Shareholder Report, Average Annual Return (Details)

12 Months Ended

60 Months Ended

67 Months Ended

110 Months Ended

112 Months Ended

118 Months Ended

120 Months Ended

May 31, 2026

May 31, 2026

May 31, 2026

May 31, 2026

May 31, 2026

^[6]

May 31, 2026

May 31, 2026

American Funds Corporate Bond Fund® - Class A

Average Annual Return [Line Items]

Line Graph and Table Measure Name

American Funds Corporate Bond Fund — Class A (with sales charge)

Average Annual Return, Percent

^[1]

1.02%

(0.78%)

2.09%

American Funds Corporate Bond Fund® - Class C

Average Annual Return [Line Items]

Line Graph and Table Measure Name

American Funds Corporate Bond Fund — Class C (with sales charge)

Average Annual Return, Percent

^[1]

3.24%

(0.74%)

1.53%

^[2]

American Funds Corporate Bond Fund® - Class T

Average Annual Return [Line Items]

Line Graph and Table Measure Name

American Funds Corporate Bond Fund — Class T (with sales charge)

Average Annual Return, Percent

^[1]

2.65%

(0.24%)

2.49%

^[3]

American Funds Corporate Bond Fund® - Class F-1

Average Annual Return [Line Items]

Line Graph and Table Measure Name

American Funds Corporate Bond Fund — Class F-1

Average Annual Return, Percent

^[1]

5.01%

0.00%

2.13%

^[4]

American Funds Corporate Bond Fund® - Class F-2

Average Annual Return [Line Items]

Line Graph and Table Measure Name

American Funds Corporate Bond Fund — Class F-2

Average Annual Return, Percent

^[1]

5.28%

0.26%

2.41%

^[5]

American Funds Corporate Bond Fund® - Class F-3

Average Annual Return [Line Items]

Line Graph and Table Measure Name

American Funds Corporate Bond Fund — Class F-3

Average Annual Return, Percent

^[1]

5.40%

0.38%

2.96%

American Funds Corporate Bond Fund® - Class 529-A

Average Annual Return [Line Items]

Line Graph and Table Measure Name

American Funds Corporate Bond Fund — Class 529-A (with sales charge)

Average Annual Return, Percent

^[1]

1.32%

(0.73%)

1.74%

^[7]

American Funds Corporate Bond Fund® - Class 529-C

Average Annual Return [Line Items]

Line Graph and Table Measure Name

American Funds Corporate Bond Fund — Class 529-C (with sales charge)

Average Annual Return, Percent

^[1]

3.19%

(0.78%)

1.72%

^[8]

American Funds Corporate Bond Fund® - Class 529-E

Average Annual Return [Line Items]

Line Graph and Table Measure Name

American Funds Corporate Bond Fund — Class 529-E

Average Annual Return, Percent

^[1]

4.78%

(0.22%)

1.92%

^[9]

American Funds Corporate Bond Fund® - Class 529-T

Average Annual Return [Line Items]

Line Graph and Table Measure Name

American Funds Corporate Bond Fund — Class 529-T (with sales charge)

Average Annual Return, Percent

^[1]

2.59%

(0.30%)

2.43%

^[10]

American Funds Corporate Bond Fund® - Class 529-F-1

Average Annual Return [Line Items]

Line Graph and Table Measure Name

American Funds Corporate Bond Fund — Class 529-F-1

Average Annual Return, Percent

^[1]

5.22%

0.20%

2.35%

^[11]

American Funds Corporate Bond Fund® - Class 529-F-2

Average Annual Return [Line Items]

Line Graph and Table Measure Name

American Funds Corporate Bond Fund — Class 529-F-2

Average Annual Return, Percent

^[1]

5.30%

0.27%

0.10%

^[12]

American Funds Corporate Bond Fund® - Class 529-F-3

Average Annual Return [Line Items]

Line Graph and Table Measure Name

American Funds Corporate Bond Fund — Class 529-F-3

Average Annual Return, Percent

^[1]

5.36%

0.33%

0.15%

^[13]

American Funds Corporate Bond Fund® - Class R-1

Average Annual Return [Line Items]

Line Graph and Table Measure Name

American Funds Corporate Bond Fund — Class R-1

Average Annual Return, Percent

^[1]

4.26%

(0.71%)

1.52%

^[14]

American Funds Corporate Bond Fund® - Class R-2

Average Annual Return [Line Items]

Line Graph and Table Measure Name

American Funds Corporate Bond Fund — Class R-2

Average Annual Return, Percent

^[1]

4.27%

(0.70%)

1.47%

^[15]

American Funds Corporate Bond Fund® - Class R-2E

Average Annual Return [Line Items]

Line Graph and Table Measure Name

American Funds Corporate Bond Fund — Class R-2E

Average Annual Return, Percent

^[1]

4.57%

(0.42%)

1.81%

^[16]

American Funds Corporate Bond Fund® - Class R-3

Average Annual Return [Line Items]

Line Graph and Table Measure Name

American Funds Corporate Bond Fund — Class R-3

Average Annual Return, Percent

^[1]

4.74%

(0.26%)

1.89%

^[17]

American Funds Corporate Bond Fund® - Class R-4

Average Annual Return [Line Items]

Line Graph and Table Measure Name

American Funds Corporate Bond Fund — Class R-4

Average Annual Return, Percent

^[1]

5.04%

0.04%

2.18%

^[18]

