COMMITMENTS AND CONTINGENCIES - Represemted Employee (Detail) $ in Millions		12 Months Ended
	Mar. 01, 2019 Work_site Number_of_union_local	Dec. 31, 2019 USD ($)	Feb. 28, 2019 Work_site Number_of_union_local
Represented Employees
Commitments and Contingencies Disclosure [Line Items]
Workforce, percentage represented by union		65.00%
Union negotiation | $		$ 7
United Steelworkers | Represented Employees
Commitments and Contingencies Disclosure [Line Items]
Workforce, percentage represented by union		80.00%
Union, work sites represented | Work_site			4
Union, number of locals represented | Number_of_union_local			5
Union, agreement term	3 years
International Brotherhood of Electrical Workers and the International Brotherhood of Teamsters | Represented Employees
Commitments and Contingencies Disclosure [Line Items]
Union, work sites represented | Work_site	2
Union, number of locals represented | Number_of_union_local	2
One to Ten Years
Commitments and Contingencies Disclosure [Line Items]
Severance, eligible pay period		7 days
Eleven Plus Years
Commitments and Contingencies Disclosure [Line Items]
Severance, additional eligible pay period		14 days
Minimum
Commitments and Contingencies Disclosure [Line Items]
Severance, termination allowance, eligible pay period		14 days
Minimum | One to Ten Years
Commitments and Contingencies Disclosure [Line Items]
Severance, service period		1 day
Minimum | Eleven Plus Years
Commitments and Contingencies Disclosure [Line Items]
Severance, service period		11 years
Maximum
Commitments and Contingencies Disclosure [Line Items]
Severance, termination allowance, eligible pay period		365 days