v3.25.4
Shareholder Report, Average Annual Return (Details)
 12 Months Ended 60 Months Ended 120 Months Ended
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Schwab Monthly Income Fund - Target Payout      
Average Annual Return [Line Items]      
Line Graph and Table Measure Name Schwab Monthly Income Fund – Target Payout    
Average Annual Return, Percent [1] 12.17% 3.82% 4.85%
Schwab Monthly Income Fund - Flexible Payout      
Average Annual Return [Line Items]      
Line Graph and Table Measure Name Schwab Monthly Income Fund – Flexible Payout    
Average Annual Return, Percent [1] 12.14% 3.21% 4.27%
Schwab Monthly Income Fund - Income Payout      
Average Annual Return [Line Items]      
Line Graph and Table Measure Name Schwab Monthly Income Fund – Income Payout    
Average Annual Return, Percent [1] 9.85% 1.97% 3.37%
Standard & Poor's 500 Index [Member]      
Average Annual Return [Line Items]      
Line Graph and Table Measure Name S&P 500® Index    
Average Annual Return, Percent 17.88% 14.42% 14.82%
Bloomberg US Aggregate Bond Index [Member]      
Average Annual Return [Line Items]      
Line Graph and Table Measure Name Bloomberg US Aggregate Bond Index    
Average Annual Return, Percent 7.30% (0.36%) 2.01%
Target Payout Composite Index [Member]      
Average Annual Return [Line Items]      
Line Graph and Table Measure Name Target Payout Composite Index    
Average Annual Return, Percent 11.66% 3.79% 5.86%
Flexible Payout Composite Index [Member]      
Average Annual Return [Line Items]      
Line Graph and Table Measure Name Flexible Payout Composite Index    
Average Annual Return, Percent 11.66% 3.19% 5.01%
Income Payout Composite Index [Member]      
Average Annual Return [Line Items]      
Line Graph and Table Measure Name Income Payout Composite Index    
Average Annual Return, Percent 9.67% 2.00% 3.83%
[1] The fund’s routine expenses have been absorbed by the investment adviser and its affiliates. Without these reductions, the fund’s returns would have been lower. These returns do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.