v3.26.1
Shareholder Report, Line Graph (Details) - USD ($)
 12 Months Ended 24 Months Ended 36 Months Ended 48 Months Ended 60 Months Ended 72 Months Ended 84 Months Ended 96 Months Ended 108 Months Ended 120 Months Ended
Mar. 31, 2016
Mar. 31, 2026
Mar. 31, 2017
Mar. 31, 2018
Mar. 31, 2019
Mar. 31, 2020
Mar. 31, 2021
Mar. 31, 2022
Mar. 31, 2023
Mar. 31, 2024
Mar. 31, 2025
Mar. 31, 2026
C000153990 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   International Growth Fund (Class R6/JIGTX)                    
Accumulated Value $ 1,000,000   $ 1,083,506.02 $ 1,380,186.751784 $ 1,334,344.331889 $ 1,234,053.997803 $ 1,910,147.670872 $ 1,755,669.65449 $ 1,598,414.604444 $ 1,811,225.015369 $ 1,958,888.883983 $ 2,375,924.436927
C000153989 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   International Growth Fund (Class R4/JIGIX)                    
Accumulated Value 10,000   10,803.513 13,724.826669 13,240.50279 12,211.934324 18,862.903873 17,295.878886 15,708.612212 17,755.278343 19,151.540293 23,177.75482
C000153988 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   International Growth Fund (Class R2/JHIGX)                    
Accumulated Value 10,000   10,782.5206 13,664.891283 13,144.823695 12,095.429567 18,629.911608 17,037.907415 15,434.409804 17,401.867977 18,725.950531 22,606.701164
C000156262 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   International Growth Fund (Class NAV/JIGHX)                    
Accumulated Value 10,000   10,836.7297 13,798.841288 13,347.916681 12,345.801013 19,109.345628 17,565.047174 15,995.237654 18,123.324847 19,598.674767 23,779.915622
C000003788 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   International Growth Fund (Class I/GOGIX)                    
Accumulated Value 250,000   270,581.36 344,287.354473 332,406.397243 307,125.770523 474,864.01501 435,950.851174 396,549.342955 448,876.063056 484,926.561022 587,625.651362
C000003787 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   International Growth Fund (Class C/GONCX)                    
Accumulated Value 10,000   10,713.253 13,493.975842 12,903.894534 11,803.60048 18,066.434733 16,423.06558 14,787.626655 16,572.401509 17,725.379444 21,263.829054
C000003785 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   International Growth Fund (Class A/GOIGX)                    
Accumulated Value 9,500   10,250.388945 12,999.857537 12,520.299162 11,534.824913 17,776.207016 16,272.295106 14,757.31205 16,651.475623 17,933.360001 21,666.297023
C000003791 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   International Growth Fund (Class 1/GOIOX)                    
Accumulated Value 10,000   10,831.0072 13,785.913053 13,327.75643 12,321.58199 19,059.321328 17,514.776227 15,937.076361 18,057.210332 19,511.451919 23,661.217754
C000043689 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Global Shareholder Yield Fund (Class A/JGYAX)                    
Accumulated Value 9,500   10,167.01077 10,649.11761 11,166.222894 9,160.603332 12,844.915913 14,135.493682 13,784.806219 15,784.433517 17,873.532652 22,138.384
C000043691 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Global Shareholder Yield Fund (Class C/JGYCX)                    
Accumulated Value 10,000   10,624.7044 11,044.576887 11,493.512762 9,357.169525 13,027.36834 14,225.134809 13,777.158713 15,652.36875 17,585.781895 21,606.465284
C000043686 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Global Shareholder Yield Fund (Class I/JGYIX)                    
Accumulated Value 250,000   268,296.0725 281,672.324662 296,033.410669 243,437.950925 342,397.724908 377,585.678875 369,211.579913 423,911.346191 481,317.607213 597,378.333114
C000113315 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Global Shareholder Yield Fund (Class R2/JGSRX)                    
Accumulated Value 10,000   10,697.6988 11,185.962848 11,709.202144 9,589.505888 13,443.363173 14,763.827169 14,390.658888 16,452.07055 18,599.750821 22,996.891687
C000106446 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Global Shareholder Yield Fund (Class R6/JGRSX)                    
Accumulated Value 1,000,000   1,075,467.07 1,129,259.921718 1,189,202.845179 978,812.526498 1,377,381.336317 1,520,696.294146 1,488,468.040721 1,711,108.446232 1,943,576.491298 2,413,974.226092
C000104499 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Disciplined Value Fund (Class R6/JDVWX)                    
Accumulated Value 1,000,000   1,189,659.68 1,342,384.073496 1,352,538.403582 1,073,114.356897 1,778,571.343367 2,024,389.627377 1,918,814.631237 2,452,687.750068 2,537,179.335714 3,034,761.026663