American Funds Corporate Bond Fund® - Class R-5E

Average Annual Return [Line Items]

Line Graph and Table Measure Name

American Funds Corporate Bond Fund — Class R-5E

Average Annual Return, Percent

^[1]

5.23%

0.23%

2.39%

^[19]

American Funds Corporate Bond Fund® - Class R-5

Average Annual Return [Line Items]

Line Graph and Table Measure Name

American Funds Corporate Bond Fund — Class R-5

Average Annual Return, Percent

^[1]

5.26%

0.31%

2.45%

^[20]

American Funds Corporate Bond Fund® - Class R-6

Average Annual Return [Line Items]

Line Graph and Table Measure Name

American Funds Corporate Bond Fund — Class R-6

Average Annual Return, Percent

^[1]

5.40%

0.38%

2.50%

^[21]

Without Sales Load [Member] | American Funds Corporate Bond Fund® - Class A

Average Annual Return [Line Items]

Line Graph and Table Measure Name

American Funds Corporate Bond Fund — Class A (without sales charge)

Average Annual Return, Percent

^[1]

5.01%

(0.01%)

2.48%

Without Sales Load [Member] | American Funds Corporate Bond Fund® - Class C

Average Annual Return [Line Items]

Line Graph and Table Measure Name

American Funds Corporate Bond Fund — Class C (without sales charge)

Average Annual Return, Percent

^[1]

4.24%

(0.74%)

1.53%

^[2]

Without Sales Load [Member] | American Funds Corporate Bond Fund® - Class T

Average Annual Return [Line Items]

Line Graph and Table Measure Name

American Funds Corporate Bond Fund — Class T (without sales charge)

Average Annual Return, Percent

^[1]

5.28%

0.27%

2.77%

^[3]

Without Sales Load [Member] | American Funds Corporate Bond Fund® - Class 529-A

Average Annual Return [Line Items]

Line Graph and Table Measure Name

American Funds Corporate Bond Fund — Class 529-A (without sales charge)

Average Annual Return, Percent

^[1]

4.99%

(0.02%)

2.11%

^[7]

Without Sales Load [Member] | American Funds Corporate Bond Fund® - Class 529-C

Average Annual Return [Line Items]

Line Graph and Table Measure Name

American Funds Corporate Bond Fund — Class 529-C (without sales charge)

Average Annual Return, Percent

^[1]

4.19%

(0.78%)

1.72%

^[8]

Without Sales Load [Member] | American Funds Corporate Bond Fund® - Class 529-T

Average Annual Return [Line Items]

Line Graph and Table Measure Name

American Funds Corporate Bond Fund — Class 529-T (without sales charge)

Average Annual Return, Percent

^[1]

5.22%

0.21%

2.71%

^[10]

Bloomberg U.S. Aggregate Index [Member]

Average Annual Return [Line Items]

Line Graph and Table Measure Name

Bloomberg U.S. Aggregate Index

Average Annual Return, Percent

^[22]

5.13%

0.17%

(0.06%)

^[12],[13]

1.84%

^[3],[10]

1.90%

1.48%

^{[2],[4],[5],[7],[8],[9],[11],[14],[15],[16],[17],[18],[19],[20],[21]}

1.70%

Bloomberg U.S. Corporate Investment Grade Index [Member]

Average Annual Return [Line Items]

Line Graph and Table Measure Name

Bloomberg U.S. Corporate Investment Grade Index

Average Annual Return, Percent

^[22]

6.09%

0.63%

0.61%

^[12],[13]

2.82%

^[3],[10]

2.90%

2.47%

^{[2],[4],[5],[7],[8],[9],[11],[14],[15],[16],[17],[18],[19],[20],[21]}

2.81%

[1]	Investment results assume all distributions are reinvested and reflect applicable fees and expenses. When applicable, results reflect fee waivers and/or expense reimbursements, without which they would have been lower.
[2]	Class C shares were first offered on July 29, 2016.
[3]	Class T shares were first offered on April 7, 2017.
[4]	Class F-1 shares were first offered on July 29, 2016.
[5]	Class F-2 shares were first offered on July 29, 2016.
[6]	Class F-3 shares were first offered on January 27, 2017.
[7]	Class 529-A shares were first offered on July 29, 2016.
[8]	Class 529-C shares were first offered on July 29, 2016.
[9]	Class 529-E shares were first offered on July 29, 2016.
[10]	Class 529-T shares were first offered on April 7, 2017.
[11]	Class 529-F-1 shares were first offered on July 29, 2016.
[12]	Class 529-F-2 shares were first offered on October 30, 2020.
[13]	Class 529-F-3 shares were first offered on October 30, 2020.
[14]	Class R-1 shares were first offered on July 29, 2016.
[15]	Class R-2 shares were first offered on July 29, 2016.
[16]	Class R-2E shares were first offered on July 29, 2016.
[17]	Class R-3 shares were first offered on July 29, 2016.
[18]	Class R-4 shares were first offered on July 29, 2016.
[19]	Class R-5E shares were first offered on July 29, 2016.
[20]	Class R-5 shares were first offered on July 29, 2016.
[21]	Class R-6 shares were first offered on July 29, 2016.
[22]	Results assume all distributions are reinvested. Any market index shown is unmanaged, and therefore, has no expenses. Investors cannot invest directly in an index. Source(s): Bloomberg Index Services Ltd.