Following his visit to China, Nixon met with Soviet leaders, including Brezhnev in Moscow. These Strategic Arms Limitation Talks resulted in two landmark arms control treaties: SALT I, the first comprehensive limitation pact signed by the two superpowers, and the Anti-Ballistic Missile Treaty, which banned the development of systems designed to intercept incoming missiles. These aimed to limit the development of costly anti-ballistic missiles and nuclear missiles.

Nixon and Brezhnev proclaimed a new era of "peaceful coexistence" and established the groundbreaking new policy of détente (or cooperation) between the two superpowers. Meanwhile, Brezhnev attempted to revive the Soviet economy, which was declining in part because of heavy military expenditures. Between 1972 and 1974, the two sides also agreed to strengthen their economic ties, including agreements for increased trade. As a result of their meetings, détente would replace the hostility of the Cold War and the two countries would live mutually. These developments coincided with Bonn's "Ostpolitik" policy formulated by the West German Chancellor Willy Brandt, an effort to normalize relations between West Germany and Eastern Europe. Other agreements were concluded to stabilize the situation in Europe, culminating in the Helsinki Accords signed at the Conference on Security and Co-operation in Europe in 1975.

Kissinger and Nixon were "realists" who deemphasized idealistic goals like anti-communism or promotion of democracy worldwide because those goals were too expensive in terms of America's economic capabilities. Instead of a Cold War they wanted peace, trade and cultural exchanges. They realized that Americans were no longer willing to tax themselves for idealistic foreign policy goals, especially for containment policies that never seemed to produce positive results. Instead, Nixon and Kissinger sought to downsize America's global commitments in proportion to its reduced economic, moral and political power. They rejected "idealism" as impractical and too expensive, and neither man showed much sensitivity to the plight of people living under Communism. Kissinger's realism fell out of fashion as idealism returned to American foreign policy with Carter's moralism emphasizing human rights, and Reagan's rollback strategy aimed at destroying Communism.