|**Goodwill and Other Intangibles (Tables)**              | 3 Months Ended                                                                                                                                                                                                                                                                                                                                                                                         
|-------------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
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|**Goodwill and Intangible Assets Disclosure [Abstract]** |                                                                                                                                                                                                                                                                                                                                                                                                        
|Components of goodwill and other intangibles             | The components of goodwill and other intangibles are as follows:($ in thousands)March 31, 2012December 31, 2011Goodwill:$6,337,719$6,337,719Other Intangibles:Customer base$2,697,763$2,697,413Software licenses105,019105,019Trade name and license135,285135,285Other intangibles2,938,0672,937,717Less: Accumulated amortization(1,120,166)(973,212)Total other intangibles, net$1,817,901$1,964,505
|($ in thousands)                                         |                                                                                                                                                                                                                                                                                                                                                                                                        
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|Goodwill:                                                |                                                                                                                                                                                                                                                                                                                                                                                                        
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|Other Intangibles:                                       |                                                                                                                                                                                                                                                                                                                                                                                                        
|Customer base                                            |                                                                                                                                                                                                                                                                                                                                                                                                        
|Software licenses                                        |                                                                                                                                                                                                                                                                                                                                                                                                        
|Trade name and license                                   |                                                                                                                                                                                                                                                                                                                                                                                                        
|Other intangibles                                        |                                                                                                                                                                                                                                                                                                                                                                                                        
|Less: Accumulated amortization                           |                                                                                                                                                                                                                                                                                                                                                                                                        
|Total other intangibles, net                             |                                                                                                                                                                                                                                                                                                                                                                                                        
|                                                         |                                                                                                                                                                                                                                                                                                                                                                                                        

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