You'll need one of these...
The replies so far have focussed on the operations manual. To run a "worldwide" AOC operation you'll need an aeroplane too! And you will need not only a Part B that explains how you will operate that particular aeroplane, but you will also need a continuing airworthiness program and the appropriate manuals to explain how you are going to maintain it.
The reason I point this out is that, in general, you'll need to have actual posession of the aeroplane at the point you START down the path by applying for the AOC. And, as more than one AOC applicant has discovered, you will continue to have the aeroplane parked outside your office for the considerable number of months that it takes to complete the AOC application process. And you will NOT be able to conduct a revenue flight in the aircraft until the day you have your AOC in your hand, so it sits there burning an astonishing hole in your cash flow whilst you wish the CAA could go a little bit quicker.
Would-be AOC operators have actually gone bust before they get the AOC simply from inadequately funding the cost of putting an aircraft on the ramp while they sort out the paperwork.
I suspect this is why many new AOC operators start from the basis of a wealthy private operator who already owns an aircraft and wants to add a charter revenue stream.