Finance Receivables, Net (Contractual Maturities on Retail Receivables and Dealer Financing) (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2015
Retail receivables [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
2016	$ 14,461
2017	13,043
2018	10,726
2019	7,426
2020	3,883
Thereafter	1,278
Total	50,817
Dealer financing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
2016	11,224
2017	1,718
2018	954
2019	806
2020	524
Thereafter	518
Total	$ 15,744

Notes receivables excluding estimated unguaranteed residual values in direct financing lease.

No definition available.

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Receivables to customers expected to be collected in or after five years from the balance sheet date.

No definition available.

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Receivables to customers expected to be collected in less than five years but greater than four years from the balance sheet date.

No definition available.

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Receivables to customers expected to be collected in less than four years but greater than three years from the balance sheet date.

No definition available.

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Receivables to customers expected to be collected within one year from the balance sheet date.

No definition available.

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Receivables to customers expected to be collected in less than three years but greater than two years from the balance sheet date.

No definition available.

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Receivables to customers expected to be collected in less than two years but greater than one year from the balance sheet date.

No definition available.

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