DEPOSITS WITH INTERBANK MARKET MAKER (Details)	Mar. 31, 2026 Counterparty
DEPOSITS WITH INTERBANK MARKET MAKER [Abstract]
Number of major rating agencies reporting credit ratings considered investment grade for NatWest	3

The number of major credit rating agencies reporting credit ratings considered investment grade for the interbank market maker.

No definition available.

Name:	cft_NumberOfMajorRatingAgenciesReportingCreditRatingsConsideredInvestmentGradeForInterbankMarketMaker
Namespace Prefix:	cft_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant