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, 2016 |
May 31, 2026 |
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 |
May 31, 2026 |
|
| C000166019 [Member] | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | Class K Shares | |||||||||||
| Accumulated Value | $ 10,000 | $ 11,847 | $ 13,821 | $ 14,165 | $ 15,903 | $ 23,151 | $ 22,504 | $ 22,826 | $ 29,514 | $ 33,027 | $ 43,817 | |
| C000160935 [Member] | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | Investor C Shares (with sales charge) | |||||||||||
| Accumulated Value | 10,000 | 11,724 | 13,535 | 13,722 | 15,246 | 21,975 | 21,143 | 21,211 | 27,153 | 30,307 | 40,071 | |
| C000160934 [Member] | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | Investor A Shares (with sales charge) | |||||||||||
| Accumulated Value | 9,475 | 11,185 | 13,016 | 13,292 | 14,883 | 21,601 | 20,934 | 21,169 | 27,287 | 30,457 | 40,269 | |
| C000160936 [Member] | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | Institutional Shares | |||||||||||
| Accumulated Value | 10,000 | 11,835 | 13,816 | 14,141 | 15,872 | 23,099 | 22,434 | 22,743 | 29,400 | 32,885 | 43,601 | |
| Russell 1000 Index [Member] | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | Russell 1000 Index | |||||||||||
| Accumulated Value | $ 10,000 | $ 11,748 | $ 13,462 | $ 13,929 | $ 15,675 | $ 22,363 | $ 21,757 | $ 22,290 | $ 28,533 | $ 32,451 | $ 41,812 | |