Long-term Employee Benefits - Schedule of Net Benefit Cost (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Changes in plan assets and benefit obligations recognized in other comprehensive income:
Net actuarial (gain) loss, net	$ (37.0)	$ 25.3	$ 46.1
Pension Plan
Net periodic benefit cost:
Service cost	7.6	7.6	7.2
Interest cost	7.7	9.7	13.1
Expected return on plan assets	(13.6)	(12.8)	(13.9)
Amortization of actuarial loss, net	4.9	3.4	1.9
Amortization of prior service credit	(0.1)	0.0	(0.1)
Curtailment gain	0.0	(4.2)	(2.3)
Settlement loss	0.0	2.3	1.1
Special termination benefit loss	0.4	1.5	0.3
Net periodic benefit cost	6.9	7.5	7.3
Changes in plan assets and benefit obligations recognized in other comprehensive income:
Net actuarial (gain) loss, net	(32.1)	28.4	46.7
Amortization of actuarial loss, net	(4.9)	(3.4)	(1.9)
Prior service credit	0.0	(0.3)	0.0
Amortization of prior service credit	0.1	0.0	0.1
Curtailment gain	0.0	4.2	2.3
Settlement loss	0.0	(2.3)	(1.1)
Other adjustments	(0.1)	(1.3)	0.0
Total (gain) loss recognized in other comprehensive income	(37.0)	25.3	46.1
Total recognized in net periodic benefit cost and comprehensive income	$ (30.1)	$ 32.8	$ 53.4