particulars; details; specified items
「細目」 has another reading with different meanings.
narrow eyes; half-open eyes
契約の細目をご確認ください。
Please check the particulars of the contract.
予算には細目まで記載が必要だ。
The budget must include even the itemized details.
委員会で提案書の細目にわたって検討した。
The committee examined the proposal's particulars in detail.