Borrowings and Credit Arrangements (Details) ¥ in Millions, $ in Millions		3 Months Ended		6 Months Ended		12 Months Ended
	Apr. 10, 2015 USD ($)	Jun. 30, 2015 USD ($)	Jun. 30, 2014 USD ($)	Jun. 30, 2015 USD ($)	Jun. 30, 2014 USD ($)	Dec. 31, 2014 USD ($)	Jun. 30, 2015 JPY (¥)	Aug. 06, 2013 USD ($)	Apr. 18, 2012 USD ($)
Debt Instrument [Line Items]
Asset Impairment Charges			$ 55
Schedule of debt maturities
Long-term Debt, Maturities, Repayments of Principal in Current Year		$ 0		$ 0
Long-term Debt, Maturities, Repayments of Principal in Year Two		80		80
Long-term Debt, Maturities, Repayments of Principal in Year Three		330		330
Long-term Debt, Maturities, Repayments of Principal in Year Four		840		840
Long-term Debt, Maturities, Repayments of Principal in Year Five		0		0
Long-term Debt, Maturities, Repayments of Principal After Year Five		3,800		3,800
Long-term Debt, Maturities, Total Repayments of Principal		5,050		5,050
Borrowings and Credit Arrangements (Textuals) [Abstract]
Total debt		5,112		5,112		$ 4,262
Line of Credit Facility, Maximum Borrowing Capacity		300		300
Proceeds from long-term borrowings, net of debt issuance costs				1,831	$ 0
Maximum amount of proceeds from sale of finance receivables		$ 389		389
Average interest rate of de-recognized receivables		3.20%				3.20%
De-recognized receivables		$ 177		177		$ 167
Letters of Credit Outstanding, Amount		58		58		59
Debt to be excluded from EBITDA, AMS		$ 1,000		$ 1,000
November 2015 Notes [Member]
Schedule of debt maturities
Debt Instrument, Interest Rate, Stated Percentage		5.50%		5.50%			5.50%
Borrowings and Credit Arrangements (Textuals) [Abstract]
Senior notes		$ 400		$ 400
June 2016 Notes [Member]
Schedule of debt maturities
Debt Instrument, Interest Rate, Stated Percentage		6.40%		6.40%			6.40%
Borrowings and Credit Arrangements (Textuals) [Abstract]
Senior notes		$ 600		$ 600
2025 Notes [Member]
Schedule of debt maturities
Debt Instrument, Interest Rate, Stated Percentage		3.85%		3.85%			3.85%
2022 Notes [Member]
Schedule of debt maturities
Debt Instrument, Interest Rate, Stated Percentage		3.375%		3.375%			3.375%
2020 Notes [Member]
Schedule of debt maturities
Debt Instrument, Interest Rate, Stated Percentage		2.85%		2.85%			2.85%
Uncommitted Credit Facilities With A Commercial Japanese Banks [Member]
Borrowings and Credit Arrangements (Textuals) [Abstract]
Maximum amount of proceeds from sale of finance receivables		$ 172		$ 172			¥ 21,000
De-recognized receivables		$ 128		$ 128		$ 134
Average discounted rates of notes receivables		1.70%		1.70%		1.80%	1.70%
Extinguished Debt [Member]
Schedule of debt maturities
Interest Expense, Debt				$ 45
Italy, Spain, Portugal and Greece [Member]
Borrowings and Credit Arrangements (Textuals) [Abstract]
Accounts receivable 180 days past due		$ 25		25
Accounts receivable 365 days past due		$ 12		$ 12
Covenant Requirement [Member]
Summary of compliance with debt covenants
Maximum Leverage Ratio		3.5		3.5			3.5
Minimum interest coverage ratio		3.0		3.0			3.0
Actual, Covenant [Member]
Summary of compliance with debt covenants
Maximum Leverage Ratio		2.3		2.3			2.3
Minimum interest coverage ratio		6.6		6.6			6.6
2015 Interim Facility [Member]
Borrowings and Credit Arrangements (Textuals) [Abstract]
Line of Credit Facility, Maximum Borrowing Capacity	$ 250
Interest Margin above LIBOR, Minimum	0.90%
Interest Margin above LIBOR, Maximum	1.525%
Commitment fee percentage	0.175%
2015 Term Loan [Member]
Borrowings and Credit Arrangements (Textuals) [Abstract]
Interest Margin above LIBOR, Minimum	1.00%
Interest Margin above LIBOR, Maximum	1.75%
Commitment fee percentage	0.20%
Unsecured Term Loan Facility, Interest Rate During Period		1.50%		1.50%			1.50%
Quarterly term-loan principal payments	$ 38
Revolving credit facility [Member]
Borrowings and Credit Arrangements (Textuals) [Abstract]
