Condensed Consolidated Statement Of Cash Flows (Parenthetical) (USD $) In Millions, unless otherwise specified	3 Months Ended
Mar. 31, 2012	Mar. 31, 2011
Cash and cash equivalents of business units at the time of disposition	$ 64	$ 7

Cash and cash equivalents of business units at the time of disposition

No definition available.

Name:	gjm_CashAndCashEquivalentsOfBusinessUnitsAtTimeOfDisposition
Namespace Prefix:	gjm_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration