Notes Receivable Reserves (Detail) (USD $) In Millions	Sep. 09, 2011	Dec. 31, 2010
Financing Receivable, Allowance for Credit Losses [Line Items]
Notes Receivable Reserves Balance	$ 263	$ 292
Nonsecuritized Notes Receivable
Financing Receivable, Allowance for Credit Losses [Line Items]
Notes Receivable Reserves Balance	200	203
Securitized Notes Receivable
Financing Receivable, Allowance for Credit Losses [Line Items]
Notes Receivable Reserves Balance	$ 63	$ 89

A valuation allowance for financing receivables that are expected to be uncollectible.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-URI http://asc.fasb.org/extlink&oid=6965416&loc=SL6953423-111524
-Subparagraph (c)(1)

Name:	us-gaap_FinancingReceivableAllowanceForCreditLosses
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant