v2.4.0.6
Segment and Geographic Information (Selected Financial Information by Segments) (Details) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2010
Retail Asset Management
Dec. 31, 2010
DFS
Dec. 31, 2011
Institutional Securities
Dec. 31, 2010
Institutional Securities
Dec. 31, 2012
Institutional Securities
Dec. 31, 2011
Institutional Securities
Dec. 31, 2010
Institutional Securities
Dec. 31, 2012
Global Wealth Management Group
Dec. 31, 2011
Global Wealth Management Group
Dec. 31, 2010
Global Wealth Management Group
Dec. 31, 2012
Asset Management
Dec. 31, 2011
Asset Management
Dec. 31, 2010
Asset Management
Dec. 31, 2010
Discover
Dec. 31, 2012
Intersegment Eliminations
Dec. 31, 2011
Intersegment Eliminations
Dec. 31, 2010
Intersegment Eliminations
Total non-interest revenues $ 6,791 $ 5,435 $ 7,102 $ 6,983 $ 5,405 $ 9,658 $ 9,266 $ 7,551 $ 26,311 $ 31,880 [1] $ 30,332 [1]         $ 12,339 $ 18,255 [1] $ 16,355 [1] $ 11,904 $ 11,812 [1] $ 11,403 [1] $ 2,243 $ 1,928 [1] $ 2,761 [1] $ 0 [1] $ (175) $ (115) [1] $ (187) [1]
Net interest 175 (155) (160) (59) 270 145 (66) 7 (199) 356 898         (1,786) (1,080) (226) 1,612 1,477 1,116 (24) (41) (76) 0 (1) 0 84
Net revenues 6,966 5,280 6,942 6,924 5,675 9,803 9,200 7,558 26,112 32,236 31,230         10,553 17,175 16,129 13,516 13,289 12,519 2,219 1,887 2,685 0 (176) (115) (103)
Income (loss) from continuing operations before income taxes 859 (1,483) 937 202 (456) 3,688 1,971 896 515 6,099 6,198         (1,671) 4,591 4,365 1,600 1,255 1,130 590 253 718 0 (4) 0 (15)
Provision for (benefit from) income taxes 8 [2] (525) [2] 224 [3] 54 (298) 1,415 539 (246) (239) [4] 1,410 743         (1,065) [4] 879 313 559 [4] 458 328 267 [4] 73 105 0 0 [4] 0 (3)
Income (loss) from continuing operations 851 (958) 713 148 (158) 2,273 1,432 1,142 754 4,689 5,455         (606) 3,712 4,052 1,041 797 802 323 180 613 0 (4) 0 (12)
Discontinued operations:                                                        
Gain (loss) from discontinued operations (112) [5] (11) [5] 52 [5] 28 [5] (106) [5] (8) [5],[6] (22) [5] (24) [5] (43) [6],[7] (160) [6],[7] 610 [6],[7]         (154) [6] (205) [6] (1,203) [6] 94 [6] 21 [6] 26 [6] 13 [6] 24 [6] 999 [6] 775 [6] 4 [6] 0 [6] 13 [6]
Provision for (benefit from) income taxes (49) [5] (13) [5] 15 [5] 42 [5] (80) [5] (28) [5],[6] 4 [5] (12) [5] (5) [6] (116) [6] 363 [6]         (35) [6] (106) [6] 13 [6] 26 [6] 7 [6] 8 [6] 4 [6] (17) [6] 335 [6] 0 [6] 0 [6] 0 [6] 7 [6]
Net gain (loss) on discontinued operations (63) [5] 2 [5] 37 [5] (14) [5] (26) [5] 20 [5],[6] (26) [5] (12) [5] (38) [6] (44) [6] 247 [6],[8]         (119) [6] (99) [6] (1,216) [6],[8] 68 [6] 14 [6] 18 [6],[8] 9 [6] 41 [6] 664 [6],[8] 775 [6],[8] 4 [6] 0 [6] 6 [6],[8]
Net income (loss) 788 (956) 750 134 (184) 2,293 1,406 1,130 716 4,645 5,702         (725) 3,613 2,836 1,109 811 820 332 221 1,277 775 0 0 (6)
Net income applicable to redeemable noncontrolling interests 116 8 0 0 0 0 0 0 124 0 0         0     124     0       0    
Net income (loss) applicable to nonredeemable noncontrolling interest 78 59 159 228 66 94 213 162 524 535 999         194 244 290 143 146 301 187 145 408 0 0 0 0
Net income (loss) applicable to Morgan Stanley 594 (1,023) 591 (94) (250) 2,199 1,193 968 68 4,110 4,703         (919) 3,369 2,546 842 665 519 145 76 869 775 0 0 (6)
Segment Reporting Information, Additional Information                                                        
Out of period net tax provision related to overstatement in prior periods' deferred tax assets                                           107            
Out of period net tax provision related to overstatement of tax benefits associated with repatriation of foreign earnings                               50                        
Gain (loss) upon application of OIS curve                           (108) 176                          
Loss in connection with disposition of business                 0 0 1,190                                  
Pre-tax gain (loss) from disposal of discontinued operations                       $ 570 $ 775                              
[1] In the fourth quarter of 2011 and 2010, the Company recognized a pre-tax loss of approximately $108 million and a pre-tax gain of approximately $176 million, respectively, in net revenues upon application of the OIS curve within the Institutional Securities business segment (see Note 4).
[2] The third quarter of 2012 included an out-of-period net tax provision of approximately $82 million primarily related to the overstatement of tax benefits associated with repatriated earnings of a foreign subsidiary in prior periods, while the fourth quarter of 2012 included an out-of-period net tax provision of approximately $75 million primarily related to the overstatement of deferred tax assets associated with partnership investments in prior periods (see Note 22).
[3] The second quarter of 2012 included an out-of-period pre-tax gain of approximately $300 million related to the reversal of amounts recorded in cumulative other comprehensive income due to the incorrect application of hedge accounting on certain derivative contracts previously designated as net investment hedges of certain foreign, non-U.S. dollar denominated subsidiaries. This amount included a pre-tax gain of approximately $191 million related to the first quarter of 2012, with the remainder impacting prior periods (see Note 12)
[4] Results for 2012 included an out-of-period net tax provision of approximately $107 million, attributable to the Asset Management business segment, related to the overstatement of deferred tax assets associated with partnership investments in prior years and an out-of-period net tax provision of approximately $50 million, attributable to the Institutional Securities business segment, related to the overstatement of deferred tax assets associated with repatriated earnings of a foreign subsidiary recorded in prior years (see Note 22).
[5] See Notes 1 and 25 for more information on discontinued operations.
[6] See Notes 1 and 25 for discussion of discontinued operations.
[7] Amounts included eliminations of intersegment activity.
[8] Amounts for 2010 included a loss of $1.2 billion related to the disposition of Revel included within the Institutional Securities business segment, a gain of approximately $570 million related to the Company’s sale of Retail Asset Management within the Asset Management business segment and a gain of $775 million related to the legal settlement with DFS.