Restructuring Charges (Details) $ in Millions	12 Months Ended
	Dec. 31, 2022 USD ($) ft²	Dec. 31, 2021 USD ($) ft²	Dec. 31, 2020 USD ($)
Restructuring Cost and Reserve [Line Items]
Severance and termination costs	$ (0.1)	$ 0.4	$ 140.4
Lease Restructuring Cost	85.4	6.3	256.0
Lease restructuring costs		6.3	209.9
Other Restructuring Costs	17.1	3.9	17.4
Restructuring Charges	102.4	10.6	413.8
Restructuring Reserve		9.4	74.6
Lease impairment costs 2020 plan	1.0
Other restructuring costs 2020 Plan	2.9
Other Restructuring Costs 2022 Real Estate Actions	14.2
Restructuring Charges 2020 Plan Reserve	2.3	$ 9.4
Restructuring Charges 2020 Plan	3.8
Restructuring Charges 2022 Real Estate Actions Reserve	0.0
Restructuring Charges 2022 Real Estate Actions	$ 98.6
Area of Real Estate Property | ft²	500,000	1,700,000
Operating Lease, Impairment Loss 2022 Real Estate Action	$ 84.4
MD&E
Restructuring Cost and Reserve [Line Items]
Lease restructuring costs		$ (0.9)	89.3
Restructuring Charges		0.1	159.9
Lease impairment costs 2020 plan	0.0
Restructuring Charges 2020 Plan	0.1
Restructuring Charges 2022 Real Estate Actions	64.1
Operating Lease, Impairment Loss 2022 Real Estate Action	54.3
IA&C
Restructuring Cost and Reserve [Line Items]
Lease restructuring costs		(0.1)	101.1
Restructuring Charges		2.6	148.1
Lease impairment costs 2020 plan	7.0
Restructuring Charges 2020 Plan	7.7
Restructuring Charges 2022 Real Estate Actions	25.9
Operating Lease, Impairment Loss 2022 Real Estate Action	22.3
SC&E
Restructuring Cost and Reserve [Line Items]
Lease restructuring costs		7.3	59.8
Restructuring Charges		10.0	88.7
Lease impairment costs 2020 plan	(5.9)
Restructuring Charges 2020 Plan	(4.2)
Restructuring Charges 2022 Real Estate Actions	8.0
Operating Lease, Impairment Loss 2022 Real Estate Action	7.0
Corporate and Other
Restructuring Cost and Reserve [Line Items]
Lease restructuring costs		0.0	5.8
Restructuring Charges		(2.1)	17.1
Lease impairment costs 2020 plan	(0.1)
Restructuring Charges 2020 Plan	0.2
Restructuring Charges 2022 Real Estate Actions	0.6
Operating Lease, Impairment Loss 2022 Real Estate Action	0.8
Non-cash Items [Member]
Restructuring Cost and Reserve [Line Items]
Severance and termination costs	0.0	0.3	4.5
Lease Restructuring Cost			256.0
Lease restructuring costs		6.3
Other Restructuring Costs		3.2	5.1
Restructuring Charges		9.8	265.6
Lease impairment costs 2020 plan	1.0
Other restructuring costs 2020 Plan	2.9
Other Restructuring Costs 2022 Real Estate Actions	13.5
Restructuring Charges 2020 Plan	3.9
Restructuring Charges 2022 Real Estate Actions	97.9
Operating Lease, Impairment Loss 2022 Real Estate Action	84.4
Cash Payments [Member]
Restructuring Cost and Reserve [Line Items]
Severance and termination costs	7.0	65.3	61.3
Lease Restructuring Cost			0.0
Lease restructuring costs		0.0
Other Restructuring Costs		0.7	12.3
Restructuring Charges		66.0	73.6
Lease impairment costs 2020 plan	0.0
Other restructuring costs 2020 Plan	0.0
Other Restructuring Costs 2022 Real Estate Actions	0.7
Restructuring Charges 2020 Plan	7.0
Restructuring Charges 2022 Real Estate Actions	0.7
Operating Lease, Impairment Loss 2022 Real Estate Action	0.0
Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve		0.0	0.0
Other Restructuring Costs 2022 Real Estate Actions Reserve	0.0
Other restructuring costs reserve 2020 plan	0.0	0.0
Lease impairment costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	0.0	0.0	0.0
Lease impairment costs reserve 2020 Plan	0.0	0.0
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	$ 2.3	$ 9.4	$ 74.6