Borrowings and Credit Arrangements (Details)	6 Months Ended		12 Months Ended					0 Months Ended
	Jun. 30, 2012 USD ($)	Jun. 30, 2012 EUR (€)	Dec. 31, 2011 USD ($)	Jun. 30, 2012 Covenant Requirement [Member]	Jun. 30, 2012 Actual, Covenant [Member]	Jun. 30, 2012 Credit Facility Two [Member] USD ($)	Dec. 31, 2011 Credit Facility Two [Member] USD ($)	May 03, 2012 Revolving credit facility [Member]	Jun. 30, 2012 Revolving credit facility [Member] USD ($)	Apr. 18, 2012 Revolving credit facility [Member] USD ($)	Jun. 30, 2012 Uncommitted Credit Facilities With A Commercial Japanese Banks [Member] USD ($)	Jun. 30, 2012 Uncommitted Credit Facilities With A Commercial Japanese Banks [Member] JPY (¥)	Dec. 31, 2011 Uncommitted Credit Facilities With A Commercial Japanese Banks [Member] USD ($)	Jun. 30, 2012 Senior Notes [Member] USD ($)
Schedule of debt maturities
Payments due, 2012
Payments due, 2013
Payments due, 2014	600,000,000													600,000,000
Payments due, 2015	1,250,000,000													1,250,000,000
Payments due, 2016	600,000,000
Payments due, Thereafter	1,750,000,000													1,750,000,000
Payments due, Total	4,200,000,000													4,200,000,000
Summary of compliance with debt covenants
Maximum Leverage Ratio				3.5	2.4
Minimum interest coverage ratio				3.0	6.6
Borrowings and Credit Arrangements (Textuals) [Abstract]
Total debt	4,257,000,000		4,261,000,000
Interest Margin above LIBOR, Minimum										0.875%
Interest Margin above LIBOR, Maximum										1.475%
Line of Credit Facility, Current Interest Rate								1.275%
Commitment fee percentage								0.225%
Line of Credit Facility, Amount Outstanding	0		0			0	0
Restructuring charges remaining to be excluded from calculation of consolidated EBITDA									467,000,000
Legal payments and debt remaining to be excluded from calculation of consolidated EBITDA									2,290,000,000
Senior notes	4,200,000,000		4,200,000,000
Line of Credit Facility, Maximum Borrowing Capacity						350,000,000				2,000,000,000
Maximum amount of proceeds from sale of finance receivables	291,000,000	230,000,000									264,000,000	21,000,000,000
De-recognized receivables	261,000,000		390,000,000								197,000,000		188,000,000
Average interest rate of de-recognized receivables	2.40%	2.40%	3.30%
Average discounted rates of notes receivables											1.60%	1.60%	1.70%
Litigation and Debt Exclusion from EBITDA										2,300,000,000
Exclusion from EBITDA for Restructuring Charges										$ 500,000,000