FAIR VALUE- Assets and Liabilities (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Assets:
Available-for-sale securities		$ 4.2
Foreign exchange forward contracts	$ 2.7	2.8
Total	2.7	7.0
Liabilities:
Foreign exchange forward contracts	0.0	6.0
Total	0.0	6.0
Level 1
Assets:
Available-for-sale securities		4.2
Foreign exchange forward contracts	0.0	0.0
Total	0.0	4.2
Liabilities:
Foreign exchange forward contracts	0.0	0.0
Total	0.0	0.0
Level 2
Assets:
Available-for-sale securities		0.0
Foreign exchange forward contracts	2.7	2.8
Total	2.7	2.8
Liabilities:
Foreign exchange forward contracts	0.0	6.0
Total	$ 0.0	$ 6.0