v3.25.2
PGIM Target Date 2020 Fund Average Annual Total Returns
 12 Months Ended 60 Months Ended 61 Months Ended 87 Months Ended 88 Months Ended 97 Months Ended 120 Months Ended
Jul. 31, 2025
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
 [2],[3]
Dec. 31, 2024
 [4],[5],[6]
Dec. 31, 2024
 [7],[8]
Dec. 31, 2024
Dec. 31, 2024
 [6]
S&P 500 Index[Member]                
Prospectus [Line Items]                
Average Annual Return, Percent   25.02% [1] 14.53% [1] 14.53% 14.34% 14.48% 14.92% [1],[9] 13.10%
Bloomberg US Aggregate Bond Index[Member]                
Prospectus [Line Items]                
Average Annual Return, Percent   1.25% [1] (0.33%) [1] (0.33%)   0.91% 1.29% [1],[9]  
S&P Target Date 2020 Index[Member]                
Prospectus [Line Items]                
Average Annual Return, Percent   8.09% 4.88%       6.16% [10]  
PGIM Target Date 2020 Custom Benchmark[Member]                
Prospectus [Line Items]                
Average Annual Return, Percent   7.00% 4.84%       5.81% [10]  
R1                
Prospectus [Line Items]                
Average Annual Return, Percent   6.76% 4.10%       4.92%  
Performance Inception Date Dec. 13, 2016              
R2                
Prospectus [Line Items]                
Average Annual Return, Percent   7.15% 4.37%       5.18%  
Performance Inception Date Dec. 13, 2016              
R3                
Prospectus [Line Items]                
Average Annual Return, Percent   7.29% 4.52%       5.34%  
Performance Inception Date Dec. 13, 2016              
R4                
Prospectus [Line Items]                
Average Annual Return, Percent   7.39% 4.64%       5.46%  
Performance Inception Date Dec. 13, 2016              
R5                
Prospectus [Line Items]                
Average Annual Return, Percent   7.39% 4.72%       5.55%  
Performance Inception Date Dec. 13, 2016              
R6                
Prospectus [Line Items]                
Average Annual Return, Percent   7.58% 4.87%       5.66%  
Performance Inception Date Dec. 13, 2016              
R6 | After Taxes on Distributions                
Prospectus [Line Items]                
Average Annual Return, Percent   3.89% 2.40%       3.69%  
Performance Inception Date Dec. 13, 2016              
R6 | After Taxes on Distributions and Sales                
Prospectus [Line Items]                
Average Annual Return, Percent   5.74% 3.00%       3.80%  
Performance Inception Date Dec. 13, 2016              
[1] The Fund compares its performance against this broad-based index in response to regulatory requirements.
[2] Since Inception returns for the Indexes are measured from the month-end closest to the Fund's inception date.
[3] The Fund compares its performance against this broad-based index in response to regulatory requirements.
[4] Since Inception return for the Index is measured from the month-end closest to the inception date for Class R6 shares.
[5] Since Inception returns for the Indexes are measured from the month-end closest to the inception date for Class Z and R6 shares.
[6] The Fund compares its performance against this broad-based index in response to regulatory requirements.
[7] Since Inception returns for the Indexes are measured from the month-end closest to the Fund's inception date.
[8] The Fund compares its performance against this broad-based index in response to regulatory requirements.
[9] Since Inception returns for the Indexes are measured from the month-end closest to the Fund's inception date.
[10] Since Inception returns for the Indexes are measured from the month-end closest to the Fund's inception date.