NEW YORK ( TheStreet) -- With its acquisition of the Gillette Company in 2005, Procter & Gamble ( PG) added four major brands -- Gillette, Braun, Duracell and Oral-B -- to its portfolio. After the $57 billion acquisition was complete, P&G became one of the largest consumer companies in the world, ahead of players like Kimberly-Clark ( KMB) and Colgate-Palmolive ( CL). More importantly, the company gained access to a much larger portfolio of products targeting men.We estimate that the acquired businesses (Gillette, Braun, Duracell and Oral-B) constitute more than $55 billion of P&G's value. Gillette & Braun alone are worth about $45 billion and constitute more than 17% of the $84 Trefis price estimate for P&G's stock. The high value of the Gillette & Braun grooming businesses is attributable to their high market share in the grooming market and high EBITDA margins (a measure of profitability) compared to other P&G businesses.