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REGULATORY MATTERS - Capital and Capital Ratio Information (Details) - USD ($) $ in Millions | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Common Equity Tier 1 to Risk-Weighted Assets (Amount) |  |  |
Actual | [1] | $ 14,485 | $ 14,309
Minimum Capital Adequacy | [1] | $ 8,683 | $ 7,342
Common Equity Tier 1 to Risk-Weighted Assets (Ratio) |  |  |
Actual | [1] | 10.60% | 11.20%
Minimum Capital Adequacy | [1],[2] | 6.375% | 5.75%
Tier 1 Capital to Risk-Weighted Assets (Amount) |  |  |
Actual | [3] | $ 15,325 | $ 14,556
Minimum Capital Adequacy | [3] | $ 10,726 | $ 9,258
Tier 1 Capital to Risk-Weighted Assets (Ratio) |  |  |
Actual | [3] | 11.30% | 11.40%
Minimum Capital Adequacy | [2],[3] | 7.875% | 7.25%
Total Capital to Risk-Weighted Assets (Amount) |  |  |
Actual | [4] | $ 18,157 | $ 17,781
Minimum Capital Adequacy | [4] | $ 13,450 | $ 11,812
Total Capital to Risk-Weighted Assets (Ratio) |  |  |
Actual | [4] | 13.30% | 13.90%
Minimum Capital Adequacy | [2],[4] | 9.875% | 9.25%
Tier 1 Capital to Average Assets (Leverage) (Amount) |  |  |
Actual | [5] | $ 15,325 | $ 14,556
Minimum Capital Adequacy | [5] | $ 6,121 | $ 5,824
Tier 1 Capital to Average Assets (Leverage) (Ratio) |  |  |
Actual | [5] | 10.00% | 10.00%
Minimum Capital Adequacy | [2],[5] | 4.00% | 4.00%
Capital conservation buffer |  | 1.875% | 1.25%
[1] | “Common equity tier 1 capital ratio” represents CET1 capital divided by total risk-weighted assets as defined under U.S. Basel III Standardized approach.
[2] | “Minimum Capital ratio” includes capital conservation buffer of 1.875% for 2018 and 1.25% for 2017; N/A to Tier 1 leverage.
[3] | “Tier 1 capital ratio” is tier 1 capital, which includes CET1 capital plus non-cumulative perpetual preferred equity that qualifies as additional tier 1 capital, divided by total risk-weighted assets as defined under U.S. Basel III Standardized approach.
[4] | “Total capital ratio” is total capital divided by total risk-weighted assets as defined under U.S. Basel III Standardized approach.
[5] | “Tier 1 leverage ratio” is tier 1 capital divided by quarterly average total assets as defined under U.S. Basel III Standardized approach.

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