| **BUSINESS SEGMENT INFORMATION (Tables)** | 6 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             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| **Segment Reporting [Abstract]**          |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  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| Schedule of Segment Reporting Information | The following tables present certain information regarding the Company’s segments.             For the Three-Month Period EndedSHUSA Reportable Segments    June 30, 2016Consumer and Business BankingCommercial BankingCommercial Real Estate Global Corporate BankingOther(2) SC(3)SC Purchase Price Adjustments(4)Eliminations(4) Total (in thousands)Net interest income$268,942$88,687$72,210$61,051$(91,636) $1,129,637$52,082$4,470 $1,585,443Total non-interest income169,52513,4243,12415,96739,646 372,22415,487(13,836) 615,561Provision/(release)  for credit losses19,836(8,803)8,280(16,420)(3,145) 511,92185,640— 597,309Total expenses414,99244,84713,32520,466168,471 552,37713,898(12,389) 1,215,987Income/(loss) before income taxes3,63966,06753,72972,972(217,316) 437,563(31,969)3,023 387,708            Intersegment revenue/(expenses)(1)815818782(2,610)195 ——— —Total assets21,074,56512,364,49815,440,55111,968,43228,240,037 37,382,811—— 126,470,894(1)Intersegment revenue/(expense) represents charges or credits for funds used or provided by each of the segments and is included in net interest income.(2)Other is not considered a segment and includes earnings from non-strategic assets, the investment portfolio, interest expense on the Bank’s and the Parent Company's borrowings and other debt obligations, amortization of intangible assets and certain unallocated corporate income and indirect expenses.(3)Management of SHUSA manages SC by analyzing the pre-Change in Control results of SC as disclosed in this column.(4)Purchase Price Adjustments represents the impact that SC purchase marks had on the results of SC included within the consolidated operations of SHUSA, while eliminations eliminate intercompany transactions.NOTE 17. BUSINESS SEGMENT INFORMATION (continued)For the Six-Month Period EndedSHUSA Reportable Segments    June 30, 2016Consumer and Business BankingCommercial BankingCommercial Real Estate Global Corporate BankingOther(2) SC(3)SC Purchase Price Adjustments(4)Eliminations(4) Total (in thousands)Net interest income/(loss)$487,330$165,872$136,967$121,369$(113,041) $2,293,215$103,852$5,931 $3,201,495Total non-interest income356,79126,0265,18633,23462,413 725,41529,269(25,072) 1,213,262Provision for credit losses20,33252,85920,96031,376(5,833) 1,172,091187,803— 1,479,588Total expenses823,45789,44332,92455,418312,432 1,080,03428,629(25,325) 2,397,012Income/(loss) before income taxes33249,59688,26967,809(357,227) 766,505(83,311)6,184 538,157            Intersegment revenue/(expense)(1)1,3631,8081,282(4,719)266 ——— —Total assets21,074,56512,364,49815,440,55111,968,43228,240,037 37,382,811—— 126,470,894            (1)Intersegment revenue/(expense) represents charges or credits for funds used or provided by each of the segments and is included in net interest income.(2)Other is not considered a segment and includes earnings from non-strategic assets, the investment portfolio, interest expense on the Bank’s and the Parent Company's borrowings and other debt obligations, amortization of intangible assets and certain unallocated corporate income and indirect expenses.(3)Management of SHUSA manages SC by analyzing the pre-Change in Control results of SC as disclosed in this column.(4)Purchase Price Adjustments represents the impact that SC purchase marks had on the results of SC included within the consolidated operations of SHUSA, while eliminations eliminate intercompany transactions.             For the Three-Month Period EndedSHUSA Reportable Segments    June 30, 2015Consumer and Business BankingCommercial BankingCommercial Real Estate Global Corporate BankingOther(2) SC(3)SC Purchase Price Adjustments(4)Eliminations(4) Total (in thousands)Net interest income$208,229$68,150$69,503$54,083$(13,311) $1,183,603$156,464$58 $1,726,779Total non-interest income199,37311,6158,33125,42020,832 427,11723,985(12,590) 704,083Provision/(release) for credit losses25,9876,0851,9583,007(37) 579,380348,871— 965,251Total expenses442,67446,38019,29227,92666,432 458,17314,662(13,198) 1,062,341(Loss)/income before income taxes(61,059)27,30056,58448,570(58,874) 573,167(183,084)666 403,270            Intersegment revenue/(expense)(1)290782740(1,320)(492) ——— —Total assets22,265,21815,501,10514,145,09812,337,89126,519,627 35,521,099—— 126,290,038(1)Intersegment revenue/(expense) represents charges or credits for funds used or provided by each of the segments and is included in net interest income.(2)Other is not considered a segment and includes earnings from non-strategic assets, the investment portfolio, interest expense on the Bank’s and the Parent Company's borrowings and other debt obligations, amortization of intangible assets and certain unallocated corporate income and indirect expenses.(3)Management of SHUSA manages SC by analyzing the pre-Change in Control results of SC as disclosed in this column.(4)Purchase Price Adjustments represents the impact that SC purchase marks had on the results of SC included within the consolidated operations of SHUSA, while eliminations eliminate intercompany transactions.NOTE 17. BUSINESS SEGMENT INFORMATION (continued)            For the Six-Month Period EndedSHUSA Reportable Segments    June 30, 2015Consumer and Business BankingCommercial BankingCommercial Real Estate Global Corporate BankingOther(2) SC(3)SC Purchase Price Adjustments(4)Eliminations(4) Total (in thousands)Net interest income$412,944$132,388$134,823$103,175$2,403 $2,293,561$270,397$145 $3,349,836Total non-interest income355,64123,27316,16641,39044,544 754,59683,289(28,313) 1,290,586Provision for/(release of) credit losses26,6857,69912,7965,75931,061 1,211,227723,663— 2,018,890Total expenses863,66590,97336,96552,900109,984 898,49528,403(26,873) 2,054,512(Loss)/income before income taxes(121,765)56,989101,22885,906(94,098) 938,435(398,380)(1,295) 567,020            Intersegment revenue/(expense)(1)6531,7581,099(3,645)135 ——— —Total assets22,265,21815,501,10514,145,09812,337,89126,519,627 35,521,099—— 126,290,038(1)Intersegment revenue/(expense) represents charges or credits for funds used or provided by each of the segments and is included in net interest income.(2)Other is not considered a segment and includes earnings from non-strategic assets, the investment portfolio, interest expense on the Bank’s and the Parent Company's borrowings and other debt obligations, amortization of intangible assets and certain unallocated corporate income and indirect expenses.(3)Management of SHUSA manages SC by analyzing the pre-Change in Control results of SC as disclosed in this column.(4)Purchase Price Adjustments represent the impact that SC purchase marks had on the results of SC included within the consolidated operations of SHUSA, while eliminations eliminate intercompany transactions. |

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| - Definition
Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.
+ References
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No definition available.
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