DERIVATIVE FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS (Details)	3 Months Ended
	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($) Bcf
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative, Nonmonetary Notional Amount | Bcf		13.2
Premiums recorded in other current assets on natural gas contracts held		$ 9,500,000
Fair Value Assets, Transfers between Levels	$ 0
Corporate bonds in other assets	7,000,000	6,900,000
Treasury notes in other assets	3,200,000	3,500,000
Long-term Debt	3,700,000,000
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair value, natural gas call options		2,300,000
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Long-term Debt, Fair Value	$ 3,700,000,000	$ 3,900,000,000