The bold approach could put Time Warner in play and might again ignite a reshaping of the media industry, prompting a new spate of mega-mergers among the nation's largest entertainment companies.
Mr. Murdoch has built a global media juggernaut over nearly five decades spanning studios, television channels and newspapers, in part, by pursuing bold deals that were often rebuffed at first by the targets of his overtures, only to later acquiesce.
Together, Fox and Time Warner would become a colossus with an array of television networks and channels like Fox, Fox News, FX, TNT and TBS; the premium subscription channel HBO, movie studios like Twentieth Century Fox, Warner Brothers and other high-profile outlets. It would also combine Fox's growing sports business with the broadcast rights that Time Warner owns for professional and college basketball and Major League Baseball, among other sports.
The combined company would have total revenue of $65 billion.
As part of Fox's proposal to buy Time Warner, people briefed on the proposal said, Fox indicated that it would sell CNN to head off potential antitrust concerns since Fox News competes directly with CNN. Putting CNN on the auction block would likely stir up a bidding war for the news channel; both CBS and ABC, a unit of the Walt Disney Company, have long been seen as interested suitors.
Fox first approached Time Warner in early June, these people said. Chase Carey, the president of Fox and a longtime top lieutenant to Mr. Murdoch, met privately with Time Warner's chief executive, Jeff Bewkes, these people said. Later that month, Fox delivered a formal takeover proposal worth $85 in stock and cash for each Time Warner share.
At the time, the bid amounted to a roughly 25 percent premium to Time Warner's stock price, these people said. Fox indicated it would pay 60 percent of the price in stock and 40 percent in cash. The media giant said that it would raise $24 billion to help pay for the deal and stressed that its bid was not dependent on financing. At $85 a share, Fox would be paying about 12.6 times the company's earnings before interest, taxes, depreciation, and amortization last year.
Fox estimated that a combination would create $1 billion in cost savings and possibly more, primarily by cutting sales staff and back-office functions, these people said. Fox insisted in its letter that it planned to keep Time Warner's most successful managers and creative executives as well as its various channels and studios.
Time Warner's board discussed the proposal at length, the people briefed said, and early this month sent a terse letter rejecting the offer, saying that it was better off remaining independent.
Among the points of contention: The stock portion of Fox's offer would be made using nonvoting shares, these people said. Unlike Time Warner, which has no controlling shareholder, Fox is controlled by the Murdoch family and has two tiers of stock, voting and non-voting.
Representatives for Fox and Time Warner could not be immediately reached for comment.
It is unclear what Fox's next steps will be. With the disclosure of the takeover approach, pressure from Time Warner shareholders could mount on Mr. Bewkes to begin talks. About 70 percent of Time Warner shareholders, including many big mutual funds, also own shares in Fox.
While the talks between Fox and Time Warner have thus far been considered friendly, people involved in the discussions said that Mr. Murdoch is determined to buy Time Warner and is unlikely to walk away.
Mr. Murdoch has been planning the deal with his inner circle: Mr. Carey; his son James; and the company's chief financial officer, John Nallen, people briefed on the matter said.
For Mr. Murdoch, an acquisition of Time Warner might be a capstone to his long career. People close to him have long said that he sees such a combination as a natural part of a consolidating entertainment industry. Time Warner itself has been part of several of the highest-profile mergers of the past few decades, including the merger of Time and Warner in the 1980s and the disastrous $165 billion sale to America Online at the height of the dot-com boom.
Mr. Murdoch's approach follows Time Warner's spinoff of its legacy print publications, a move that some analysts have said could spur the interest of potential suitors. Beyond Fox, however, it is not clear who would have both the interest and the financial firepower to pursue a deal, though rumors briefly arose that Google was interested in some sort of partnership.
Mr. Bewkes was asked last week by Variety magazine about speculation that Fox or Google might seek a deal. He replied: "I know nothing about it."
—By CNBC anchor and New York Times reporter Andrew Ross Sorkin