Condensed Consolidated Statement of Cash Flows (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Cash flows from operating activities:
Net income	$ 1,317	$ 1,262
Adjustments:
Provision for transaction and loan losses	368	265
Depreciation and amortization	676	571
Stock-based compensation	272	238
Gain on divested business	0	(118)
Changes in assets and liabilities, net of acquisition effects	(685)	(919)
Net cash provided by operating activities	1,948	1,299
Cash flows from investing activities:
Purchases of property and equipment	(652)	(599)
Changes in principal loans receivable, net	(183)	(155)
Purchases of investments	(2,024)	(1,344)
Maturities and sales of investments	1,798	629
Acquisitions, net of cash acquired	(15)	(133)
Proceeds from divested business, net of cash disposed	0	144
Other	(14)	(16)
Net cash used in investing activities	(1,090)	(1,474)
Cash flows from financing activities:
Proceeds from issuance of common stock	244	225
Repurchases of common stock	(942)	(595)
Excess tax benefits from stock-based compensation	161	68
Tax witholdings related to net share settlements of restricted stock awards and units	(226)	(132)
Funds receivable and customer accounts	(918)	(328)
Funds payable and amounts due to customers	918	328
Net cash provided by (used in) financing activities	(763)	(434)
Effect of exchange rate changes on cash and cash equivalents	(57)	(44)
Net increase (decrease) in cash and cash equivalents	38	(653)
Cash and cash equivalents at beginning of period	6,817	4,691
Cash and cash equivalents at end of period	6,855	4,038
Supplemental cash flow disclosures:
Cash paid for interest	49	15
Cash paid for income taxes	$ 250	$ 639