Lend-Lease - WiKi
A total of $50.1 billion (equivalent to $650 billion today) worth of supplies were shipped. That represented 17% of the total war expenditures of the U.S.[2] In all, $31.4 billion went to Britain, $11.3 billion to the Soviet Union, $3.2 billion to France, $1.6 billion to China, and smaller sums to other Allies