with open arms
if you do something with open arms, you show that you are happy to see someone or eager to accept an idea, plan

[TahlilGaran] Dictionary of Contemporary English ▲

with open arms
greet/welcome (someone/something) with open arms
to be very pleased to see someone, or to be very pleased with something new.
I was rather nervous about meeting my boyfriend's parents, but they welcomed me with open arms.

Our company greeted the arrival of the Internet with open arms.

with happiness or enthusiasm.
After suing the organization, I know I'm not going to be greeted with open arms.

Usage notes: often used with the verb welcome:
A lot of our customers wouldn't be welcomed with open arms in other stores.

[TahlilGaran] English Idioms Dictionary ▲

with open arms
greet someone warmly or eagerly; glad to see someone
My aunt and uncle were at the airport to greet us with open arms.

The author was welcomed with open arms when he came to visit the city.

[TahlilGaran] English Idioms Dictionary ▲

with open arms
adv. phr.
1. With the arms spread wide for hugging or catching.
When Father came home from work, little Sally ran out to meet him with open arms.
Dick stood under the window with open arms, and Jean dropped the bag of laundry down to him.
2. With words or actions showing that you are glad to see someone; gladly, warmly, eagerly.
When Grandmother came to visit us at Christmas, we welcomed her with open arms.
After his pioneering flight in the Friendship VII, Col. John Glenn was welcomed with open arms' by the people of his hometown.

[TahlilGaran] English Idioms Dictionary ▲