The 14 million is because the mandate is removed.
See page 2 of the CBO report.
In short, once they aren't forced to buy insurance by the government, they decide not to. CNN apparently missed that paragraph.
Amazing how you can jack up your enrollment numbers when you penalize people for not buying insurance.
Here's the rest of the report. It's also linked in the CNN article for online reading as the first "related article" link.