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 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
May 31, 2015 |
May 31, 2025 |
May 31, 2016 |
May 31, 2017 |
May 31, 2018 |
May 31, 2019 |
May 31, 2020 |
May 31, 2021 |
May 31, 2022 |
May 31, 2023 |
May 31, 2024 |
May 31, 2025 |
|
| C000058057 [Member] | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | Institutional Shares | |||||||||||
| Accumulated Value | $ 10,000 | $ 10,200 | $ 11,738 | $ 11,646 | $ 12,130 | $ 12,301 | $ 16,513 | $ 15,938 | $ 15,724 | $ 18,367 | $ 20,130 | |
| C000172902 [Member] | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | Class K Shares | |||||||||||
| Accumulated Value | 10,000 | 10,200 | 11,754 | 11,669 | 12,162 | 12,338 | 16,566 | 16,001 | 15,799 | 18,463 | 20,251 | |
| C000058059 [Member] | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | Investor C Shares (with sales charge) | |||||||||||
| C000058058 [Member] | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | Investor A Shares (with sales charge) | |||||||||||
| MSCI All Country World Index [Member] | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | MSCI All Country World Index | |||||||||||
| Accumulated Value | $ 10,000 | $ 9,458 | $ 11,116 | $ 12,432 | $ 12,271 | $ 12,937 | $ 18,351 | $ 17,106 | $ 17,252 | $ 21,315 | $ 24,225 | |