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Income Taxes (Narrative) (Details) (USD $)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Income Tax Disclosures [Line Items]        
Increase (decrease) in valuation allowance $ 195,000,000 $ 2,000,000    
Valuation allowance 1,090,000,000 895,000,000    
Tax benefits related to tax status of operations in countries subject to reduced tax rates 70,000,000 81,000,000 60,000,000  
Tax benefits related to tax status of operations in countries subject to reduced tax rates per share (in dollars per share) $ 0.09 $ 0.10 $ 0.07  
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued:        
Interest on income taxes accrued 12,000,000 17,000,000    
Income tax penalties accrued 1,000,000 4,000,000    
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense:        
Interest on income taxes expense (4,000,000) 3,000,000 3,000,000  
Income tax penalties expense (3,000,000) 1,000,000 0  
Uncertain Tax Positions Additional Disclosures:        
Unrecognized tax benefits 392,000,000 475,000,000 464,000,000 430,000,000
Unrecognized tax benefits that would impact effective tax rate 360,000,000 444,000,000 418,000,000  
Unrecognized tax benefits that would impact effective tax rate portion with attributes warranting full valuation allowance 26,000,000 45,000,000 47,000,000  
Unrecognized tax benefits anticipated to result in net decrease of unrecognized tax benefits within 12 months, minimum 6,000,000      
Unrecognized tax benefits anticipated to result in net decrease of unrecognized tax benefits within 12 months, maximum 10,000,000      
Federal
        
Income Tax Disclosures [Line Items]        
Operating loss carryforwards 2,800,000,000      
Operating loss carryforwards amount related to stock option deductions to be recognized in APIC 77,000,000      
State and Local Jurisdiction
        
Income Tax Disclosures [Line Items]        
Operating loss carryforwards 7,100,000,000      
Foreign Tax Authority
        
Income Tax Disclosures [Line Items]        
Operating loss carryforwards 3,900,000,000      
Philippines
        
Income Tax Disclosures [Line Items]        
Tax benefits related to tax status of operations in countries subject to reduced tax rates 41,000,000 60,000,000 34,000,000  
Tax benefits related to tax status of operations in countries subject to reduced tax rates per share (in dollars per share) $ 0.05 $ 0.07 $ 0.04  
General Business Tax Credit Carryforward [Member]
        
Income Tax Disclosures [Line Items]        
Tax credit carryforward 18,000,000      
Federal Alternative Minimum Tax [Member]
        
Income Tax Disclosures [Line Items]        
Tax credit carryforward 5,000,000      
Foreign Jurisdictions [Member]
        
Income Tax Disclosures [Line Items]        
Tax credit carryforward 15,000,000      
Year 2013 to 2015 [Member] | Foreign Jurisdictions [Member]
        
Income Tax Disclosures [Line Items]        
Tax credit carryforward 1,000,000      
No Expiration [Member]
        
Income Tax Disclosures [Line Items]        
Tax credit carryforward $ 14,000,000