Regulation S-X Rule 5-02.32 provides the total liabilities and equity caption that closes a commercial company's balance sheet, following the captions for liabilities, redeemable preferred stock, non-redeemable preferred stock, common stock, other stockholders' equity, and noncontrolling interests. In XBRL it is tagged LiabilitiesAndStockholdersEquity, and the SEC's taxonomy defines it to include the noncontrolling interest portion of equity. Because it must match total assets, the XBRL value for this element and for Assets should be identical in any given filing.
Since the total is fixed by the accounting equation, the interesting information lies in its composition. Two companies with the same total can have very different financial risk depending on how much is debt, how much is operating liabilities such as payables and deferred revenue, and how much is equity. Temporary equity, shown between liabilities and equity, is part of this total but not of either component. So adding total liabilities and total equity can fall short of the balance sheet total when a company has redeemable securities outstanding.
Analysts rarely use the figure on its own. It is mainly a check that a data set is complete and internally consistent: if assets do not match liabilities and equity, a line has been missed or misclassified. It is also a convenient denominator for common-size analysis of the financing side, showing debt, payables, and equity each as a percentage of the total.