In the context of this series of interconnected finance-related queries and the additional information provided by the pretext, table data, and posttext from a company's financial filings, please provide a response to the final question. This may require extracting information from the context and performing mathematical calculations. Please take into account the information provided in the preceding questions and their answers when formulating your response:
Context: schedule iii page 6 of 6 host hotels & resorts , inc. , and subsidiaries host hotels & resorts , l.p. , and subsidiaries real estate and accumulated depreciation december 31 , 2018 ( in millions ) ( b ) the change in accumulated depreciation and amortization of real estate assets for the fiscal years ended december 31 , 2018 , 2017 and 2016 is as follows: . <table class='wikitable'><tr><td>1</td><td>balance at december 31 2015</td><td>$ 5666</td></tr><tr><td>2</td><td>depreciation and amortization</td><td>572</td></tr><tr><td>3</td><td>dispositions and other</td><td>-159 ( 159 )</td></tr><tr><td>4</td><td>depreciation on assets held for sale</td><td>-130 ( 130 )</td></tr><tr><td>5</td><td>balance at december 31 2016</td><td>5949</td></tr><tr><td>6</td><td>depreciation and amortization</td><td>563</td></tr><tr><td>7</td><td>dispositions and other</td><td>-247 ( 247 )</td></tr><tr><td>8</td><td>depreciation on assets held for sale</td><td>7</td></tr><tr><td>9</td><td>balance at december 31 2017</td><td>6272</td></tr><tr><td>10</td><td>depreciation and amortization</td><td>546</td></tr><tr><td>11</td><td>dispositions and other</td><td>-344 ( 344 )</td></tr><tr><td>12</td><td>depreciation on assets held for sale</td><td>-101 ( 101 )</td></tr><tr><td>13</td><td>balance at december 31 2018</td><td>$ 6373</td></tr></table> ( c ) the aggregate cost of real estate for federal income tax purposes is approximately $ 10458 million at december 31 , 2018 . ( d ) the total cost of properties excludes construction-in-progress properties. .
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Question: what is the balance of accumulated depreciation and amortization of real estate assets in 2016?
Answer: