Income Taxes (Significant Components Of Deferred Tax Liabilities And Assets) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Document Period End Date	Dec. 31, 2019
Deferred tax liabilities
Property, plant, and equipment	$ 1,012	$ 944
Deferred Tax Liabilities, Intangible Assets	286	130
Deferred Tax Liabilities, Leasing Arrangements	220	0
Equity in earnings of affiliates	72	70
Deferred Tax Liabilities, Inventory	32	0
Debt exchange	80	81
Deferred Tax Liabilities, Deferred Expense, Reserves and Accruals	20	25
Other	109	83
Deferred Tax Liabilities, Gross	1,831	1,333
Deferred tax assets
Pension and postretirement benefits	155	122
Deferred tax assets, leasing arrangements	225	0
Stock compensation	62	55
Foreign tax loss carryforwards	411	313
Capital loss carryforwards	62	55
State tax attributes	74	74
Deferred Tax Assets, Unrealized Currency Losses	0	48
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Reserves	0	18
Other	147	56
Gross deferred tax assets	1,136	741
Valuation allowances	(325)	(289)
Net deferred tax assets	811	452
Deferred Tax Liabilities, Net, Classification [Abstract]
Net deferred tax liabilities	(1,020)	(881)
Domestic Tax Authority [Member]
Deferred Tax Liabilities, Net, Classification [Abstract]
Noncurrent Liabilities	(969)	(929)
Foreign [Member]
Deferred Tax Liabilities, Net, Classification [Abstract]
Noncurrent assets	174	186
Noncurrent Liabilities	$ (225)	$ (138)