Financing Receivables (Gross And Net Lease Investment) (Detail) - Energy Holdings [Member] - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Schedule of Financial Receivables [Line Items]
Lease Receivables (net of Non-Recourse Debt)	$ 661	$ 691
Estimated Residual Value of Leased Assets	519	525
Unearned and Deferred Income	(372)	(380)
Gross Investment in Leases	808	836
Deferred Tax Liabilities	(695)	(738)
Net Investment in Leases	$ 113	$ 98