Please answer the given financial question based on the context.
Context: item 6 . selected financial data the following table sets forth our selected financial data . the table should be read in conjunction with item 7 and item 8 of this annual report on form 10-k. .
|( $ in millions except per share amounts )|year ended december 31 2017|year ended december 31 2016|year ended december 31 2015|year ended december 31 2014|year ended december 31 2013|
|sales and service revenues|$ 7441|$ 7068|$ 7020|$ 6957|$ 6820|
|goodwill impairment|2014|2014|75|47|2014|
|operating income ( loss )|865|858|769|655|512|
|net earnings ( loss )|479|573|404|338|261|
|total assets|6374|6352|6024|6239|6190|
|long-term debt ( 1 )|1279|1278|1273|1562|1665|
|total long-term obligations|3225|3356|3260|3562|3277|
|net cash provided by ( used in ) operating activities|814|822|861|755|260|
|free cash flow ( 2 )|453|537|673|590|121|
|dividends declared per share|$ 2.52|$ 2.10|$ 1.70|$ 1.00|$ 0.50|
|basic earnings ( loss ) per share|$ 10.48|$ 12.24|$ 8.43|$ 6.93|$ 5.25|
|diluted earnings ( loss ) per share|$ 10.46|$ 12.14|$ 8.36|$ 6.86|$ 5.18|
( 1 ) long-term debt does not include the current portion of long-term debt , which is included in current liabilities . ( 2 ) free cash flow is a non-gaap financial measure and represents cash from operating activities less capital expenditures net of related grant proceeds . see liquidity and capital resources in item 7 for more information on this measure. .
Question: what was the return on total assets during 2013?


Answer: The answer is:0.04216