Income Taxes (Tax Returns) (Details) - 9 months ended Sep. 30, 2020 R$ in Millions, $ in Millions	BRL (R$)	USD ($)
Brazil
Income Tax Examination
Net adjustments of additional taxes, including interest and penalties	R$ 734	$ 131

Estimated amount of loss resulting from an adverse tax position.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (d)(3)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration