Long-term Employee Benefits - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Percent of actuarial losses in excess of market value or PBO to be Included in periodic benefit costs (exceeding)	10.00%
Defined contribution plan, employer contribution amount	$ 42.2	$ 48.7	$ 43.8
Europe
Defined Benefit Plan Disclosure [Line Items]
Pension benefit obligation, percentage by region	85.00%
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Rate of return on plan assets to determine net cost	3.55%
Estimated future employer contribution	$ 5.5