"They are so special. To come through this season, with all the restrictions and difficulties we've faced - and show the consistency we have is remarkable. It is relentless.
It is City's second trophy in a little over two weeks after they beat Tottenham to claim the Carabao Cup and they are also in their first Champions League final after beating Paris St-Germain in midweek.
Since being taken over by the Abu Dhabi Group in September 2008, City have won 12 cups and this is the third time they have clinched a league and EFL Cup double.
Guardiola's side finished 18 points behind Liverpool last season, and after losing another key player from recent success in David Silva, Guardiola needed to act.