Financial report context:
notes to consolidated financial statements under the regulatory framework for prompt corrective action applicable to gs bank usa , in order to meet the quantitative requirements for being a 201cwell-capitalized 201d depository institution , gs bank usa is required to maintain a tier 1 capital ratio of at least 6% ( 6 % ) , a total capital ratio of at least 10% ( 10 % ) and a tier 1 leverage ratio of at least 5% ( 5 % ) . gs bank usa agreed with the federal reserve board to maintain minimum capital ratios in excess of these 201cwell- capitalized 201d levels . accordingly , for a period of time , gs bank usa is expected to maintain a tier 1 capital ratio of at least 8% ( 8 % ) , a total capital ratio of at least 11% ( 11 % ) and a tier 1 leverage ratio of at least 6% ( 6 % ) . as noted in the table below , gs bank usa was in compliance with these minimum capital requirements as of december 2013 and december 2012 . the table below presents information regarding gs bank usa 2019s regulatory capital ratios under basel i , as implemented by the federal reserve board . the information as of december 2013 reflects the revised market risk regulatory capital requirements , which became effective on january 1 , 2013 . these changes resulted in increased regulatory capital requirements for market risk . the information as of december 2012 is prior to the implementation of these revised market risk regulatory capital requirements. .

Financial table:
$ in millions: tier 1 capital; as of december 2013: $ 20086; as of december 2012: $ 20704
$ in millions: tier 2 capital; as of december 2013: $ 116; as of december 2012: $ 39
$ in millions: total capital; as of december 2013: $ 20202; as of december 2012: $ 20743
$ in millions: risk-weighted assets; as of december 2013: $ 134935; as of december 2012: $ 109669
$ in millions: tier 1 capital ratio; as of december 2013: 14.9% ( 14.9 % ); as of december 2012: 18.9% ( 18.9 % )
$ in millions: total capital ratio; as of december 2013: 15.0% ( 15.0 % ); as of december 2012: 18.9% ( 18.9 % )
$ in millions: tier 1 leverage ratio; as of december 2013: 16.9% ( 16.9 % ); as of december 2012: 17.6% ( 17.6 % )

Additional report context:
the revised capital framework described above is also applicable to gs bank usa , which is an advanced approach banking organization under this framework . gs bank usa has also been informed by the federal reserve board that it has completed a satisfactory parallel run , as required of advanced approach banking organizations under the revised capital framework , and therefore changes to its calculations of rwas will take effect beginning with the second quarter of 2014 . under the revised capital framework , as of january 1 , 2014 , gs bank usa became subject to a new minimum cet1 ratio requirement of 4% ( 4 % ) , increasing to 4.5% ( 4.5 % ) in 2015 . in addition , the revised capital framework changes the standards for 201cwell-capitalized 201d status under prompt corrective action regulations beginning january 1 , 2015 by , among other things , introducing a cet1 ratio requirement of 6.5% ( 6.5 % ) and increasing the tier 1 capital ratio requirement from 6% ( 6 % ) to 8% ( 8 % ) . in addition , commencing january 1 , 2018 , advanced approach banking organizations must have a supplementary leverage ratio of 3% ( 3 % ) or greater . the basel committee published its final guidelines for calculating incremental capital requirements for domestic systemically important banking institutions ( d-sibs ) . these guidelines are complementary to the framework outlined above for g-sibs . the impact of these guidelines on the regulatory capital requirements of gs bank usa will depend on how they are implemented by the banking regulators in the united states . the deposits of gs bank usa are insured by the fdic to the extent provided by law . the federal reserve board requires depository institutions to maintain cash reserves with a federal reserve bank . the amount deposited by the firm 2019s depository institution held at the federal reserve bank was approximately $ 50.39 billion and $ 58.67 billion as of december 2013 and december 2012 , respectively , which exceeded required reserve amounts by $ 50.29 billion and $ 58.59 billion as of december 2013 and december 2012 , respectively . transactions between gs bank usa and its subsidiaries and group inc . and its subsidiaries and affiliates ( other than , generally , subsidiaries of gs bank usa ) are regulated by the federal reserve board . these regulations generally limit the types and amounts of transactions ( including credit extensions from gs bank usa ) that may take place and generally require those transactions to be on market terms or better to gs bank usa . the firm 2019s principal non-u.s . bank subsidiary , gsib , is a wholly-owned credit institution , regulated by the prudential regulation authority ( pra ) and the financial conduct authority ( fca ) and is subject to minimum capital requirements . as of december 2013 and december 2012 , gsib was in compliance with all regulatory capital requirements . goldman sachs 2013 annual report 193 .

Question: in millions , what was the change between 2013 and 2012 in tier 1 capital?
Answer: -618