What's the meaning of CPU status in top, vmstat, mpstat ?

Issue

• What's the meaning of CPU status in top, vmstat, mpstat ?

vmstat:

procs -----------memory---------- ---swap-- -----io---- --system-- -----cpu-----
 r  b   swpd   free   buff  cache   si   so    bi    bo   in   cs **us sy id wa st**
 0  1   5664     98552   135756  86704    0    0       0     3     21   31  **0  0  100  0  0**
(..omit..)

top:

Tasks: 302 total,   1 running, 301 sleeping,   0 stopped,   0 zombie
**Cpu(s):  2.1%us,  0.7%sy,  0.0%ni, 96.8%id,  0.4%wa,  0.0%hi,  0.0%si,  0.0%st**
(..omit..)

mpstat:

11:56:56     CPU    **%usr   %nice    %sys %iowait    %irq   %soft  %steal  %guest   %idle**
11:56:56     all    **2.10    0.00    0.66    0.39    0.00    0.01    0.00    0.00   96.85**