SIGNIFICANT ACCOUNTING POLICIES - Corrections to the Consolidated Statement Of Cash Flows (Details) - USD ($) $ in Millions	3 Months Ended						9 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Sep. 30, 2020
Cash flows from operating activities:
Net income	$ 84.0	$ 96.0	$ 112.0	$ 48.0	$ (92.0)	$ (134.0)	$ 292.0	$ (178.0)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Other non-cash expense (income)							13.0	7.0
Changes in operating assets and liabilities, net of acquisitions:
Accounts and notes receivable-trade, net							(89.0)	150.0
Inventories, net							(88.0)	73.0
Prepaid expenses and other current assets							(24.0)	50.0
Accounts payable							(45.0)	(62.0)
Accrued liabilities							70.0	(66.0)
Income taxes							6.0	(9.0)
Other noncurrent liabilities							22.0	(14.0)
Net cash provided by operating activities							435.0	385.0
Cash flows from financing activities:
Other financing activities, net							(11.0)	(17.0)
Net cash (used in) provided by financing activities							(257.0)	491.0
As Previously Issued
Cash flows from operating activities:
Net income	103.0			54.0			319.0	(182.0)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Other non-cash expense (income)							12.0	9.0
Changes in operating assets and liabilities, net of acquisitions:
Accounts and notes receivable-trade, net							(98.0)	149.0
Inventories, net							(82.0)	74.0
Prepaid expenses and other current assets							(27.0)	50.0
Accounts payable							(39.0)	(65.0)
Accrued liabilities							41.0	(73.0)
Income taxes							11.0	(10.0)
Other noncurrent liabilities							20.0	(14.0)
Net cash provided by operating activities							435.0	372.0
Cash flows from financing activities:
Other financing activities, net							(11.0)	(4.0)
Net cash (used in) provided by financing activities							(257.0)	504.0
Adjustment
Cash flows from operating activities:
Net income	$ (19.0)			$ (6.0)			(27.0)	4.0
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Other non-cash expense (income)							1.0	(2.0)
Changes in operating assets and liabilities, net of acquisitions:
Accounts and notes receivable-trade, net							9.0	1.0
Inventories, net							(6.0)	(1.0)
Prepaid expenses and other current assets							3.0	0.0
Accounts payable							(6.0)	3.0
Accrued liabilities							29.0	7.0
Income taxes							(5.0)	1.0
Other noncurrent liabilities							2.0	0.0
Net cash provided by operating activities							0.0	13.0
Cash flows from financing activities:
Other financing activities, net							0.0	(13.0)
Net cash (used in) provided by financing activities							$ 0.0	$ (13.0)