Restructuring - Narrative (Details) - 2019 Restructuring Plan	9 Months Ended
	Sep. 30, 2021
Restructuring Cost and Reserve [Line Items]
Pre-tax charge expected to be paid in cash	75.00%
Severance and employee related costs
Restructuring Cost and Reserve [Line Items]
Percentage of aggregate restructuring charge	65.00%
Facilities and related costs
Restructuring Cost and Reserve [Line Items]
Percentage of aggregate restructuring charge	20.00%
Other costs
Restructuring Cost and Reserve [Line Items]
Percentage of aggregate restructuring charge	15.00%