FORD MOTOR CREDIT COMPANY LLC AND SUBSIDIARIES NOTES TO THE FINANCIAL STATEMENTS NOTE 14. SEGMENT AND GEOGRAPHIC INFORMATION  (Continued) Key operating data for our business segments for the years ended or at December 31 was as follows (in millions): United States and Canada Europe All Other Total Segments Unallocated Other (a) Total 2018 Total revenue $ 10,358  $ 1,160  $ 864  $ 12,382  $ —  $ 12,382  Income before income taxes 2,132  382  187  2,701  (74) 2,627  Other disclosures: Depreciation on vehicles subject to operating leases 3,934  39  —  3,973  —  3,973  Interest expense 3,183  283  470  3,936  (6) 3,930  Provision for credit losses 361  20  45  426  —  426  Net finance receivables and net investment in operating leases 121,712  26,028  7,136  154,876  (8,613) 146,263  Total assets 126,354  27,804  8,051  162,209  —  162,209  2019 Total revenue $ 10,795  $ 1,183  $ 645  $ 12,623  $ —  $ 12,623  Income before income taxes 2,365  352  143  2,860  138  2,998  Other disclosures: Depreciation on vehicles subject to operating leases 3,592  43  —  3,635  —  3,635  Interest expense 3,685  340  346  4,371  18  4,389  Provision for credit losses 260  25  11  296  —  296  Net finance receivables and net investment in operating leases (b) 119,498  25,630  5,062  150,190  (8,214) 141,976  Total assets 125,647  30,050  5,729  161,426  —  161,426  2020 Total revenue $ 10,020  $ 1,012  $ 430  $ 11,462  $ —  $ 11,462  Income before income taxes 2,241  196  38  2,475  133  2,608  Other disclosures: Depreciation on vehicles subject to operating leases 3,237  (2) —  3,235  —  3,235  Interest expense 2,892  347  223  3,462  (60) 3,402  Provision for credit losses 716  63  49  828  —  828  Net finance receivables and net investment in operating leases (b) 112,208  23,517  4,778  140,503  (8,778) 131,725  Total assets 125,962  27,620  5,435  159,017  —  159,017  (a) Finance receivables, net  and  Net investment in operating leases  include unearned interest supplements and residual support, allowance for credit losses, and other (primarily accumulated supplemental depreciation). (b) Excludes held-for-sale receivables. 100