Income Taxes (Narrative) (Details) (USD $)	3 Months Ended	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Contingency [Line Items]
Decrease in deferred tax liability due to out of period income tax benefit	$ 50,000,000	$ 50,000,000
Increase in deferred tax assets due to out of period income tax benefit	21,000,000	21,000,000
Tax data enhancement, amount	71,000,000	71,000,000
Income tax expense (benefit) associated with an indemnification benefit from income tax claim related to acquisition			40,000,000	55,000,000
Income tax expense (benefit) related to net gains (losses) from sales of investment securities		6,000,000	22,000,000	55,000,000
Income (loss) from continuing operations before income taxes, foreign		1,250,000,000	1,110,000,000	1,230,000,000
Investment of retained earnings	3,500,000,000	3,500,000,000
Amount of unrecognized deferred tax liability related to undistributed foreign earnings of subsidiary	690,000,000	690,000,000
Tax Credit Carryforward, Deferred Tax Asset	3,000,000	3,000,000	76,000,000
Tax Credit Carryforward, Expiration Date		Dec. 31, 2033
Deferred tax assets, operating loss carryforwards	50,000,000	50,000,000	45,000,000
Operating loss carryforwards not expiring	33,000,000	33,000,000
Operating loss carryforwards expiring	17,000,000	17,000,000
Tax positions for which the ultimate deductibility is highly certain but time is uncertain		98,000,000
Interest accrued	7,000,000	7,000,000	2,000,000
Possible decrease in unrecognized benefits, upper bound	6,000,000	6,000,000
Interest expense		3,000,000	12,000,000	10,000,000
Potential agreements covering outstanding refund claims
Income Tax Contingency [Line Items]
Possible decrease in unrecognized benefits, lower bound	$ 5,000,000	$ 5,000,000
Maximum
Income Tax Contingency [Line Items]
Operating loss carryforwards expiration dates		Dec. 31, 2031