Although a 2-0 lead famously proved inadequate recently against Manchester United, City never looked like throwing victory away against a far inferior Swansea side.
City's 29th victory of their title-winning season put them within five points of Chelsea's Premier League record. They witnessed a masterclass from their freshly crowned champions on a jubilant afternoon. De Bruyne - City's player of the season - warmed Fabianski's fingers with a left-foot zinger.
And when you consider their final four home games are against teams in the bottom eight, and they have scored three or more goals in 19 of their 34 League games, there is every chance they will do it.
City's outstanding Premier League campaign to date has been noticed by their fellow professionals, with David Silva, Leroy Sane and De Bruyne up for the main PFA award along with Harry Kane, David De Gea and Mohamed Salah.
The Spain playmaker was the conductor-in-chief on a day City's players were given a guard of honor as they walked onto the field and were serenaded with songs throughout the latest one-sided game involving Guardiola's side.
More displays like that of David Silva against Swansea and those records will easily be caught.
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Raheem Sterling set up David Silva for the opening goal after 12 minutes, with the England winger netting the second four minutes later from close range after Fabian Delph cut the ball across.
In other words, the traditional adage in English football is that the best teams combine being a joy to watch with a capacity to scrap and get results in tough circumstances. Jesus took over spot-kick duties from Ilkay Gundogan, who scored one last weekend against Tottenham, but saw his effort tipped onto the post, only for Bernardo Silva to tap in the rebound. I wasn't happy after half an hour but after 30 mins we started to play a little more.
"You have to keep improving, if you think "okay, we are already champions", we are done, you can not play like the way we played today". There was also time for another goal with Yaya Toure rolling back the years with a sumptuous pass to pick out Jesus for a header, moments before a good-natured pitch invasion at full time.
Swansea are without a win in five league matches and remain four points above the relegation zone with four games to play.
Carlos Carvalhal made one adjustment - Luciano Narsingh being replaced by Mike van der Hoorn, as the manager continued Swansea City's survival bid.