think nothing of doing
think nothing of (doing something)
To not consider doing something to be at all odd, difficult, improper, or otherwise out of the ordinary. My brother earns so much money that he thinks nothing of spending $300 on a single meal. People in this country think nothing of eating every part of an animal, which is something I've never been able to stomach.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
think nothing of doing something
to give no thought or hesitation to doing something. She thinks nothing of helping other people at any time of day or night. Toby thinks nothing of driving one block to the store.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.