Consolidated Statement of Cash Flows (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Operating Activities
Net income	$ 2,758	$ 1,904	$ 1,847
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	230	194	148
Share based payments	89	80	63
Stock units withheld for taxes	(42)	(33)	(126)
Tax benefit for share based compensation	(47)	(12)	(85)
Deferred income taxes	241	(175)	248
Other	53	19	41
Changes in operating assets and liabilities:
Accounts receivable	(121)	(162)	(115)
Income taxes receivable	(185)	0	(50)
Settlement due from customers	(500)	(114)	(61)
Prepaid expenses	(81)	27	(48)
Obligations under litigation settlements	0	(303)	(603)
Accrued litigation	(44)	770	0
Accounts payable	(2)	67	(19)
Settlement due to customers	348	74	186
Accrued expenses	221	296	265
Net change in other assets and liabilities	30	52	6
Net cash provided by operating activities	2,948	2,684	1,697
Investing Activities
Increase in restricted cash for litigation settlement	(726)	0	0
Acquisition of businesses, net of cash acquired	(70)	(460)	(498)
Purchases of property, plant and equipment	(96)	(77)	(61)
Capitalized software	(122)	(100)	(90)
Purchases of investment securities available-for-sale	(2,981)	(899)	(329)
Proceeds from sales of investment securities available-for-sale	390	485	297
Proceeds from maturities of investment securities available-for-sale	891	63	110
Proceeds from maturities of investment securities held-to-maturity	0	300	0
Investment in nonmarketable equity investments	(118)	(74)	(67)
Other investing activities	(7)	14	(3)
Net cash used in investing activities	(2,839)	(748)	(641)
Financing Activities
Purchases of treasury stock	(1,748)	(1,148)	0
Dividends paid	(132)	(77)	(79)
Payment of debt	0	(21)	0
Tax benefit for share based compensation	47	12	85
Cash proceeds from exercise of stock options	31	19	11
Other financing activities	4	0	2
Net cash (used in) provided by financing activities	(1,798)	(1,215)	19
Effect of exchange rate changes on cash and cash equivalents	7	(54)	(63)
Net (decrease) increase in cash and cash equivalents	(1,682)	667	1,012
Cash and cash equivalents - beginning of period	3,734	3,067	2,055
Cash and cash equivalents - end of period	$ 2,052	$ 3,734	$ 3,067