"lengthy details" is correct and usable in written English.
It is a phrase used to describe something that is filled with a lot of details, usually more than necessary. For example, "The contract included lengthy details about the responsibilities of both parties."
Although the British medical report apparently provides lengthy details about General Pinochet's many physical ailments, such as diabetes, unsteadiness, pain in his knees, deafness and more, lawyers said it is only a person's mental fitness to stand trial that counts.
(We omit the somewhat lengthy details of the construction; see [40] for the complete description).
Without repeating here the lengthy details of the halving algorithm, it suffices to note that these alternate ways can be generated by choosing one of the vertices within each supernatural graph as a starting point.
Writer goes into lengthy detail about each of these performances praising the care that went into them, resulting in high quality.
And last week, Vanity Fair magazine released advance copies of an article about Ms. Rich, which elaborates in lengthy detail the reported excesses of Mr. Rich's past and in which Ms. Rich discusses her relationship with her ex-husband.
He wants to focus on the educational content of his work, to convey to the public what he's been learning -- in lengthy detail, information that has nothing to do with him personally.
Here, the terrible fate of the son of King Laïos and Queen Jocaste is told in lengthy detail, combining Sophocles's Oedipus Tyrannus and Oedipus at Colonus, from birth to a last walk into bright light.
Google also goes into lengthy detail to justify its decision to inform publishers when it has removed links to content on their sites — a decision which has resulted in media outlets writing new articles about delisted content, thereby resulting in the rtbf ruling causing the opposite effect to that intended (i.e. fresh publicity, not fair obscurity).
I never did anything inappropriate with Apollo, while there were friendly texts that I answered, we discussed that in lengthy detail.
Once, the director went into lengthy detail about the playing of a scene, and when he had finished, Richardson said, "Ah, I think I know what you want – a little more flute and a little less cello".
Only get into the finer, lengthier details after a client has asked for them.
