what was the net change in millions in the accumulated depreciation and amortization of real estate assets from 2015 to 2016?
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: .

| Balance at December 31, 2015 | $5,666 |
| :--- | :--- |
| Depreciation and amortization | 572 |
| Dispositions and other | (159) |
| Depreciation on assets held for sale | (130) |
| Balance at December 31, 2016 | 5,949 |
| Depreciation and amortization | 563 |
| Dispositions and other | (247) |
| Depreciation on assets held for sale | 7 |
| Balance at December 31, 2017 | 6,272 |
| Depreciation and amortization | 546 |
| Dispositions and other | (344) |
| Depreciation on assets held for sale | (101) |
| Balance at December 31, 2018 | $6,373 |

( 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. .

change_accumulated_depreciation = 5949 - 5666
answer = change_accumulated_depreciation