Div height 100% and expands to fit content

I have a div element on my page with its height set to 100%. The height of the body is also set to 100%. The inner div has a background and all that and is different from the body background. This works for making the div height 100% of the browser screen height, but the problem is I have content inside that div that extends vertically beyond the browser screen height. When I scroll down, the div ends at the point at which you had to begin scrolling the page, but the content overflows beyond that. How do I make the div always go all the way to the bottom to fit the inner content?

Here's a simplification of my CSS:

body {
    height:100%;
    background:red;
}

#some_div {
    height:100%;
    background:black;
}

Once I scroll the page, the blackness ends and the content flows onto the red background. It doesn't seem to matter whether I set the positon to relative or absolute on the #some_div, the problem occurs either way. The content inside the #some_div is mostly absolutely positioned, and it is dynamically generated from a database so its height can't be known in advance.

Edit: Here is a screenshot of the problem:

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Here is what you should do in the CSS style, on the main div

display: block;
overflow: auto;

And do not touch height

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Set the height to auto and min-height to 100% . This should solve it for most browsers.

body {
  position: relative;
  height: auto;
  min-height: 100% !important;
}

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Usually this problem arises when the Child elements of a Parent Div are floated. Here is the Latest Solution of the problem:

In your CSS file write the following class called .clearfix along with the pseudo selector :after

.clearfix:after {
content: "";
display: table;
clear: both;
}

Then, in your HTML, add the .clearfix class to your parent Div. For example:

<div class="clearfix">
    <div></div>
    <div></div>
</div>

It should work always. You can call the class name as .group instead of .clearfix , as it will make the code more semantic. Note that, it is Not necessary to add the dot or even a space in the value of Content between the double quotation "". Also, overflow: auto; might solve the problem but it causes other problems like showing the scroll-bar and is not recommended.

Source: Blog of Lisa Catalano and Chris Coyier

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