SUPPLEMENTARY INFORMATION Schedule of Other Operating Cost and Expense, by Component (Details) - Other Operating Income (Expense) [Member] - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Property Costs, net of impairment [Member]
Business Interruption Loss [Line Items]
Insurance Recoveries	$ 0	$ 0	$ 0	$ 7
Business interruption and clean up costs, net [Member]
Business Interruption Loss [Line Items]
Insurance Recoveries	$ 0	$ 0	$ 0	$ 8

The amount recovered from insurance. These recoveries reduce costs and losses that are reported as a separate line item under operating expenses.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.3)
-URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227

Name:	us-gaap_InsuranceRecoveries
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration