Shareholder Report, Average Annual Return (Details)
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12 Months Ended |
60 Months Ended |
120 Months Ended |
Mar. 31, 2026 |
Mar. 31, 2026 |
Mar. 31, 2026 |
| C000153990 [Member] |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
International Growth Fund (Class R6/JIGTX)
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| Average Annual Return, Percent |
21.29%
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4.46%
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9.04%
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| C000153989 [Member] |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
International Growth Fund (Class R4/JIGIX)
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| Average Annual Return, Percent |
21.02%
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4.21%
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8.77%
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| C000153988 [Member] |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
International Growth Fund (Class R2/JHIGX)
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| Average Annual Return, Percent |
20.72%
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3.95%
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8.50%
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| C000156262 [Member] |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
International Growth Fund (Class NAV/JIGHX)
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| Average Annual Return, Percent |
21.33%
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4.47%
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9.05%
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| C000003788 [Member] |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
International Growth Fund (Class I/GOGIX)
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| Average Annual Return, Percent |
21.18%
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4.35%
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8.92%
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| C000003787 [Member] |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
International Growth Fund (Class C/GONCX)
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| Average Annual Return, Percent |
18.96%
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3.31%
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7.84%
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| C000003785 [Member] |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
International Growth Fund (Class A/GOIGX)
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| Average Annual Return, Percent |
14.79%
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2.98%
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8.04%
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| C000003791 [Member] |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
International Growth Fund (Class 1/GOIOX)
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| Average Annual Return, Percent |
21.27%
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4.42%
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8.99%
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| C000043689 [Member] |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Global Shareholder Yield Fund (Class A/JGYAX)
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| Average Annual Return, Percent |
17.65%
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10.36%
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8.27%
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| C000043691 [Member] |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Global Shareholder Yield Fund (Class C/JGYCX)
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| Average Annual Return, Percent |
21.86%
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10.65%
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8.01%
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| C000043686 [Member] |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Global Shareholder Yield Fund (Class I/JGYIX)
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| Average Annual Return, Percent |
24.11%
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11.77%
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9.10%
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| C000113315 [Member] |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Global Shareholder Yield Fund (Class R2/JGSRX)
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| Average Annual Return, Percent |
23.64%
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11.34%
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8.68%
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| C000106446 [Member] |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Global Shareholder Yield Fund (Class R6/JGRSX)
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| Average Annual Return, Percent |
24.20%
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11.88%
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9.21%
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| C000104499 [Member] |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Disciplined Value Fund (Class R6/JDVWX)
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| Average Annual Return, Percent |
19.61%
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11.28%
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11.74%
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| C000076627 [Member] |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Disciplined Value Fund (Class R5/JDVVX)
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| Average Annual Return, Percent |
19.60%
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11.23%
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11.68%
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| C000076626 [Member] |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Disciplined Value Fund (Class R4/JDVFX)
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| Average Annual Return, Percent |
19.35%
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11.00%
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11.46%
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| C000111293 [Member] |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Disciplined Value Fund (Class R2/JDVPX)
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| Average Annual Return, Percent |
19.04%
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10.72%
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11.18%
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| C000078799 [Member] |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Disciplined Value Fund (Class NAV/JDVNX)
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| Average Annual Return, Percent |
19.65%
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11.29%
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11.75%
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| C000069766 [Member] |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Disciplined Value Fund (Class I/JVLIX)
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| Average Annual Return, Percent |
19.51%
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11.16%
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11.61%
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| C000069764 [Member] |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Disciplined Value Fund (Class C/JVLCX)
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| Average Annual Return, Percent |
17.32%
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10.05%
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10.51%
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| C000069762 [Member] |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Disciplined Value Fund (Class A/JVLAX)
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| Average Annual Return, Percent |
13.24%
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9.75%
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10.77%
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| C000088535 [Member] |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Disciplined Value Mid Cap Fund (Class A/JVMAX)
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| Average Annual Return, Percent |
8.50%
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7.13%
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9.51%
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| C000105879 [Member] |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Disciplined Value Mid Cap Fund (Class C/JVMCX)
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| Average Annual Return, Percent |
12.32%
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7.42%
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9.25%
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| C000088536 [Member] |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Disciplined Value Mid Cap Fund (Class I/JVMIX)
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| Average Annual Return, Percent |
14.48%
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8.51%
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10.35%
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| C000113318 [Member] |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Disciplined Value Mid Cap Fund (Class R2/JVMSX)
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| Average Annual Return, Percent |
14.07%
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8.09%
