Reportable Operating Segements and Geographic Operations (Details 1) (USD $)
In Millions, unless otherwise specified

3 Months Ended

12 Months Ended

Dec. 31, 2011

Sep. 30, 2011

Jun. 30, 2011

Mar. 31, 2011

Dec. 31, 2010

Sep. 30, 2010

Jun. 30, 2010

Mar. 31, 2010

Dec. 31, 2011

Dec. 31, 2010

Dec. 31, 2009

Segment Revenues And Pretax Income Loss By Geographic Location [Line Items]

Total revenues net of interest expense

$ 7,742

$ 7,571

$ 7,618

$ 7,031

$ 7,244

$ 6,973

$ 6,805

$ 6,560

$ 29,962

$ 27,582

$ 24,336

Pretax income (loss) from continuing operations

1,748

1,711

1,765

1,732

1,477

1,640

1,595

1,252

6,956

5,964

2,841

United States Geographic Region [Member]

Segment Revenues And Pretax Income Loss By Geographic Location [Line Items]

Total revenues net of interest expense

21,254

19,976

17,328

Pretax income (loss) from continuing operations

6,971

6,137

3,194

EMEA Geographic Region [Member]

Segment Revenues And Pretax Income Loss By Geographic Location [Line Items]

Total revenues net of interest expense

3,551

3,132

3,152

Pretax income (loss) from continuing operations

620

444

319

JAPA Geographic Region [Member]

Segment Revenues And Pretax Income Loss By Geographic Location [Line Items]

Total revenues net of interest expense

3,071

2,630

2,229

Pretax income (loss) from continuing operations

430

273

187

LACC Geographic Region [Member]

Segment Revenues And Pretax Income Loss By Geographic Location [Line Items]

Total revenues net of interest expense

2,706

2,451

2,314

Pretax income (loss) from continuing operations

583

469

276

Other Unallocated [Member]

Segment Revenues And Pretax Income Loss By Geographic Location [Line Items]

Total revenues net of interest expense

(620)

(607)

(687)

Pretax income (loss) from continuing operations

$ (1,648)

$ (1,359)

$ (1,135)