Dollar for dollar = $16.6 billion.
Prime Minister Justin Trudeau was with Freeland when the announcement was made and expressed his disbelief at the U.S. decision. He especially addressed his concern at the fact that Trump was using a national security clause in U.S. trade law to justify the decision.
That Canada could be considered a national security threat to the United States is inconceivable . . . We will continue to make arguments based on logic and common sense and hope that they eventually will prevail against an administration that doesn't always align itself around those principles.