The document is here.
There is a lot in it and the extracts here just focus on one element of it: a 1991 transfer pricing agreement that was done on a cost-plus basis, i.e. the profit attributed to the Irish operation was based on the costs incurred by the Irish operation. This is not an unusual transfer pricing basis and, as expected, the amounts involved are relatively small, i.e. not billions.
The quirk is the structure of the agreement. For example the 1991 agreement for Apple Operations Europe was [from paragraph 31]:
According to that ruling, the net profit attributable to the AOE branch would be calculated as 65% of operating expenses up to an annual amount of USD [60-70] million and 20% of operating expenses in excess of USD [60-70] million.
In the notes of a meeting (attendees not provided) it was said that (paragraph 37):
Following further discussions it was agreed that, subject to receiving a satisfactory outcome to the capital allowance question, to accept a mark-up of 65% of the costs attributable to the Irish branch. In addition it was agreed to accept a mark-up of 20% on costs in excess of $[60-70]m in order not to prohibit the expansion of the Irish operations.
On the two margins applied the Commission notes the following (paragraph 63):
Second, the margin on branch costs agreed in the 1991 ruling, as described at recital (31), is either 65% or 20% depending on whether the operating costs are below or above USD [60-70] million. According to the excerpt at recital (37), the reduction of the margin after a certain level above USD [60-70] million would have been motivated by employment considerations, which is not a reasoning based on the arm’s length principle. In particular, the two margins of 20% and 65% are relatively far apart and, should the margin of 65% effectively constitute an arm’s length pricing, the margin of 20% would be unlikely to fall within the same range of pricing, while applying the same degree of prudence.
There are other elements as well including transfer pricing for some intellectual property that can be explored in the document.