| Component: (Network and Table) | |
|---|---|
| Network | 
                      01-Balance Sheet 
                     (http://www.xbrlsite.com/sfac6/role/BalanceSheet) 
                   | 
               
| Table | (Implied) | 
| # | Label | Report Element Class | Period Type | Balance | Name | 
|---|---|---|---|---|---|
| 1 | 
                         01-Balance Sheet [Table] 
                      | 
                     (Implied) | |||
| 2 | 
                         Balance Sheet [Arithmetic Expression] 
                      | 
                     [Abstract] | sfac6:BalanceSheetSet | ||
| 3 | 
                         Assets 
                      | 
                     [Concept] Monetary | As Of | Debit | sfac6:Assets | 
| 4 | 
                         Liabilities 
                      | 
                     [Concept] Monetary | As Of | Credit | sfac6:Liabilities | 
| 5 | 
                         Equity 
                      | 
                     [Concept] Monetary | As Of | Credit | sfac6:Equity | 
| Component: (Network and Table) | |
|---|---|
| Network | 
                      02-Comprehensive Income 
                     (http://www.xbrlsite.com/sfac6/role/ComprehensiveIncome) 
                   | 
               
| Table | (Implied) | 
| # | Label | Report Element Class | Period Type | Balance | Name | 
|---|---|---|---|---|---|
| 1 | 
                         02-Comprehensive Income [Table] 
                      | 
                     (Implied) | |||
| 2 | 
                         Comprehensive Income [Roll Up] 
                      | 
                     [Abstract] | sfac6:ComprehensiveIncomeRollUp | ||
| 3 | 
                         Revenues 
                      | 
                     [Concept] Monetary | For Period | Credit | sfac6:Revenues | 
| 4 | 
                         (Expenses) 
                      | 
                     [Concept] Monetary | For Period | Debit | sfac6:Expenses | 
| 5 | 
                         Gains 
                      | 
                     [Concept] Monetary | For Period | Credit | sfac6:Gains | 
| 6 | 
                         (Losses) 
                      | 
                     [Concept] Monetary | For Period | Debit | sfac6:Losses | 
| 7 | 
                         Comprehensive Income 
                      | 
                     [Concept] Monetary | For Period | Credit | sfac6:ComprehensiveIncome | 
| Component: (Network and Table) | |
|---|---|
| Network | 
                      03-Changes in Equity 
                     (http://www.xbrlsite.com/sfac6/role/ChangesInEquity) 
                   | 
               
| Table | (Implied) | 
| # | Label | Report Element Class | Period Type | Balance | Name | 
|---|---|---|---|---|---|
| 1 | 
                         03-Changes in Equity [Table] 
                      | 
                     (Implied) | |||
| 2 | 
                         Changes in Equity [Roll Forward] 
                      | 
                     [Abstract] | sfac6:ChangesInEquityRollForward | ||
| 3 | 
                         Equity, Beginning Balance 
                      | 
                     [Concept] Monetary | As Of | Credit | sfac6:Equity | 
| 4 | 
                         Comprehensive Income 
                      | 
                     [Concept] Monetary | For Period | Credit | sfac6:ComprehensiveIncome | 
| 5 | 
                         Investments by Owners 
                      | 
                     [Concept] Monetary | For Period | Credit | sfac6:InvestmentsByOwners | 
| 6 | 
                         (Distributions to Owners) 
                      | 
                     [Concept] Monetary | For Period | Debit | sfac6:DistributionsToOwners | 
| 7 | 
                         Equity, Ending Balance 
                      | 
                     [Concept] Monetary | As Of | Credit | sfac6:Equity |