C000076627 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Disciplined Value Fund (Class R5/JDVVX)                    
Accumulated Value 10,000   11,888.1166 13,401.231682 13,501.478926 10,701.469048 17,728.864475 20,179.006133 19,108.193451 24,422.641411 25,240.257227 30,187.790862
C000076626 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Disciplined Value Fund (Class R4/JDVFX)                    
Accumulated Value 10,000   11,863.2815 13,350.981843 13,420.555011 10,619.975601 17,558.93236 19,943.907885 18,843.657133 24,036.322513 24,794.969663 29,593.031597
C000111293 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Disciplined Value Fund (Class R2/JDVPX)                    
Accumulated Value 10,000   11,832.1376 13,286.944353 13,319.324504 10,512.06562 17,338.359992 19,641.730775 18,516.196748 23,555.588556 24,240.648671 28,855.068494
C000078799 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Disciplined Value Fund (Class NAV/JDVNX)                    
Accumulated Value 10,000   11,895.4894 13,424.260941 13,527.18381 10,735.109494 17,788.963688 20,248.417244 19,194.822845 24,544.877001 25,382.302796 30,369.204692
C000069766 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Disciplined Value Fund (Class I/JVLIX)                    
Accumulated Value 250,000   297,005.01 334,742.763576 336,897.804014 266,934.28422 441,991.608303 502,665.365445 475,894.775331 607,604.093881 627,672.710258 750,161.771766
C000069764 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Disciplined Value Fund (Class C/JVLCX)                    
Accumulated Value 10,000   11,760.503 13,122.67114 13,077.183238 10,264.648592 16,823.589881 18,936.290915 17,750.291321 22,436.451479 22,952.348513 27,157.703744
C000069762 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Disciplined Value Fund (Class A/JVLAX)                    
Accumulated Value 9,500   11,257.68601 12,656.069947 12,712.551962 10,043.905214 16,591.563985 18,818.432933 17,765.522792 22,635.949215 23,329.771164 27,813.413734
C000088535 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Disciplined Value Mid Cap Fund (Class A/JVMAX)                    
Accumulated Value 9,500   11,396.180525 12,552.642702 12,178.595917 9,736.051361 16,702.384113 18,524.47726 17,500.993593 21,904.601476 21,722.774884 24,805.496227
C000105879 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Disciplined Value Mid Cap Fund (Class C/JVMCX)                    
Accumulated Value 10,000   11,899.4632 13,012.489367 12,528.623463 9,943.588575 16,923.86525 18,636.180642 17,476.7411 21,704.081474 21,365.413591 24,211.358469
C000088536 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Disciplined Value Mid Cap Fund (Class I/JVMIX)                    
Accumulated Value 250,000   300,621.6775 332,069.236201 322,802.312854 258,759.673613 444,986.953573 494,970.958608 468,682.328339 588,003.140583 584,631.042532 669,276.970798
C000113318 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Disciplined Value Mid Cap Fund (Class R2/JVMSX)                    
Accumulated Value 10,000   11,975.857 13,177.320123 12,762.938472 10,192.012988 17,451.906245 19,333.462225 18,241.501898 22,789.655019 22,569.433113 25,744.635929
C000128515 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Disciplined Value Mid Cap Fund (Class R4/JVMTX)                    
Accumulated Value 10,000   12,008.8583 13,240.729386 12,857.233242 10,290.962016 17,668.707667 19,622.155039 18,559.129303 23,245.000814 23,078.251871 26,390.743058
C000106449 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Disciplined Value Mid Cap Fund (Class R6/JVMRX)                    
Accumulated Value 1,000,000   1,203,545.53 1,330,585.838596 1,295,217.829149 1,039,745.943053 1,788,969.162744 1,992,143.285041 1,888,262.116821 2,371,526.947524 2,360,427.442521 2,706,048.687606
C000153996 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   U.S. Growth Fund (Class R6/JSGTX)                    
Accumulated Value 1,000,000   1,148,706.24 1,404,440.263467 1,582,584.64887 1,588,660.048904 2,414,188.290603 2,665,919.711217 2,375,109.752322 3,482,108.292276 3,692,353.638328 4,349,714.802856
C000153995 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   U.S. Growth Fund (Class R4/JHSGX)                    
Accumulated Value 10,000   11,459.5266 13,986.412607 15,715.350834 15,741.84723 23,862.544846 26,314.319436 23,385.192807 34,232.129893 36,208.283314 42,552.972813
C000153994 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   U.S. Growth Fund (Class R2/JSGRX)                    
