Borrowings and Credit Arrangements (Details)	12 Months Ended								3 Months Ended
	Dec. 31, 2011 USD ($)	Dec. 31, 2010 USD ($)	Dec. 31, 2009 USD ($)	Dec. 31, 2011 EUR (€)	Dec. 31, 2011 Uncommitted Credit Facilities With Two Commercial Japanese Banks [Member] USD ($)	Dec. 31, 2011 Uncommitted Credit Facilities With Two Commercial Japanese Banks [Member] JPY (¥)	Dec. 31, 2010 Uncommitted Credit Facilities With Two Commercial Japanese Banks [Member] USD ($)	Dec. 31, 2011 Senior Notes [Member] USD ($)	Dec. 31, 2011 Revolving credit facility [Member] USD ($)	Dec. 31, 2010 Revolving credit facility [Member] USD ($)	Dec. 31, 2011 Revolving credit facility [Member] Covenant Requirement [Member]	Dec. 31, 2011 Revolving credit facility [Member] Actual, Covenant [Member]	Dec. 31, 2011 Credit Facility One [Member] USD ($)	Dec. 31, 2010 Credit Facility One [Member] USD ($)	Dec. 31, 2011 June 2014 Notes [Member] USD ($)	Dec. 31, 2011 Uncommitted Credit Facilities With Two Commercial Japanese Banks [Member]	Dec. 31, 2011 January 2015 Notes [Member] USD ($)	Dec. 31, 2011 November 2015 Notes [Member] USD ($)	Dec. 31, 2011 June 2016 Notes [Member] USD ($)	Dec. 31, 2011 January 2017 Notes [Member] USD ($)	Dec. 31, 2011 January 2020 Notes [Member] USD ($)	Dec. 31, 2011 November 2035 Notes [Member] USD ($)	Dec. 31, 2011 January 2040 Notes [Member] USD ($)
Debt Instrument [Line Items]
Letters of Credit Outstanding, Amount	$ 128,000,000	$ 120,000,000
Repayments of Long-term Debt	1,000,000,000
Schedule of debt maturities
Payments due, 2011
Payments due, 2012
Payments due, 2013	600,000,000							600,000,000
Payments due, 2014	1,250,000,000							1,250,000,000
Payments due, 2015	600,000,000							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	1.5
Minimum interest coverage ratio											3.0	9.0
Borrowings and Credit Arrangements (Textuals) [Abstract]
Total debt	4,261,000,000	5,438,000,000
Repayment of term loan facility	1,000,000,000
Payments of senior notes at maturity	250,000,000
Debt Instrument, Interest Rate, Effective Percentage																		6.25%				7.00%
Revolving credit facility	350,000,000								2,000,000,000
Interest Margin above LIBOR, Minimum									1.55%
Interest Margin above LIBOR, Maximum									2.625%
Current interest rate on revolving credit facility									2.05%
Commitment fee percentage									0.45%
Line of Credit Facility, Amount Outstanding									0	0			0	0
Amount of exclusions from EBITDA related to existing restructuring plans									258,000,000
Amount of exclusions from EBITDA related to future restructuring initiatives									300,000,000
Restructuring charges remaining to be excluded from calculation of consolidated EBITDA									341,000,000
Amount of exclusions from EBITDA related to litigation charges recorded as of March 31, 2010									1,310,000,000
Amount of exclusions from EBITDA related to future litigation charges and payments									1,500,000,000
Legal payments remaining to be excluded from calculation of consolidated EBITDA									1,813,000,000
Senior notes	4,200,000,000	4,450,000,000													600,000,000		850,000,000	400,000,000	600,000,000	250,000,000	850,000,000	350,000,000	300,000,000
Debt Instrument, Interest Rate, Stated Percentage															5.45%		4.50%	5.50%	6.40%	5.125%	6.00%	6.25%	7.375%
Maximum amount of proceeds from sale of finance receivables	430,000,000			330,000,000	240,000,000	18,500,000,000
De-recognized receivables	390,000,000	363,000,000			188,000,000		197,000,000
Average interest rate of de-recognized receivables	3.30%	2.00%
Average discounted rates of notes receivables							1.70%									1.70%
Senior notes issued during 2009			$ 2,000,000,000