An expression meaning that either way or whichever choice/situation, the outcome is the same; 'in any case' or 'either way'.
雨が降っても晴れても、どっちにしてもピクニックは中止にするよ。
Whether it rains or is sunny, either way we'll cancel the picnic.
どちらにしても提出期限は明日だから、急いで仕上げよう。
In any case, the deadline is tomorrow, so let's finish it quickly.
あの店は値段が高いか安いかはともかく、どっちにしても品揃えがいい。
Whether that shop is expensive or cheap aside, either way it has a good selection.
どっちにしても、連絡が来たらすぐ知らせてください。
Either way, please let me know as soon as you get contacted.