The move comes as scrutiny of the big tech companies deepens and widens across the federal government and US states and abroad.
The Justice Department and the Federal Trade Commission are conducting competition investigations of the companies, and state attorneys general from both major political parties have opened antitrust investigations of Google and Facebook.
The probe of Google has drawn participation by 50 states and territories.
"We have to act if we see that they're breaking the law," Rohit Chopra, one of the FTC commissioners, said Friday in an interview on CNBC.
Chopra, a Democrat, wouldn't confirm specifically names of companies that could be under investigation, but he said the agency is consulting closely with the Justice Department and the state attorneys general as their work proceeds.
Also Friday, the European Union's powerful competition chief indicated that she's looking at expanding regulations on personal data, dropping an initial hint about how she plans to use new powers against tech companies.
Margrethe Vestager said that while Europeans have control over their own data through the EU's world-leading data privacy rules, they don't address problems stemming from the way companies use other people's data "to draw conclusions about me or to undermine democracy."
The bipartisan accord marking the Judiciary antitrust inquiry contrasts with the bitter divide in the panel over the issue of impeachment of President Donald Trump.
Republicans denounced the committee Democrats' approval Thursday of ground rules for hearings, which set the stage to launch an impeachment investigation.
"Democrats followed the yellow brick road, and now they're fully lost in Impeachment Oz," said Rep. Doug Collins of Georgia, the committee's senior Republican.
The lawmakers set an October 14 deadline for the tech companies to provide the documents.
Spokesmen for Facebook, Apple and Amazon didn't respond to requests for comment Friday.
Google referred to a recent blog post by its senior vice president for global affairs, Kent Walker, saying the company is anticipating additional questions from investigations and that "We have always worked constructively with regulators and we will continue to do so."
The companies have said they'll cooperate fully with the congressional investigation.
Judiciary Committee Chairman Rep. Jerrold Nadler, D-N.Y., said the documents will help the committee understand "whether they are using their market power in ways that have harmed consumers and competition and how Congress should respond."
The letters went to the four companies' CEOs: Larry Page of Google's parent company Alphabet Inc.; Mark Zuckerberg of Facebook; Jeff Bezos of Amazon; and Tim Cook of Apple.
They were signed by Nadler and Collins; Rep. David Cicilline, D-R.I., who heads the antitrust subcommittee leading the investigation; and Rep.
James Sensenbrenner of Wisconsin, the subcommittee's senior Republican.
Cicilline has said Congress and antitrust regulators wrongly allowed the big tech companies to regulate themselves, enabling them to operate out of control, dominating the internet and choking off online innovation and entrepreneurship.
He has suggested legislative changes may be needed, though he has called breaking up the companies a last resort.
At a hearing of the antitrust panel in July, executives of the four companies pushed back against lawmakers' accusations that they operate as monopolies, laying out ways in which they say they compete fairly yet vigorously against rivals in the marketplace.
Cicilline said he was dissatisfied with the answers the executives gave to lawmakers' questions, calling their testimony "evasive."
The letter to Facebook
requests a breakdown of company profits since 2016 on its top products including Facebook
Ads, Instagram and WhatsApp.
It also seeks communications from Zuckerberg and other top executives related to a California court case in which plaintiffs accuse the company of deceptively crushing thousands of apps in 2015 whose businesses had relied on their platform.
Among other internal communications the letter seeks are those related to six messaging, video- and photo-sharing apps in particular that Facebook cut off.
The lawmakers are seeking Facebook executives' emails on the decision to deny any specific apps or categories of apps access to Facebook data about or shared by users.
This is a concern because critics say the company intentionally walled itself off from other online apps, enabling it to amass nearly 2.5 billion users with no clear competitor.
The letter to Alphabet seeks detailed financial information and names of leading competitors for Google's vast operations, including search, video service YouTube, the Android cellphone operating system and Gmail.
Internal communications the lawmakers are seeking include those related to Google's 2007 acquisition of online advertising company DoubleClick which critics often point to as pivotal to Google's advertising dominance.
For Amazon, the lawmakers seek financial data and competitor names for Amazon Web Services, smart speakers Alexa and Echo, Amazon Prime, Whole Foods and other properties, as well as on its online retail, on-demand movie and music streaming, digital advertising and cloud computing operations.
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