How does the relationship between Europe and America change from Marshall Plan to Declaration on North Atlantic Relations?

I have graduated for many years, and I haven't read history books for a long time, so I can barely explain two sentences. Marshall Plan, because after World War II, Europe was the main battlefield, and the damage was more serious, and the Americans made a fortune in this war. However, because capitalism wants to fight against socialist consciousness, the United States wants to compete for hegemony with the Soviet Union, and it has to win over a group of younger brothers, and the ancestors of Americans are European immigrants. So America helped Europe rebuild. Later, when the confrontation intensified, this group of capitalist core countries formed NATO, and the Soviet Union was not to be outdone, wooing the younger brother of socialism to form the Warsaw Pact.

The relationship between Europe and the United States is mainly reflected in the loss of European hegemony in the world, the decline of European economy and the gradual hegemony of the United States due to its economic development in World War I and World War II.