Discontinued Operations - Financial Results of Discontinued Operations (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Operating expenses:
Income from discontinued operations, net of income taxes	$ 0	$ 177
Discontinued Operations
Financial Results
Net revenues	0	2,387
Cost of net revenues	0	1,039
Gross profit	0	1,348
Operating expenses:
Sales and marketing	0	275
Product development	0	264
General and administrative	(2)	363
Provision for transaction and loan losses	0	195
Amortization of acquired intangible assets	0	48
Total operating expenses	(2)	1,145
Income from operations of discontinued operations	2	203
Interest and other, net	0	(2)
Income from discontinued operations before income taxes	2	201
Provision for income taxes	(2)	(24)
Income from discontinued operations, net of income taxes	$ 0	$ 177