Line of Credit Facility, Maximum Borrowing Capacity									$ 2,000
Unsecured Term Loan Facility [Member]
Borrowings and Credit Arrangements (Textuals) [Abstract]
Interest Margin above LIBOR, Minimum								1.00%
Interest Margin above LIBOR, Maximum								1.75%
Unsecured Term Loan Facility, Interest Rate During Period		1.50%		1.50%			1.50%
Quarterly term-loan principal payments								$ 20
the 2015 Facility [Member]
Borrowings and Credit Arrangements (Textuals) [Abstract]
Line of Credit Facility, Maximum Borrowing Capacity	$ 2,000
Interest Margin above LIBOR, Minimum	0.90%
Interest Margin above LIBOR, Maximum	1.50%
Line of Credit Facility, Current Interest Rate		1.30%
Commitment fee percentage		0.20%
Exclusion from EBITDA for Restructuring Charges	$ 620
Restructuring charges remaining to be excluded from calculation of consolidated EBITDA		$ 605		$ 605
Litigation and Debt Exclusion from EBITDA	2,000
Legal payments and debt remaining to be excluded from calculation of consolidated EBITDA		1,668		1,668
2015 Term Loan [Member]
Schedule of debt maturities
Long-term Debt, Maturities, Total Repayments of Principal	$ 750
Senior Notes [Member]
Schedule of debt maturities
Long-term Debt, Maturities, Repayments of Principal in Current Year		0		0
Long-term Debt, Maturities, Repayments of Principal in Year Two		0		0
Long-term Debt, Maturities, Repayments of Principal in Year Three		250		250
Long-term Debt, Maturities, Repayments of Principal in Year Four		600		600
Long-term Debt, Maturities, Repayments of Principal in Year Five		0		0
Long-term Debt, Maturities, Repayments of Principal After Year Five		3,800		3,800
Long-term Debt, Maturities, Total Repayments of Principal		4,650		4,650		$ 3,800
Unsecured Term Loan Facility [Member]
Schedule of debt maturities
Long-term Debt, Maturities, Repayments of Principal in Current Year		0		0
Long-term Debt, Maturities, Repayments of Principal in Year Two		80		80
Long-term Debt, Maturities, Repayments of Principal in Year Three		80		80
Long-term Debt, Maturities, Repayments of Principal in Year Four		240		240
Long-term Debt, Maturities, Repayments of Principal in Year Five		0		0
Long-term Debt, Maturities, Repayments of Principal After Year Five		0		0
Long-term Debt, Maturities, Total Repayments of Principal		400		400		$ 400
Offering Completed in May 2015 [Member]
Schedule of debt maturities
Long-term Debt, Maturities, Total Repayments of Principal		1,850		1,850
2020 Notes [Member]
Schedule of debt maturities
Long-term Debt, Maturities, Total Repayments of Principal		600		600
2022 Notes [Member]
Schedule of debt maturities
Long-term Debt, Maturities, Total Repayments of Principal		500		500
2025 Notes [Member]
Schedule of debt maturities
Long-term Debt, Maturities, Total Repayments of Principal		$ 750		$ 750
Periods prior to the closing of the AMS Portfolio Acquisition [Member] | Covenant Requirement [Member]
Summary of compliance with debt covenants
Maximum Leverage Ratio		4.5		4.5			4.5
Fifth fiscal quarter-end following the closing of the AMS Portfolio Acquisition [Member] | Covenant Requirement [Member]
Summary of compliance with debt covenants
Maximum Leverage Ratio		4.25		4.25			4.25
Sixth fiscal quarter-end following the closing of the AMS Portfolio Acquisition [Member] | Covenant Requirement [Member]
Summary of compliance with debt covenants
Maximum Leverage Ratio		4.0		4.0			4.0
Seventh fiscal quarter-end following the closing of the AMS Portfolio Acquisition [Member] | Covenant Requirement [Member]
Summary of compliance with debt covenants
Maximum Leverage Ratio		3.75		3.75			3.75
Eighth fiscal quarter-end and thereafter following the closing of the AMS Portfolio Acquisition [Member] | Covenant Requirement [Member]
Summary of compliance with debt covenants
Maximum Leverage Ratio		3.5		3.5			3.5