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Nonrecourse Debt - Schedule of Minimum Maturities of Nonrecourse Debt (Detail)

v3.2.0.727
Nonrecourse Debt - Schedule of Minimum Maturities of Nonrecourse Debt (Detail)
$ in Millions
Jun. 30, 2015
USD ($)
Debt Instrument [Line Items]  
Maturity of Nonrecourse debt, 2016 $ 39
Maturity of Nonrecourse debt, 2017 36
Maturity of Nonrecourse debt, 2018 31
Maturity of Nonrecourse debt, 2019 26
Maturity of Nonrecourse debt, 2020 86
Maturity of Nonrecourse debt, Thereafter 88
Maturity of Nonrecourse debt, Total 306
Asset-Backed Nonrecourse Notes [Member]  
Debt Instrument [Line Items]  
Maturity of Nonrecourse debt, 2016 22
Maturity of Nonrecourse debt, 2017 20
Maturity of Nonrecourse debt, 2018 20
Maturity of Nonrecourse debt, 2019 21
Maturity of Nonrecourse debt, 2020 82
Maturity of Nonrecourse debt, Thereafter 33
Maturity of Nonrecourse debt, Total 198
Other Nonrecourse Debt [Member]  
Debt Instrument [Line Items]  
Maturity of Nonrecourse debt, 2016 17
Maturity of Nonrecourse debt, 2017 16
Maturity of Nonrecourse debt, 2018 11
Maturity of Nonrecourse debt, 2019 5
Maturity of Nonrecourse debt, 2020 4
Maturity of Nonrecourse debt, Thereafter 55
Maturity of Nonrecourse debt, Total $ 108