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 | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Jul. 31, 2016 |
Jul. 31, 2026 |
Jul. 31, 2017 |
Jul. 31, 2018 |
Jul. 31, 2019 |
Jul. 31, 2020 |
Jul. 31, 2021 |
Jul. 31, 2022 |
Jul. 31, 2023 |
Jul. 31, 2024 |
Jul. 31, 2025 |
Jul. 31, 2026 |
|||||
| C000009519 [Member] | ||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||
| Line Graph and Table Measure Name | Davis New York Venture Fund (Class Y) | |||||||||||||||
| Accumulated Value | $ 5,000,000 | $ 6,023,099 | $ 7,022,400 | $ 6,971,569 | $ 6,933,541 | $ 9,774,729 | $ 8,055,687 | $ 9,937,569 | $ 11,914,084 | $ 13,472,087 | $ 17,623,721 | |||||
| C000009520 [Member] | ||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||
| Line Graph and Table Measure Name | Davis New York Venture Fund (Class R) | |||||||||||||||
| Accumulated Value | 500,000 | 598,939 | 694,467 | 685,854 | 678,608 | 951,426 | 779,941 | 958,077 | 1,142,250 | 1,284,595 | 1,671,930 | |||||
| C000009518 [Member] | ||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||
| Line Graph and Table Measure Name | Davis New York Venture Fund (Class C) — With CDSC | |||||||||||||||
| Accumulated Value | [1] | 10,000 | 11,918 | 13,753 | 13,512 | 13,300 | 18,552 | 15,129 | 18,462 | 21,892 | 24,691 | 32,230 | ||||
| C000009516 [Member] | ||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||
| Line Graph and Table Measure Name | Davis New York Venture Fund (Class A) — With sales charge | |||||||||||||||
| Accumulated Value | [2] | 9,525 | 11,441 | 13,301 | 13,174 | 13,071 | 18,382 | 15,115 | 18,597 | 22,240 | 25,083 | 32,741 | ||||
| Standard And Poor s 500 C000009519 Index [Member] | ||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||
| Accumulated Value | 5,000,000 | 5,802,000 | 6,744,245 | 7,283,110 | 8,154,170 | 11,126,365 | 10,610,102 | 11,991,537 | 14,647,662 | 17,039,625 | 20,373,255 | |||||
| Standard And Poor s 500 C000009520 Index [Member] | ||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||
| Accumulated Value | 500,000 | 580,200 | 674,424 | 728,311 | 815,417 | 1,112,636 | 1,061,010 | 1,199,154 | 1,464,766 | 1,703,963 | 2,037,325 | |||||
| Standard & Poor's 500 Index [Member] | ||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||
| Line Graph and Table Measure Name | S&P 500 Index | |||||||||||||||
| Accumulated Value | 10,000 | 11,604 | 13,488 | 14,566 | 16,308 | 22,253 | 21,220 | 23,983 | 29,295 | 34,079 | 40,747 | |||||
| Russell 1000 Value C000009519 Index [Member] | ||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||
| Accumulated Value | 5,000,000 | 5,688,149 | 6,230,801 | 6,554,654 | 6,160,633 | 8,583,237 | 8,460,625 | 9,161,306 | 10,517,131 | 11,441,911 | 15,010,880 | |||||
| Russell 1000 Value C000009520 Index [Member] | ||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||
| Accumulated Value | 500,000 | 568,815 | 623,080 | 655,465 | 616,063 | 858,324 | 846,063 | 916,131 | 1,051,713 | 1,144,191 | 1,501,088 | |||||
| Russell 1000 Value Index [Member] | ||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||
| Line Graph and Table Measure Name | Russell 1000 Value Index | |||||||||||||||
| Accumulated Value | $ 10,000 | $ 11,376 | $ 12,462 | $ 13,109 | $ 12,321 | $ 17,166 | $ 16,921 | $ 18,323 | $ 21,034 | $ 22,884 | $ 30,022 | |||||
| ||||||||||||||||