Guarantor (Statement of Financial Position - Paranthetical) (Details) - USD ($) $ in Millions	Jun. 30, 2016	Dec. 31, 2015
Guarantee Obligations [Line Items]
Cash and equivalents	$ 52,123	$ 70,483

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration