At NBCUniversal, revenue grew 21 percent to $7.15 billion from a year earlier. Revenue at the film studio climbed 64 percent from a year earlier to $2 billion, boosted by the blockbuster film "Minions," which crossed $1 billion in revenue.
"We're about five years, 4½ years into our [NBCUniversal] partnership together here and we've just about doubled our cash flow," Roberts said. "That's probably the fastest growth rate of any of the media companies."
He acknowledged, however, that it's going to be tough next year to beat the recent string of summer box office blockbusters out of Universal Pictures.
"Jurassic World" is the biggest grossing movie of the year, with worldwide ticket sales of nearly $1.7 billion, according to Box Office Mojo. "Minions" was fourth overall with more than $1.1 billion. Earlier this year, "Furious 7," released in the spring, is No. 2 with $1.5 billion.
The Universal theme park business, with its popular "Harry Potter" attraction in Florida, saw revenue jump 14.1 percent to $458 million. Last month, Comcast said it would buy a majority stake in Universal Studios Japan for $1.5 billion.
"[Universal Studios Japan] has the same kind of growth trajectory, we hope and believe, that Universal theme parks has in Florida. And next year, we'll be opening 'Harry Potter' in California," Roberts said.
In recent months, Comcast has notified Verizon that it plans to move forward with its 2011 agreement to resell the wireless provider's cellular service in exchange for airwaves.
"We do have an opportunity ... [with] Verizon but also with Sprint to test things," Roberts said. "It requires about six months to activate it or so. We've begun that process."
The ultimate goal dovetails with Comcast's Wi-Fi investments, he said: "We want all of our content available on every device [with] ease of use [and] ease of authentication."
On Monday, the media giant announced a proposal to reclassify each share of its Class A special common stock into one share of class A common stock.
Read MoreComcast to reclassify special common stock
Disclosure: Comcast owns NBC Universal, the parent company of CNBC and CNBC.com.
— CNBC's Katie Little and Reuters contributed to this report.