Muna 1854 William Cooper akatanga sangano re accountancy muLondon, iro rakazova Cooper Brothers makore manomwe akazotevera apo hama dzake nhatu dzakabatana. Muna 1898, Robert H. Montgomery, William M. Lybrand, Adam A. Ross Jr. uye mukoma wake T. Edward Ross vakaumba Lybrand, Ross Brothers naMontgomery muUnited States. Muna 1957 Cooper Brothers; Lybrand, Bros Ross & Montgomery uye kambani yeCanada McDonald, Currie uye Co vakabvumirana kutora zita Coopers & Lybrand mune dzimwe nyika. Muna 1973 nhengo nhatu dzinoshanda muUK, US neCanada dzakashandura mazita adzo kuva Coopers & Lybrand. Zvadaro muna 1980 Coopers & Lybrand yakawedzera ruzivo rwayo mukusava nemari nekutora Cork Gully, kambani inotungamira mundima iyoyo muUK. Mune dzimwe nyika, kusanganisira UK, Coopers & Lybrand yakabatanidzwa neDeloitte Haskins & Sells muUnited States.
Coopers & Lybrand Deloitte