Average Annual Total Returns

12 Months Ended

60 Months Ended

120 Months Ended

Dec. 31, 2025

Dec. 31, 2025

Dec. 31, 2025

ICE BofA U.S. All Capital Securities Index (reflects no deduction for fees, expenses or taxes)[Member]

Prospectus [Line Items]

Average Annual Return, Percent

6.77%

2.41%

4.64%

ICE BofA Fixed Rate Preferred Securities Index (reflects no deduction for fees, expenses or taxes)[Member]

Prospectus [Line Items]

Average Annual Return, Percent

5.13%

1.61%

3.97%

Linked Blended Benchmark (reflects no deduction for fees, expenses or taxes)[Member]

Prospectus [Line Items]

Average Annual Return, Percent

8.14%

2.89%

4.94%

A

Prospectus [Line Items]

Average Annual Return, Percent

4.02%

1.81%

4.17%

A | After Taxes on Distributions

Prospectus [Line Items]

Average Annual Return, Percent

2.62%

0.32%

2.73%

A | After Taxes on Distributions and Sales

Prospectus [Line Items]

Average Annual Return, Percent

2.99%

1.01%

2.91%

C

Prospectus [Line Items]

Average Annual Return, Percent

6.42%

1.93%

3.90%

F

Prospectus [Line Items]

Average Annual Return, Percent

8.51%

2.96%

^[1]

I

Prospectus [Line Items]

Average Annual Return, Percent

8.44%

2.89%

4.87%

R

Prospectus [Line Items]

Average Annual Return, Percent

7.97%

2.44%

4.41%

Z

Prospectus [Line Items]

Average Annual Return, Percent

8.50%

2.96%

4.94%

[1]	The inception date for Class F shares is April 3, 2017. Since inception and through December 31, 2025, Class F shares had a return before taxes of 4.62%.