Restructuring and Related Activities (Details) $ in Millions	12 Months Ended
	Dec. 31, 2022 USD ($) ft²	Dec. 31, 2021 USD ($) ft² numberOfPeople	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
Other Restructuring Costs	17.1	3.9	17.4
Restructuring Charges	$ 102.4	10.6	413.8
Restructuring Reserve		$ 9.4	74.6
Restructuring and Related Cost, Number of Positions Eliminated | numberOfPeople		1,520
Restructuring and Related Cost, Number of Positions Eliminated, Inception to Date Percent		3.00%
Area of Real Estate Property | ft²	500,000	1,700,000
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
Other Restructuring Costs		3.2	5.1
Restructuring Charges		9.8	265.6
Cash Payments [Member]
Restructuring Cost and Reserve [Line Items]
Severance and termination costs	7.0	65.3	61.3
Lease Restructuring Cost			0.0
Other Restructuring Costs		0.7	12.3
Restructuring Charges		66.0	73.6
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	2.3	9.4	74.6
Lease impairment costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	$ 0.0	0.0	0.0
Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve		$ 0.0	$ 0.0