LONG-TERM DEBT (Details) - USD ($) $ in Millions	1 Months Ended
	Nov. 30, 2021	Dec. 31, 2021	Dec. 31, 2020
Long-term debt
Total		$ 1,675.0	$ 1,625.0
Unamortized debt issuance costs		(14.2)	(10.7)
Unamortized discount, net		(1.5)	(0.8)
Long-term debt, including current portion		1,659.3	1,613.5
Current portion of long-term debt		0.0	(400.0)
Long-term debt		1,659.3	1,213.5
Future maturities of long-term debt
2022		0.0
2023		0.0
2024		0.0
2025		0.0
2026		0.0
Thereafter		1,675.0
Total		1,675.0	1,625.0
Total Liabilities
Long-term debt
Finance lease obligations		$ 31.3	31.3
Senior notes (unsecured), 3.35% due 2021
Long-term debt
Interest rate	3.35%	3.35%
Senior notes (unsecured)		$ 0.0	400.0
Repayments of unsecured debt	$ 400.0
Senior Notes (unsecured), 6.08% due 2028
Long-term debt
Interest rate		6.08%
Senior notes (unsecured)		$ 50.0	50.0
Senior Notes (unsecured), 5.55% due 2036
Long-term debt
Interest rate		5.55%
Senior notes (unsecured)		$ 125.0	125.0
Senior Notes (unsecured), 3.671% due 2042
Long-term debt
Interest rate		3.671%
Senior notes (unsecured)		$ 300.0	300.0
Senior Notes (unsecured), 4.752% due 2044
Long-term debt
Interest rate		4.752%
Senior notes (unsecured)		$ 450.0	450.0
Senior Notes (unsecured), 3.30% due 2049
Long-term debt
Interest rate		3.30%
Senior notes (unsecured)		$ 300.0	300.0
Senior Notes (unsecured), 2.85% due 2051
Long-term debt
Interest rate	2.85%	2.85%
Senior notes (unsecured)		$ 450.0	$ 0.0
Proceeds from issuance of debt	$ 450.0