Restructuring (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Restructuring Cost and Reserve [Line Items]
Restructuring and related activities, completion period	18 months
Restructuring	$ 103,323,000	$ 11,981,000	$ 22,247,000
Write off capitalized internal use software	6,200,000
Significant Unobservable Inputs (Level 3)
Restructuring Cost and Reserve [Line Items]
Right-of-use impairment loss		8,900,000
2021 Restructuring Program
Restructuring Cost and Reserve [Line Items]
Restructuring	103,323,000	$ 0	$ 0
2021 Restructuring Program | Impairment of Operating Lease Right of Use Assets and Property and Equipment
Restructuring Cost and Reserve [Line Items]
Restructuring	29,400,000
2021 Restructuring Program | Impairment of Operating Lease Right of Use Assets
Restructuring Cost and Reserve [Line Items]
Restructuring	20,900,000
2021 Restructuring Program | Impairment of Property and Equipment
Restructuring Cost and Reserve [Line Items]
Restructuring	8,500,000
2021 Restructuring Program | Minimum
Restructuring Cost and Reserve [Line Items]
Restructuring and related activities, expected cost	130,000,000
2021 Restructuring Program | Minimum | Employee severance and related costs
Restructuring Cost and Reserve [Line Items]
Restructuring and related activities, expected cost	65,000,000
2021 Restructuring Program | Minimum | Impairment of ROU and other assets
Restructuring Cost and Reserve [Line Items]
Restructuring and related activities, expected cost	40,000,000
2021 Restructuring Program | Minimum | Termination contract costs
Restructuring Cost and Reserve [Line Items]
Restructuring and related activities, expected cost	20,000,000
2021 Restructuring Program | Minimum | Impairment of intangible assets
Restructuring Cost and Reserve [Line Items]
Restructuring and related activities, expected cost	5,000,000
2021 Restructuring Program | Maximum
Restructuring Cost and Reserve [Line Items]
Restructuring and related activities, expected cost	240,000,000
2021 Restructuring Program | Maximum | Employee severance and related costs
Restructuring Cost and Reserve [Line Items]
Restructuring and related activities, expected cost	90,000,000
2021 Restructuring Program | Maximum | Impairment of ROU and other assets
Restructuring Cost and Reserve [Line Items]
Restructuring and related activities, expected cost	75,000,000
2021 Restructuring Program | Maximum | Termination contract costs
Restructuring Cost and Reserve [Line Items]
Restructuring and related activities, expected cost	35,000,000
2021 Restructuring Program | Maximum | Impairment of intangible assets
Restructuring Cost and Reserve [Line Items]
Restructuring and related activities, expected cost	$ 40,000,000