management 2019s discussion and analysis liquidity risk management liquidity is of critical importance to financial institutions . most of the failures of financial institutions have occurred in large part due to insufficient liquidity . accordingly , the firm has in place a comprehensive and conservative set of liquidity and funding policies to address both firm-specific and broader industry or market liquidity events . our principal objective is to be able to fund the firm and to enable our core businesses to continue to serve clients and generate revenues , even under adverse circumstances . we manage liquidity risk according to the following principles : excess liquidity . we maintain substantial excess liquidity to meet a broad range of potential cash outflows and collateral needs in a stressed environment . asset-liability management . we assess anticipated holding periods for our assets and their expected liquidity in a stressed environment . we manage the maturities and diversity of our funding across markets , products and counterparties , and seek to maintain liabilities of appropriate tenor relative to our asset base . contingency funding plan . we maintain a contingency funding plan to provide a framework for analyzing and responding to a liquidity crisis situation or periods of market stress . this framework sets forth the plan of action to fund normal business activity in emergency and stress situations . these principles are discussed in more detail below . excess liquidity our most important liquidity policy is to pre-fund our estimated potential cash and collateral needs during a liquidity crisis and hold this excess liquidity in the form of unencumbered , highly liquid securities and cash . we believe that the securities held in our global core excess would be readily convertible to cash in a matter of days , through liquidation , by entering into repurchase agreements or from maturities of resale agreements , and that this cash would allow us to meet immediate obligations without needing to sell other assets or depend on additional funding from credit-sensitive markets . as of december 2013 and december 2012 , the fair value of the securities and certain overnight cash deposits included in our gce totaled $ 184.07 billion and $ 174.62 billion , respectively . based on the results of our internal liquidity risk model , discussed below , as well as our consideration of other factors including , but not limited to , an assessment of our potential intraday liquidity needs and a qualitative assessment of the condition of the financial markets and the firm , we believe our liquidity position as of both december 2013 and december 2012 was appropriate . the table below presents the fair value of the securities and certain overnight cash deposits that are included in our gce . average for the year ended december in millions 2013 2012 .

Table: in millions average for theyear ended december 2013 average for theyear ended december 2012 u.s . dollar-denominated $ 136824 $ 125111 non-u.s . dollar-denominated 45826 46984 total $ 182650 $ 172095

the u.s . dollar-denominated excess is composed of ( i ) unencumbered u.s . government and federal agency obligations ( including highly liquid u.s . federal agency mortgage-backed obligations ) , all of which are eligible as collateral in federal reserve open market operations and ( ii ) certain overnight u.s . dollar cash deposits . the non- u.s . dollar-denominated excess is composed of only unencumbered german , french , japanese and united kingdom government obligations and certain overnight cash deposits in highly liquid currencies . we strictly limit our excess liquidity to this narrowly defined list of securities and cash because they are highly liquid , even in a difficult funding environment . we do not include other potential sources of excess liquidity , such as less liquid unencumbered securities or committed credit facilities , in our gce . goldman sachs 2013 annual report 83 .

Question: as of december 2013 and december 2012 , what was the average fair value of the securities and certain overnight cash deposits included in gce , in billions?
Answer: 179.35
Calculation: divide(add(184.07, 174.62), const_2)