- DefinitionIndicates type of variable interest rate of investment.
Reference 1: http://www.xbrl.org/2003/role/disclosureRef
 -Topic 946
 -SubTopic 320
 -Name Accounting Standards Codification
 -Section S99
 -Paragraph 2
 -Subparagraph (SX 210.12-12A(Column A)(Footnote 3))
 -Publisher FASB
 -URI https://asc.fasb.org/1943274/2147477271/946-320-S99-2
Reference 2: http://www.xbrl.org/2003/role/disclosureRef
 -Topic 946
 -SubTopic 320
 -Name Accounting Standards Codification
 -Section S99
 -Paragraph 1
 -Subparagraph (SX 210.12-12(Column A)(Footnote 4))
 -Publisher FASB
 -URI https://asc.fasb.org/1943274/2147477271/946-320-S99-1
Reference 3: http://www.xbrl.org/2003/role/disclosureRef
 -Topic 946
 -SubTopic 320
 -Name Accounting Standards Codification
 -Section S99
 -Paragraph 3
 -Subparagraph (SX 210.12-12B(Column A)(Footnote 3))
 -Publisher FASB
 -URI https://asc.fasb.org/1943274/2147477271/946-320-S99-3
Reference 4: http://www.xbrl.org/2003/role/disclosureRef
 -Topic 946
 -SubTopic 320
 -Name Accounting Standards Codification
 -Section S99
 -Paragraph 6
 -Subparagraph (SX 210.12-14(Column A)(Footnote 3))
 -Publisher FASB
 -URI https://asc.fasb.org/1943274/2147477271/946-320-S99-6
| Name: | us-gaap_InvestmentVariableInterestRateTypeExtensibleEnumeration | 
| Namespace Prefix: | us-gaap_ | 
| Data Type: | enum2:enumerationSetItemType | 
| Balance Type: | na | 
| Period Type: | instant |