Accumulated Value 10,000   11,430.4316 13,908.493733 15,595.15521 15,576.136762 23,556.86669 25,887.802395 22,946.462647 33,475.109949 35,316.792666 41,411.925083
C000107857 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   U.S. Growth Fund (Class NAV/JSGBX)                    
Accumulated Value 10,000   11,480.5989 14,040.468793 15,822.850706 15,884.603811 24,145.784214 26,675.821981 23,753.254137 34,831.456186 36,935.226679 43,529.242411
C000107856 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   U.S. Growth Fund (Class I/JSGIX)                    
Accumulated Value 250,000   286,741.2975 350,180.82819 394,114.451862 395,120.961055 599,951.694924 661,923.71725 588,810.456476 862,614.926168 913,728.638797 1,075,278.000261
C000145658 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   U.S. Growth Fund (Class C/JSGCX)                    
Accumulated Value 10,000   11,352.7883 13,731.265793 15,301.617701 15,195.62416 22,838.180363 24,950.292052 21,974.849464 31,865.634716 33,414.468353 38,927.987618
C000107855 [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   U.S. Growth Fund (Class A/JSGAX)                    
Accumulated Value 9,500   10,862.51736 13,242.626133 14,860.438305 14,869.594415 22,508.28588 24,771.614445 21,991.643547 32,125.576744 33,942.712447 39,841.880178
MSCI ACWI ex USA C000153990 Index [Member]                        
Account Value [Line Items]                        
Accumulated Value 1,000,000   1,131,342.92 1,318,333.981727 1,262,753.561574 1,066,110.063582 1,592,907.850205 1,569,264.446417 1,489,689.9024 1,687,193.674918 1,789,873.38 2,235,817.952095
MSCI ACWI ex USA C000003788 Index [Member]                        
Account Value [Line Items]                        
Accumulated Value 250,000   282,835.73 329,583.495432 315,688.390394 266,527.515896 398,226.962552 392,316.111605 372,422.475601 421,798.418731 447,468.345002 558,954.488026
MSCI ACWI ex USA Index [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   MSCI ACWI ex USA Index                    
Accumulated Value 10,000   11,313.4292 13,183.339817 12,627.535615 10,661.100635 15,929.078501 15,692.644463 14,896.899023 16,871.936748 17,898.733799 22,358.17952
MSCI World Index [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   MSCI World Index                    
Accumulated Value 10,000   11,476.6702 13,036.320874 13,559.550038 12,150.751841 18,716.212298 20,610.340709 19,163.045692 23,974.579665 25,661.998808 30,511.708044
MSCI World C000106446 Index [Member]                        
Account Value [Line Items]                        
Accumulated Value 1,000,000   1,147,667.02 1,303,632.087374 1,355,955.003777 1,215,075.184035 1,871,621.229701 2,061,034.070781 1,916,304.56908 2,397,457.96634 2,566,199.880656 3,051,170.804198
MSCI World C000043686 Index [Member]                        
Account Value [Line Items]                        
Accumulated Value 250,000   286,916.755 325,908.021843 338,988.750944 303,768.796009 467,905.307426 515,258.517696 479,076.142271 599,364.491586 641,549.970165 762,792.701051
Russell 1000 C000104499 Index [Member]                        
Account Value [Line Items]                        
Accumulated Value 1,000,000   1,174,280.56 1,338,428.871159 1,462,914.976032 1,345,499.079392 2,160,699.284166 2,447,424.597743 2,242,000.283348 2,911,639.605198 3,139,353.493954 3,696,412.18189
Russell 1000 C000069766 Index [Member]                        
Account Value [Line Items]                        
Accumulated Value 250,000   293,570.14 334,607.21779 365,728.744008 336,374.769848 540,174.821042 611,856.149436 560,500.070837 727,909.9013 784,838.373489 924,103.045473
Russell 1000 Index [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Russell 1000 Index                    
Accumulated Value 10,000   11,742.8056 13,384.288712 14,629.149761 13,454.990795 21,606.992843 24,474.245979 22,420.002835 29,116.396054 31,393.534942 36,964.121822
Russell 3000 Index [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Russell 3000 Index                    
Accumulated Value 10,000   11,806.6553 13,437.545551 14,615.556044 13,281.818885 21,586.723342 24,160.809069 22,087.765262 28,557.988234 30,619.588833 36,157.296102
Russell 3000 C000106449 Index [Member]                        
Account Value [Line Items]                        
Accumulated Value 1,000,000   1,180,665.53 1,343,754.555142 1,461,555.604471 1,328,181.888561 2,158,672.334268 2,416,080.906988 2,208,776.526293 2,855,798.823555 3,061,958.883511 3,615,729.610486
Russell 3000 C000088536 Index [Member]                        
Account Value [Line Items]                        
