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The amount of goodwill arising from a business combination that is expected to be deductible for tax purposes.

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Amount of liabilities assumed at the acquisition date.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of a finite-lived intangible asset to fair value.

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The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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Acquisition - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended			3 Months Ended	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012	Jun. 30, 2013 Open Solutions Inc	Jun. 30, 2013 Open Solutions Inc	Jan. 14, 2013 Open Solutions Inc
Business Acquisition [Line Items]
Total cash purchase price							$ 55
Assumption of debt								960
Goodwill	5,231		5,231		4,705			531
Goodwill deductible for tax purposes								161
Revenue	1,198	1,087	2,350	2,184		76	135
Non cash impairment charge associated with merger and integration			$ 30				$ 30