XML 13 R9.htm IDEA: XBRL DOCUMENT v3.5.0.2
Label Element Value
Risk/Return: rr_RiskReturnAbstract  
Registrant Name dei_EntityRegistrantName AB FIXED INCOME SHARES INC
Prospectus Date rr_ProspectusDate Aug. 31, 2016
Document Creation Date dei_DocumentCreationDate Aug. 29, 2016