How is “sign away” used?

In Atlas Shrugged: Part I (2011), one line is: “I'll sign away my other companies, but they are not getting my metal.”

Which movie is “sign away” from?

The clip at the top of this page is from Atlas Shrugged: Part I (2011).

Phrasal verb

to lose your rights or property by signing a document

Heard in 4 movies

Definitions from the Oxford Advanced Learner's Dictionary, 9th edition

I'll sign away my other companies, but they are not getting my metal.

Said in 4 films · #1