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9.92%
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| C000128515 [Member] |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Disciplined Value Mid Cap Fund (Class R4/JVMTX)
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| Average Annual Return, Percent |
14.35%
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8.36%
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10.19%
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| C000106449 [Member] |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Disciplined Value Mid Cap Fund (Class R6/JVMRX)
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| Average Annual Return, Percent |
14.64%
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8.63%
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10.47%
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| C000153996 [Member] |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
U.S. Growth Fund (Class R6/JSGTX)
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| Average Annual Return, Percent |
17.80%
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12.50%
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15.84%
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| C000153995 [Member] |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
U.S. Growth Fund (Class R4/JHSGX)
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| Average Annual Return, Percent |
17.52%
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12.26%
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15.58%
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| C000153994 [Member] |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
U.S. Growth Fund (Class R2/JSGRX)
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| Average Annual Return, Percent |
17.26%
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11.94%
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15.27%
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| C000107857 [Member] |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
U.S. Growth Fund (Class NAV/JSGBX)
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| Average Annual Return, Percent |
17.85%
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12.51%
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15.85%
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| C000107856 [Member] |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
U.S. Growth Fund (Class I/JSGIX)
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| Average Annual Return, Percent |
17.68%
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12.38%
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15.71%
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| C000145658 [Member] |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
U.S. Growth Fund (Class C/JSGCX)
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| Average Annual Return, Percent |
15.50%
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11.26%
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14.56%
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| C000107855 [Member] |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
U.S. Growth Fund (Class A/JSGAX)
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| Average Annual Return, Percent |
11.51%
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10.96%
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14.82%
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| Without Sales Load [Member] | C000003787 [Member] |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
International Growth Fund (Class C/GONCX)—excluding sales charge
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| Average Annual Return, Percent |
19.96%
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3.31%
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7.84%
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| Without Sales Load [Member] | C000003785 [Member] |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
International Growth Fund (Class A/GOIGX)—excluding sales charge
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| Average Annual Return, Percent |
20.82%
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4.04%
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8.59%
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| Without Sales Load [Member] | C000043689 [Member] |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Global Shareholder Yield Fund (Class A/JGYAX)—excluding sales charge
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| Average Annual Return, Percent |
23.86%
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11.50%
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8.83%
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| Without Sales Load [Member] | C000043691 [Member] |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Global Shareholder Yield Fund (Class C/JGYCX)—excluding sales charge
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| Average Annual Return, Percent |
22.86%
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10.65%
|
8.01%
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| Without Sales Load [Member] | C000069764 [Member] |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Disciplined Value Fund (Class C/JVLCX)—excluding sales charge
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| Average Annual Return, Percent |
18.32%
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10.05%
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10.51%
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| Without Sales Load [Member] | C000069762 [Member] |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Disciplined Value Fund (Class A/JVLAX)—excluding sales charge
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| Average Annual Return, Percent |
19.22%
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10.89%
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11.34%
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| Without Sales Load [Member] | C000088535 [Member] |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Disciplined Value Mid Cap Fund (Class A/JVMAX)—excluding sales charge
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| Average Annual Return, Percent |
14.19%
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8.23%
|
10.07%
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| Without Sales Load [Member] | C000105879 [Member] |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Disciplined Value Mid Cap Fund (Class C/JVMCX)—excluding sales charge
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| Average Annual Return, Percent |
13.32%
|
7.42%
|
9.25%
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| Without Sales Load [Member] | C000145658 [Member] |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
U.S. Growth Fund (Class C/JSGCX)—excluding sales charge
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| Average Annual Return, Percent |
16.50%
|
11.26%
|
14.56%
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| Without Sales Load [Member] | C000107855 [Member] |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
U.S. Growth Fund (Class A/JSGAX)—excluding sales charge
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| Average Annual Return, Percent |
17.38%
|
12.10%
|
15.41%
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| MSCI ACWI ex USA Index [Member] |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
MSCI ACWI ex USA Index
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| Average Annual Return, Percent |
24.91%
|
7.02%
|
8.38%
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| MSCI World Index [Member] |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
MSCI World Index
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| Average Annual Return, Percent |
18.90%
|
10.27%
|
11.80%
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| Russell 1000 Index [Member] |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Russell 1000 Index
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| Average Annual Return, Percent |
17.74%
|
11.34%
|
13.97%
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| Russell 3000 Index [Member] |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Russell 3000 Index
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| Average Annual Return, Percent |
18.09%
|
10.87%
|
13.72%
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| MSCI EAFE Index [Member] |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
MSCI EAFE Index
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| Average Annual Return, Percent |
21.27%
|
7.91%
|
8.38%
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| MSCI ACWI ex USA Growth Index [Member] |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
MSCI ACWI ex USA Growth Index
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| Average Annual Return, Percent |
18.77%
|
3.26%
|
7.56%
|
| Russell 1000 Value Index [Member] |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Russell 1000 Value Index
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| Average Annual Return, Percent |
15.87%
|
9.43%
|
10.58%
|
| Russell Midcap Value Index [Member] |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Russell Midcap Value Index
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| Average Annual Return, Percent |
17.62%
|
7.94%
|
9.75%
|
| Russell 1000 Growth Index [Member] |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Russell 1000 Growth Index
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| Average Annual Return, Percent |
18.81%
|
12.76%
|
16.83%
|