Lee A. Iacocca, the visionary automaker who ran the Ford Motor Company and then the Chrysler Corporation and came to personify Detroit as the dream factory of America’s postwar love affair with the automobile, died on Tuesday at his home in Bel Air, Calif. He was 94. He had complications from Parkinson’s disease, a family spokeswoman said.

In an industry that had produced legends, from giants like Henry Ford and Walter Chrysler to the birth of the assembly line and freedoms of the road that led to suburbia and the middle class, Mr. Iacocca, the son of an immigrant hot-dog vendor, made history as the only executive in modern times to preside over the operations of two of the Big Three automakers.