maintenance and contract expenses incurred by our subsidiaries for external transportation services ) ; materials used to maintain the railroad 2019s lines , structures , and equipment ; costs of operating facilities jointly used by uprr and other railroads ; transportation and lodging for train crew employees ; trucking and contracting costs for intermodal containers ; leased automobile maintenance expenses ; and tools and supplies . expenses for contract services increased $ 103 million in 2012 versus 2011 , primarily due to increased demand for transportation services purchased by our logistics subsidiaries for their customers and additional costs for repair and maintenance of locomotives and freight cars . expenses for contract services increased $ 106 million in 2011 versus 2010 , driven by volume-related external transportation services incurred by our subsidiaries , and various other types of contractual services , including flood-related repairs , mitigation and improvements . volume-related crew transportation and lodging costs , as well as expenses associated with jointly owned operating facilities , also increased costs compared to 2010 . in addition , an increase in locomotive maintenance materials used to prepare a portion of our locomotive fleet for return to active service due to increased volume and additional capacity for weather related issues and warranty expirations increased expenses in 2011 . depreciation 2013 the majority of depreciation relates to road property , including rail , ties , ballast , and other track material . a higher depreciable asset base , reflecting ongoing capital spending , increased depreciation expense in 2012 compared to 2011 . a higher depreciable asset base , reflecting ongoing capital spending , increased depreciation expense in 2011 compared to 2010 . higher depreciation rates for rail and other track material also contributed to the increase . the higher rates , which became effective january 1 , 2011 , resulted primarily from increased track usage ( based on higher gross ton-miles in 2010 ) . equipment and other rents 2013 equipment and other rents expense primarily includes rental expense that the railroad pays for freight cars owned by other railroads or private companies ; freight car , intermodal , and locomotive leases ; and office and other rent expenses . increased automotive and intermodal shipments , partially offset by improved car-cycle times , drove an increase in our short-term freight car rental expense in 2012 . conversely , lower locomotive lease expense partially offset the higher freight car rental expense . costs increased in 2011 versus 2010 as higher short-term freight car rental expense and container lease expense offset lower freight car and locomotive lease expense . other 2013 other expenses include personal injury , freight and property damage , destruction of equipment , insurance , environmental , bad debt , state and local taxes , utilities , telephone and cellular , employee travel , computer software , and other general expenses . other costs in 2012 were slightly higher than 2011 primarily due to higher property taxes . despite continual improvement in our safety experience and lower estimated annual costs , personal injury expense increased in 2012 compared to 2011 , as the liability reduction resulting from historical claim experience was less than the reduction in 2011 . higher property taxes , casualty costs associated with destroyed equipment , damaged freight and property and environmental costs increased other costs in 2011 compared to 2010 . a one-time payment of $ 45 million in the first quarter of 2010 related to a transaction with csxi and continued improvement in our safety performance and lower estimated liability for personal injury , which reduced our personal injury expense year-over-year , partially offset increases in other costs . non-operating items millions 2012 2011 2010 % (  % ) change 2012 v 2011 % (  % ) change 2011 v 2010 .

Table:
millions | 2012 | 2011 | 2010 | % (  % ) change 2012 v 2011 | % (  % ) change 2011 v 2010
other income | $ 108 | $ 112 | $ 54 | ( 4 ) % (  % ) | 107% ( 107 % )
interest expense | -535 ( 535 ) | -572 ( 572 ) | -602 ( 602 ) | -6 ( 6 ) | -5 ( 5 )
income taxes | -2375 ( 2375 ) | -1972 ( 1972 ) | -1653 ( 1653 ) | 20% ( 20 % ) | 19% ( 19 % )
other income 2013 other income decreased in 2012 versus 2011 due to lower gains from real estate sales and higher environmental costs associated with non-operating properties , partially offset by an interest payment from a tax refund. .

Question: what was the change in other income from 2011 to 2012 in millions?
Answer: -4
Calculation: subtract(108, 112)