Overview of Detente
Détente (a French word meaning release from tension) is the name given to a period of improved relations between the United States and the Soviet Union that began tentatively in 1971 and took decisive form when President Richard M. Nixon visited the secretary-general of the Soviet Communist party, Leonid I. Brezhnev, in Moscow, May 1972.
Read more at (and the above stolen from!) History.com
Global Security – Cold War in the 1970s
CSU HSC Online – Detente
Foreign Affairs: Goodbye to Detente (1980)