Read the following texts and table with financial data from an S&P 500 earnings report carefully.Based on the question-answer history (if provided), answer the last question. The answer may require mathematical calculation based on the data provided.

Text: cgmhi also has substantial borrowing arrangements consisting of facilities that cgmhi has been advised are available , but where no contractual lending obligation exists . these arrangements are reviewed on an ongoing basis to ensure flexibility in meeting cgmhi 2019s short-term requirements . the company issues both fixed and variable rate debt in a range of currencies . it uses derivative contracts , primarily interest rate swaps , to effectively convert a portion of its fixed rate debt to variable rate debt and variable rate debt to fixed rate debt . the maturity structure of the derivatives generally corresponds to the maturity structure of the debt being hedged . in addition , the company uses other derivative contracts to manage the foreign exchange impact of certain debt issuances . at december 31 , 2009 , the company 2019s overall weighted average interest rate for long-term debt was 3.51% ( 3.51 % ) on a contractual basis and 3.91% ( 3.91 % ) including the effects of derivative contracts . aggregate annual maturities of long-term debt obligations ( based on final maturity dates ) including trust preferred securities are as follows: . <table class='wikitable'><tr><td>1</td><td>in millions of dollars</td><td>2010</td><td>2011</td><td>2012</td><td>2013</td><td>2014</td><td>thereafter</td></tr><tr><td>2</td><td>citigroup parent company</td><td>$ 18030</td><td>$ 20435</td><td>$ 29706</td><td>$ 17775</td><td>$ 18916</td><td>$ 92942</td></tr><tr><td>3</td><td>other citigroup subsidiaries</td><td>18710</td><td>29316</td><td>17214</td><td>5177</td><td>12202</td><td>14675</td></tr><tr><td>4</td><td>citigroup global markets holdings inc .</td><td>1315</td><td>1030</td><td>1686</td><td>388</td><td>522</td><td>8481</td></tr><tr><td>5</td><td>citigroup funding inc .</td><td>9107</td><td>8875</td><td>20738</td><td>4792</td><td>3255</td><td>8732</td></tr><tr><td>6</td><td>total</td><td>$ 47162</td><td>$ 59656</td><td>$ 69344</td><td>$ 28132</td><td>$ 34895</td><td>$ 124830</td></tr></table> long-term debt at december 31 , 2009 and december 31 , 2008 includes $ 19345 million and $ 24060 million , respectively , of junior subordinated debt . the company formed statutory business trusts under the laws of the state of delaware . the trusts exist for the exclusive purposes of ( i ) issuing trust securities representing undivided beneficial interests in the assets of the trust ; ( ii ) investing the gross proceeds of the trust securities in junior subordinated deferrable interest debentures ( subordinated debentures ) of its parent ; and ( iii ) engaging in only those activities necessary or incidental thereto . upon approval from the federal reserve , citigroup has the right to redeem these securities . citigroup has contractually agreed not to redeem or purchase ( i ) the 6.50% ( 6.50 % ) enhanced trust preferred securities of citigroup capital xv before september 15 , 2056 , ( ii ) the 6.45% ( 6.45 % ) enhanced trust preferred securities of citigroup capital xvi before december 31 , 2046 , ( iii ) the 6.35% ( 6.35 % ) enhanced trust preferred securities of citigroup capital xvii before march 15 , 2057 , ( iv ) the 6.829% ( 6.829 % ) fixed rate/floating rate enhanced trust preferred securities of citigroup capital xviii before june 28 , 2047 , ( v ) the 7.250% ( 7.250 % ) enhanced trust preferred securities of citigroup capital xix before august 15 , 2047 , ( vi ) the 7.875% ( 7.875 % ) enhanced trust preferred securities of citigroup capital xx before december 15 , 2067 , and ( vii ) the 8.300% ( 8.300 % ) fixed rate/floating rate enhanced trust preferred securities of citigroup capital xxi before december 21 , 2067 , unless certain conditions , described in exhibit 4.03 to citigroup 2019s current report on form 8-k filed on september 18 , 2006 , in exhibit 4.02 to citigroup 2019s current report on form 8-k filed on november 28 , 2006 , in exhibit 4.02 to citigroup 2019s current report on form 8-k filed on march 8 , 2007 , in exhibit 4.02 to citigroup 2019s current report on form 8-k filed on july 2 , 2007 , in exhibit 4.02 to citigroup 2019s current report on form 8-k filed on august 17 , 2007 , in exhibit 4.2 to citigroup 2019s current report on form 8-k filed on november 27 , 2007 , and in exhibit 4.2 to citigroup 2019s current report on form 8-k filed on december 21 , 2007 , respectively , are met . these agreements are for the benefit of the holders of citigroup 2019s 6.00% ( 6.00 % ) junior subordinated deferrable interest debentures due 2034 . citigroup owns all of the voting securities of these subsidiary trusts . these subsidiary trusts have no assets , operations , revenues or cash flows other than those related to the issuance , administration , and repayment of the subsidiary trusts and the subsidiary trusts 2019 common securities . these subsidiary trusts 2019 obligations are fully and unconditionally guaranteed by citigroup. .
Question: what was value of aggregate annual maturities of long-term debt obligations for the citigroup parent company in 2011?
Answer: 20435.0
Question: what was value of aggregate annual maturities of long-term debt obligations for the citigroup parent company in 2012?

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18030.0
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