SUMMARY
The difference between Tesla, Inc.'s "Business combinations, net of cash acquired"
figures for fiscal years 2016 and 2018 seems a result of the issuer adopting an accounting policy change in fiscal year 2018 and applying it retrospectively.
In short, the restricted cash figure as reported in the issuer's 2016 statement of cash flows, which relates to an acquisition, was a net figure that was accounted as a non-cash or -cash equivalent item in the statement of cash flows. Hence, an increase in the item's balance was displayed as a use of cash. Since implementing the accounting rule change, the item is consolidated with cash and cash equivalents thus an increase in its balance is a source of cash.
DETAILS
As explained in the issuer's 2016 10-K (bold font added for emphasis):
In November 2016, the FASB issued ASU No. 2016-18, Statement of Cash Flows: Restricted Cash (Topic 230). The ASU requires that a statement of cash flows explain the change during the period in the total of cash, cash equivalents, and amounts generally described as restricted cash or restricted cash equivalents. Therefore, amounts generally described as restricted cash and restricted cash equivalents should be included with cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts shown on the statement of cash flows. The ASU is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2017, with early adoption permitted. We are currently evaluating the potential impact of adopting the ASU on our consolidated financial statements.
The issuer's 10-K filing for fiscal year 2017 notes :
In November 2016, the FASB issued ASU No. 2016-18, Statement of Cash Flows: Restricted Cash, which requires entities to present the aggregate changes in cash, cash equivalents, restricted cash and restricted cash equivalents in the statement of cash flows. As a result, the statement of cash flows will be required to present restricted cash and restricted cash equivalents as a part of the beginning and ending balances of cash and cash equivalents. The ASU is effective for interim and annual periods beginning after December 15, 2017. Adoption of the ASU is retrospective. We will adopt the ASU on January 1, 2018, which will result in restricted cash being combined with unrestricted cash reconciling beginning and ending balances.
The issuer's 10-K filing for fiscal year 2018 notes that the accounting rule change was adopted and implemented for reporting the year and retrospectively (bold font added for emphasis):
In November 2016, the FASB issued ASU No. 2016-18, Statement of Cash Flows: Restricted Cash, which requires entities to present the aggregate changes in cash, cash equivalents, restricted cash and restricted cash equivalents in the statement of cash flows. As a result, the statement of cash flows now presents restricted cash and restricted cash equivalents as a part of the beginning and ending balances of cash and cash equivalents. The ASU is effective for interim and annual periods beginning after December 15, 2017. Adoption of the ASU is retrospective. We adopted the ASU on January 1, 2018, which resulted in restricted cash being combined with unrestricted cash reconciling beginning and ending balances. Refer to the Restricted Cash section for the reconciliation.
REFERENCES
Tesla, Inc.'s Form 10-K filings are found here: