AWS permissions to access Account and Billing info

I have an IAM user with Administrator permissions.

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Effect": "Allow",
      "Action": "*",
      "Resource": "*"
    }
  ]
}

but when I try to access "/billing" page AWS says

You are not authorized to perform this operation.
You are currently signed in as an IAM user that does not have permissions to the requested page.

I also tried to generate a specific policies like

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Sid": "Stmt1438861751000",
            "Effect": "Allow",
            "Action": [
                "aws-portal:ViewBilling"
            ],
            "Resource": [
                "*"
            ]
        }
    ]
}

But it doesn't change anything. I still can't access the billing info.

When I go to policy simulation page it says that permission is allowed for the user.

I've seen the AWS guide and tried to follow it. http://ift.tt/1ytRFa1

Is there something I'm missing? What could it be?