Borrowings and Credit Arrangements (Details)	3 Months Ended	12 Months Ended										20 Months Ended															3 Months Ended
	Sep. 30, 2013 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2012 USD ($)	Jun. 30, 2013 USD ($)	Dec. 31, 2013 Uncommitted Credit Facilities With Two Commercial Japanese Banks [Member] USD ($)	Dec. 31, 2013 Uncommitted Credit Facilities With Two Commercial Japanese Banks [Member] JPY (¥)	Dec. 31, 2012 Uncommitted Credit Facilities With Two Commercial Japanese Banks [Member] USD ($)	Dec. 31, 2013 Senior Notes [Member] USD ($)	Dec. 31, 2013 Unsecured Term Loan Facility [Member] USD ($)	Dec. 31, 2013 Covenant Requirement [Member]	Dec. 31, 2013 Actual, Covenant [Member]	Dec. 31, 2013 Credit Facility One [Member] USD ($)	Apr. 18, 2012 Credit Facility One [Member] USD ($)	Dec. 31, 2013 Unsecured Term Loan Facility [Member] USD ($)	Aug. 06, 2013 Unsecured Term Loan Facility [Member] USD ($)	Dec. 31, 2013 Uncommitted Credit Facilities With Two Commercial Japanese Banks [Member]	Dec. 31, 2013 November 2015 Notes [Member] USD ($)	Dec. 31, 2013 June 2016 Notes [Member] USD ($)	Dec. 31, 2013 January 2017 Notes [Member] USD ($)	Dec. 31, 2013 October 2018 Notes [Member] USD ($)	Dec. 31, 2013 January 2020 Notes [Member] USD ($)	Dec. 31, 2013 October 2023 Notes [Member] USD ($)	Dec. 31, 2013 November 2035 Notes [Member] USD ($)	Dec. 31, 2013 January 2040 Notes [Member] USD ($)	Aug. 13, 2013 $600 million, Senior Note [Member] USD ($)	Aug. 13, 2013 $450 million, Senior Note [Member] USD ($)	Sep. 30, 2013 $600 million, Snr Note [Member] USD ($)	Sep. 30, 2013 $850 million, Senior Note [Member] USD ($)
Debt Instrument [Line Items]
Senior notes issued		$ 2,200,000,000
Repurchase rate of senior notes issued in ’09 and ’13 in event change-in-control		1.01
Long-term Debt, Current Maturities		0						0	0
Letters of Credit Outstanding, Amount		78,000,000	94,000,000
Schedule of debt maturities
Payments due, 2012		400,000,000						400,000,000	0
Payments due, 2013		680,000,000						600,000,000	80,000,000
Payments due, 2014		330,000,000						250,000,000	80,000,000
Payments due, 2015		840,000,000						600,000,000	240,000,000
Payments due, Thereafter		1,950,000,000						1,950,000,000	0
Payments due, Total		4,200,000,000						3,800,000,000	400,000,000
Summary of compliance with debt covenants
Maximum Leverage Ratio										3.5	2.5
Minimum interest coverage ratio										3.0	5.2
Borrowings and Credit Arrangements (Textuals) [Abstract]
Total debt		4,240,000,000	4,256,000,000
Debt Instrument, Interest Rate, Effective Percentage																	6.25%						7.00%
Revolving credit facility		300,000,000		350,000,000									2,000,000,000
Interest Margin above LIBOR, Minimum													0.875%		1.00%
Interest Margin above LIBOR, Maximum													1.475%		1.75%
Current interest rate on revolving credit facility												1.275%
Commitment fee percentage												0.225%
Amount of exclusions from EBITDA related to existing restructuring plans													500,000,000
Restructuring charges remaining to be excluded from calculation of consolidated EBITDA												234,000,000
Amount of exclusions from EBITDA related to future litigation charges and payments													2,300,000,000
Legal payments remaining to be excluded from calculation of consolidated EBITDA												2,185,000,000
Long-term Debt, Gross															400,000,000
Senior notes		3,800,000,000	4,200,000,000														400,000,000	600,000,000	250,000,000	600,000,000	850,000,000	450,000,000	350,000,000	300,000,000	600,000,000	450,000,000
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate																									2.65%	4.125%
Debt Instrument, Interest Rate, Stated Percentage																	5.50%	6.40%	5.125%	2.65%	6.00%	4.125%	6.25%	7.375%
Maximum amount of proceeds from sale of finance receivables		312,000,000			200,000,000	21,000,000,000
De-recognized receivables		146,000,000	191,000,000		147,000,000		182,000,000
Average interest rate of de-recognized receivables		3.30%	1.60%
Average discounted rates of notes receivables							1.60%									1.80%
Unsecured Term Loan Facility, Interest Rate During Period														1.50%
Quarterly term-loan principal payments														20,000,000
Repayments of Debt																											600,000,000	850,000,000
Payments of Debt Extinguishment Costs	70,000,000
Payment of Debt Extinguishment Costs, net of tax	$ 44,000,000