ACA Requirement to Report Cost of Employer Sponsored Health Care Plan

There is a requirement that certain companies must include the amount they pay for insurance employee insurance premiums on their W2s in Box 12DD. This is not an amount paid to the employee, nor is it taxable income (yet). There is a blog article that suggests adding a Benefit in GP, including the information about the W2 box on the Benefit card. But how does this work? Will the Benefit not add income to the employee's check when the benefit is used? What we need is a way to report the employer's cost of the insurance on the W2 only. Has anyone come up with a way to get the info on the W2?