	0.0	0.2	(2.1)
Restructuring Charges 2022 Real Estate Actions	0.1	0.6
Operating Lease, Impairment Loss 2022 Real Estate Action	0.2	0.8
Non-cash Items [Member]
Restructuring Cost and Reserve [Line Items]
Severance and termination costs	0.0	0.0	0.3
Lease impairment costs 2020 plan	(0.3)	1.0	6.3
Other restructuring costs 2020 Plan	0.1	2.9	3.2
Other Restructuring Costs 2022 Real Estate Actions	0.2	13.5
Restructuring Charges 2020 Plan	(0.2)	3.9	9.8
Restructuring Charges 2022 Real Estate Actions	(0.7)	97.9
Operating Lease, Impairment Loss 2022 Real Estate Action	(0.9)	84.4
Cash Payments [Member]
Restructuring Cost and Reserve [Line Items]
Severance and termination costs	2.1	7.0	65.3
Lease impairment costs 2020 plan	0.0	0.0	0.0
Other restructuring costs 2020 Plan	0.0	0.0	0.7
Other Restructuring Costs 2022 Real Estate Actions	0.6	0.7
Restructuring Charges 2020 Plan	2.1	7.0	66.0
Restructuring Charges 2022 Real Estate Actions	0.6	0.7
Operating Lease, Impairment Loss 2022 Real Estate Action	0.0	0.0
Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Other Restructuring Costs 2022 Real Estate Actions Reserve	0.0	0.0
Other restructuring costs reserve 2020 plan	0.0	0.0	0.0	0.0
Lease impairment costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	0.0	0.0
Lease impairment costs reserve 2020 Plan	0.0	0.0	0.0	0.0
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	$ 0.6	$ 2.3	$ 9.4	$ 74.6