Debt and Borrowing Arrangements (Details 2) (USD $) In Millions	Jun. 30, 2011
Long Term Debt By Maturity [Abstract]
Within one year	$ 2,625
Between one and two years	1,289
Between two and three years	717
Between three and four years	681
Between four and five years	434
Thereafter	8
Total	5,754
Vehicle Management Asset-Backed Debt [Member]
Long Term Debt By Maturity [Abstract]
Within one year	939
Between one and two years	862
Between two and three years	712
Between three and four years	426
Between four and five years	81
Thereafter	0
Total	3,020
Mortgage Asset-Backed Debt [Member]
Long Term Debt By Maturity [Abstract]
Within one year	1,428
Between one and two years	0
Between two and three years	0
Between three and four years	0
Between four and five years	0
Thereafter	0
Total	1,428
Unsecured Debt [Member]
Long Term Debt By Maturity [Abstract]
Within one year	250
Between one and two years	420
Between two and three years	0
Between three and four years	250
Between four and five years	350
Thereafter	8
Total	1,278
Mortgage loan securitization debt certificates [Member]
Long Term Debt By Maturity [Abstract]
Within one year	8
Between one and two years	7
Between two and three years	5
Between three and four years	5
Between four and five years	3
Thereafter	0
Total	$ 28

Including current and noncurrent portions, aggregate carrying amount of long-term borrowings as of the balance sheet date before deducting unamortized discount or premiums (if any). May include notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, which had initial maturities beyond one year or beyond the normal operating cycle, if longer.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Staff Position (FSP)
-Number APB14-1
-Paragraph 31
-Subparagraph b
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 20
-Article 5

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 22
-Article 5

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 03
-Paragraph 16
-Article 9

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 47
-Paragraph 10
-Subparagraph b
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601

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