Long-term Employee Benefits - Schedule of Effect of Significant Unobservable Inputs, Changes in Plan Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Change in plan assets:
Fair value of plan assets at beginning of year	$ 380.9
Fair value of plan assets at end of year	260.0	$ 380.9
Level 3
Change in plan assets:
Fair value of plan assets at beginning of year	130.4	143.5
Change in unrealized (loss) gain	(18.7)	(9.7)
Purchases, sales, issues and settlements	(1.2)	(3.4)
Fair value of plan assets at end of year	110.5	130.4
Private market securities and other | Level 3
Change in plan assets:
Fair value of plan assets at beginning of year	120.2	133.8
Change in unrealized (loss) gain	(18.0)	(10.1)
Purchases, sales, issues and settlements	(0.7)	(3.5)
Fair value of plan assets at end of year	101.5	120.2
Debt and equity | Level 3
Change in plan assets:
Fair value of plan assets at beginning of year	9.9	9.4
Change in unrealized (loss) gain	(0.7)	0.4
Purchases, sales, issues and settlements	(0.5)	0.1
Fair value of plan assets at end of year	8.7	9.9
Real estate | Level 3
Change in plan assets:
Fair value of plan assets at beginning of year	0.3	0.3
Change in unrealized (loss) gain	0.0	0.0
Purchases, sales, issues and settlements	0.0	0.0
Fair value of plan assets at end of year	$ 0.3	$ 0.3