Accumulated Value 250,000   295,166.3825 335,938.638786 365,388.901118 332,045.47214 539,668.083567 604,020.226747 552,194.131573 713,949.705888 765,489.720877 903,932.402621
MSCI EAFE C000153990 Index [Member]                        
Account Value [Line Items]                        
Accumulated Value 1,000,000   1,116,743.09 1,282,040.029618 1,234,426.383419 1,056,915.054762 1,527,945.990451 1,545,717.255236 1,524,432.311288 1,757,915.37021 1,843,733.14212 2,235,876.006624
MSCI ACWI ex USA Growth C000153990 Index [Member]                        
Account Value [Line Items]                        
Accumulated Value 1,000,000   1,096,300.59 1,314,672.98956 1,274,638.409921 1,181,511.568691 1,764,708.242877 1,656,014.762191 1,550,820.415418 1,724,749.499927 1,744,631.239332 2,072,169.093288
MSCI EAFE C000003788 Index [Member]                        
Account Value [Line Items]                        
Accumulated Value 250,000   279,185.7725 320,510.007404 308,606.595854 264,228.76369 381,986.497612 386,429.313808 381,108.077821 439,478.842551 460,933.285528 558,969.001654
MSCI ACWI ex USA Growth C000003788 Index [Member]                        
Account Value [Line Items]                        
Accumulated Value 250,000   274,075.1475 328,668.24739 318,659.60248 295,377.892173 441,177.06072 414,003.690549 387,705.103856 431,187.374984 436,157.809835 518,042.273324
MSCI EAFE Index [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   MSCI EAFE Index                    
Accumulated Value 10,000   11,167.4309 12,820.400296 12,344.263834 10,569.150547 15,279.459904 15,457.172552 15,244.323113 17,579.153702 18,437.331421 22,358.760066
MSCI ACWI ex USA Growth Index [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   MSCI ACWI ex USA Growth Index                    
Accumulated Value 10,000   10,963.0059 13,146.729896 12,746.3841 11,815.115688 17,647.08243 16,560.147623 15,508.204155 17,247.495 17,446.312394 20,721.690934
Russell 1000 Value C000104499 Index [Member]                        
Account Value [Line Items]                        
Accumulated Value 1,000,000   1,192,225.67 1,275,064.311282 1,347,420.436757 1,116,087.198178 1,742,071.656782 1,945,351.054311 1,830,311.669225 2,201,283.869032 2,359,339.484831 2,733,662.213115
Russell 1000 Value C000069766 Index [Member]                        
Account Value [Line Items]                        
Accumulated Value 250,000   298,056.4175 318,766.07782 336,855.109189 279,021.799544 435,517.914195 486,337.763577 457,577.917305 550,320.967257 589,834.871207 683,415.553278
Russell 1000 Value Index [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Russell 1000 Value Index                    
Accumulated Value 10,000   11,922.2567 12,750.643113 13,474.204368 11,160.871982 17,420.716568 19,453.510543 18,303.116692 22,012.83869 23,593.394848 27,336.622131
Russell Midcap Value Index [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Russell Midcap Value Index                    
Accumulated Value 10,000   11,981.5483 12,760.550469 13,129.561216 9,961.295947 17,308.68279 19,291.376307 17,513.187137 21,085.021268 21,563.608237 25,364.140495
Russell Midcap Value C000106449 Index [Member]                        
Account Value [Line Items]                        
Accumulated Value 1,000,000   1,198,154.83 1,276,055.046914 1,312,956.121606 996,129.594664 1,730,868.278962 1,929,137.63061 1,751,318.713602 2,108,502.126718 2,156,360.82365 2,536,414.04948
Russell Midcap Value C000088536 Index [Member]                        
Account Value [Line Items]                        
Accumulated Value 250,000   299,538.7075 319,013.761729 328,239.030402 249,032.398666 432,717.06974 482,284.407652 437,829.6784 527,125.531679 539,090.205912 634,103.512369
Russell 1000 Growth C000107856 Index [Member]                        
Account Value [Line Items]                        
Accumulated Value 250,000   289,392.075 350,897.423512 395,630.406042 399,236.145956 649,731.436125 747,042.752884 665,604.171055 925,166.528245 996,988.427052 1,184,545.469137
Russell 1000 Growth Index [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Russell 1000 Growth Index                    
Accumulated Value 10,000   11,575.683 14,035.89694 15,825.216241 15,969.445838 25,989.257445 29,881.710115 26,624.166842 37,006.66113 39,879.537082 47,381.818765
Russell 1000 Growth C000153996 Index [Member]                        
Account Value [Line Items]                        
Accumulated Value $ 1,000,000   $ 1,157,568.3 $ 1,403,589.69405 $ 1,582,521.62417 $ 1,596,944.583826 $ 2,598,925.744501 $ 2,988,171.011536 $ 2,662,416.684218 $ 3,700,666.112976 $ 3,987,953.708206 $ 4,738,181.876548