Table:
|  |  | Adjustments due to | Adjustments due to | Adjustments due to |  |
| --- | --- | --- | --- | --- | --- |
| (dollars in millions) | At December 31, 2017 | Topic 606 | ASU 2018-02 | Other ASUs | At January 1, 2018 |
| Retained earnings | 35,635 | 2,890 | (652) | (6) | 37,867 |
| Accumulated other comprehensive income | 2,659 | — | 652 | (22) | 3,289 |
| Noncontrolling interests | 1,591 | 44 | — | — | 1,635 |
Paragraphs:
Opening Equity Balance Sheet Adjustments from Accounting Standards Adopted in 2018
On January 1, 2018, we adopted Topic 606, ASU 2018-02, Income Statement-Reporting Comprehensive Income and other ASUs. We adopted Topic 606 using the modified retrospective method. We early adopted ASU 2018-02, which allows a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from Tax Cuts and Jobs Act (TCJA).
The cumulative after-tax effect of the changes made to our consolidated balance sheet for the adoption of Topic 606, ASU 2018-02 and other ASUs was as follows:
Question:
Which method was used for adopting Topic 606?
Answer: the modified retrospective method.