Details for Selection
| Standard label: | Auction Market Preferred Securities, Shares, Redeemed |
| Name: | us-gaap:AuctionMarketPreferredSecuritiesSharesRedeemed |
| Documentation: | These are the number of AMPS shares redeemed during the period. |
| Commentary: | |
| Data type: | Shares (xbrli:sharesItemType) |
| Period type: | For period (duration) |
| Balance type: | |
| Object class: | [Concept] |