Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Summary of Fair Value and Carrying Value of Financial Assets and Liabilities (Details

v3.8.0.1
Fair Value Measurements - Summary of Fair Value and Carrying Value of Financial Assets and Liabilities (Details - USD ($)
$ in Millions
Mar. 31, 2018
Dec. 31, 2017
Fair Value [Member] | Level 3 [Member] | Credit Facility [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Liabilities $ 70 $ 70
Fair Value [Member] | Level 3 [Member] | Non-recourse Debt [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Liabilities 1,225 1,239
Fair Value [Member] | Level 3 [Member] | Government Receivables [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets 497 519
Fair Value [Member] | Level 3 [Member] | Commercial Receivables [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets 452 464
Fair Value [Member] | Level 3 [Member] | Receivables Held-for-Sale [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets 16 20
Fair Value [Member] | Level 3 [Member] | Investments [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets 152 151
Fair Value [Member] | Level 3 [Member] | Securitization Residual Assets [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets 53 45
Fair Value [Member] | Level 2 [Member] | Convertible Notes [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Liabilities 144 156
Fair Value [Member] | Level 2 [Member] | Derivative Assets [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets 6  
Reported Value Measurement [Member] | Level 3 [Member] | Credit Facility [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Liabilities 70 70
Reported Value Measurement [Member] | Level 3 [Member] | Non-recourse Debt [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Liabilities 1,241 1,238
Reported Value Measurement [Member] | Level 3 [Member] | Government Receivables [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets 514 519
Reported Value Measurement [Member] | Level 3 [Member] | Commercial Receivables [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets 471 473
Reported Value Measurement [Member] | Level 3 [Member] | Receivables Held-for-Sale [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets 16 19
Reported Value Measurement [Member] | Level 3 [Member] | Investments [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets 152 151
Reported Value Measurement [Member] | Level 3 [Member] | Securitization Residual Assets [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets 53 45
Reported Value Measurement [Member] | Level 2 [Member] | Convertible Notes [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Liabilities 151 $ 152
Reported Value Measurement [Member] | Level 2 [Member] | Derivative Assets [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets $ 6