v3.26.3
PGIM Target Date 2020 Fund Average Annual Total Returns
 12 Months Ended 13 Months Ended 60 Months Ended 73 Months Ended 99 Months Ended 100 Months Ended 109 Months Ended 120 Months Ended
Jul. 31, 2026
Dec. 31, 2025
Dec. 31, 2025
 [2],[3]
Dec. 31, 2025
Dec. 31, 2025
 [4],[5]
Dec. 31, 2025
 [6],[7],[8]
Dec. 31, 2025
 [9],[10]
Dec. 31, 2025
Dec. 31, 2025
 [8]
S&P 500 Index[Member]                  
Prospectus [Line Items]                  
Average Annual Return, Percent   17.88% [1],[2] 13.83% 14.42% [1] 15.08% 14.76% 14.88% 15.24% [1],[11] 14.82%
Bloomberg US Aggregate Bond Index[Member]                  
Prospectus [Line Items]                  
Average Annual Return, Percent   7.30% [1],[2] 5.11% (0.36%) [1] 0.91%   1.66% 1.93% [1],[11]  
S&P Target Date 2020 Index[Member]                  
Prospectus [Line Items]                  
Average Annual Return, Percent   12.72%   5.35%       6.86% [12]  
PGIM Target Date 2020 Custom Benchmark[Member]                  
Prospectus [Line Items]                  
Average Annual Return, Percent   11.26%   5.12%       6.40% [12]  
R1                  
Prospectus [Line Items]                  
Average Annual Return, Percent   10.39%   4.53%       5.51%  
Performance Inception Date Dec. 13, 2016                
R2                  
Prospectus [Line Items]                  
Average Annual Return, Percent   10.66%   4.80%       5.77%  
Performance Inception Date Dec. 13, 2016                
R3                  
Prospectus [Line Items]                  
Average Annual Return, Percent   10.81%   4.94%       5.93%  
Performance Inception Date Dec. 13, 2016                
R4                  
Prospectus [Line Items]                  
Average Annual Return, Percent   10.90%   5.06%       6.04%  
Performance Inception Date Dec. 13, 2016                
R5                  
Prospectus [Line Items]                  
Average Annual Return, Percent   11.12%   5.17%       6.15%  
Performance Inception Date Dec. 13, 2016                
R6                  
Prospectus [Line Items]                  
Average Annual Return, Percent   11.23%   5.32%       6.26%  
Performance Inception Date Dec. 13, 2016                
R6 | After Taxes on Distributions                  
Prospectus [Line Items]                  
Average Annual Return, Percent   9.30%   2.65%       4.30%  
Performance Inception Date Dec. 13, 2016                
R6 | After Taxes on Distributions and Sales                  
Prospectus [Line Items]                  
Average Annual Return, Percent   6.81%   3.16%       4.23%  
Performance Inception Date Dec. 13, 2016                
[1] The Fund compares its performance against this broad-based index in response to regulatory requirements.
[2] The Fund compares its performance against this broad-based index in response to regulatory requirements.
[3] Since Inception returns for the Indexes are measured from the month-end closest to the Fund's inception date.
[4] Since Inception returns for the Indexes are measured from the month-end closest to the Fund's inception date.
[5] The Fund compares its performance against this broad-based index in response to regulatory requirements.
[6] Since Inception return for the Index is measured from the month-end closest to the inception date for Class R6 shares.
[7] Since Inception returns for the Indexes are measured from the month-end closest to the inception date for Class Z and R6 shares.
[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] The Fund compares its performance against this broad-based index in response to regulatory requirements.
[11] Since Inception returns for the Indexes are measured from the month-end closest to the Fund's inception date.
[12] Since Inception returns for the Indexes are measured from the month-end closest to the Fund's inception date.