Answer:
Assurance that reports include all relevant financial and nonfinancial information.
Step-by-step explanation:
XBRL assurance can be regarded as opinions of auditor on a financial statement or other business report that is published in XBRL, this opinions of the auditors allows to know whether these published report or statement is
complete, relevant or accurate and fairly presented. An XBRL reportcan be regarded as "instance" and it is is an electronic file. It should be noted that XBRL assurance is generally expected to include all of the following
✓Assurance that the XBRL tagging is accurate and complete.
✓Assurance that the most current, standardized XBRL taxonomy is used.
✓Assurance that the underlying financial and nonfinancial data that is used in XBRL tagging is reliable.