In journalism, never write i.e. or ie. ie = id est But who knows the old Latin expression id est? Did you know? I didn't. I had to look it up. Id est is Latin for the English expression "that is". Stick to English rather than Latin. If you mean "that is", then write in English, and write "that is".
The reason this one matters so much is that "ie" and "eg" are constantly confused, even by people who use them with great confidence. They do not mean the same thing at all. "ie", id est, means "that is" or "in other words". It introduces the same thing said again more precisely. "eg", exempli gratia, means "for example", and introduces one example out of many. (If you want the partner rule, see my note on eg.)
See the difference in action. "He writes for the broadsheets (ie The Australian and the Herald)" claims those are the only two he writes for. "He writes for the broadsheets (eg The Australian)" gives one example and leaves room for others. Muddle the two and you can change the meaning of a sentence completely, and accidentally tell a lie.
This is exactly why I tell you to drop the Latin and write in plain English. If you mean "that is", write "that is" or "in other words". If you mean "for example", write "for example" or "such as". The reader understands you instantly, and you can never trip over the difference, because there is no difference to trip over.
Plain words protect you from your own mistakes. That is reason enough to use them.