Other Operating Credits and Charges, Net Non-Operating Income and Expense (Details) - USD ($)	1 Months Ended	3 Months Ended	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Interest Expense			$ 14,000,000	$ 15,000,000	$ 17,000,000
Amortization of financing costs and discounts			1,000,000	2,000,000	2,000,000
Interest Costs Capitalized Adjustment			5,000,000	3,000,000	0
Interest expense, net of capitalized interest			(11,000,000)	(14,000,000)	(19,000,000)
Investment Income, Interest and Dividend			14,000,000	1,000,000	2,000,000
Realized Investment Gains (Losses)			0	0	3,000,000
Interest Income, Other			0	0	(1,000,000)
Investment income			14,000,000	1,000,000	4,000,000
Net Periodic Defined Benefits Expense (Reversal of Expense), Excluding Service Cost Component			6,000,000	1,000,000	1,000,000
Foreign Currency Transaction Gain (Loss), Realized			(11,000,000)	(8,000,000)	5,000,000
Loss on early debt extinguishment	$ 11,000,000		0	11,000,000	0
Loss due to settlement			82,000,000	2,000,000	0
Gain on Acquisition			2,000,000		0
Other nonoperating items			(97,000,000)	(22,000,000)	4,000,000
Redemption Premium	9,000,000			9,000,000
Write off of deferred debt issuance cost	$ 2,000,000			2,000,000
Severance Costs			7,000,000	1,000,000	5,000,000
Insurance Recoveries			15,000,000
Insurance and environmental recoveries			2,000,000	4,000,000	(3,000,000)
Proceeds from Insurance Settlement, Operating Activities			15,000,000	4,000,000	0
Reorganization Value, Net Realizable Value of Asset Dispositions					8,000,000
Canadian wage subsidies			$ 0	$ 0	$ 6,000,000
Entekra [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Gain on Acquisition		$ 0