A: It seems Mary has been very busy lately.

B: Yeah. The landlord has given her carte blanche to redecorate the apartment, and she’d spent a lot of time and energy on the project.

Note: This idiom means “complete freedom to do something.” The phrase from French means “blank document,” which was signed in advance by one party and given to the other with permission to fill in conditions later. Much like blank check, carte blanche also took on the extended meaning “complete freedom.”