Amount of long-term debt before deduction of unamortized discount or premium. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, with initial maturities beyond one year or the normal operating cycle, if longer.

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Contractual interest rate for funds borrowed, under the debt agreement.

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The amount of debt discount (net of debt premium) that was originally recognized at the issuance of the instrument that has yet to be amortized.

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Amount of long-term debt, after unamortized discount or premium, scheduled to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Debt and lines of credit - Schedule of long-term debt outstanding (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Mar. 31, 2014	May 31, 2013	Aug. 31, 2012
Debt Instrument [Line Items]
Long-term debt, gross	$ 4,625us-gaap_DebtInstrumentCarryingAmount	$ 5,125us-gaap_DebtInstrumentCarryingAmount
Net unamortized premium	17	33
Current portion of long-term debt	(1,001)us-gaap_LongTermDebtCurrent	(1,000)us-gaap_LongTermDebtCurrent
Long-term debt	3,641us-gaap_LongTermDebtNoncurrent	4,158us-gaap_LongTermDebtNoncurrent
Notes payable
Debt Instrument [Line Items]
Long-term debt, gross			500	1,000	1,500
Notes payable \| Notes due 2014 at 1.375%
Debt Instrument [Line Items]
Long-term debt, gross	0	1,000
Long-term debt stated interest rate ( in percents)	1.375%	1.375%
Notes payable \| Notes due 2015 at 0.45%
Debt Instrument [Line Items]
Long-term debt, gross	750	750			750
Long-term debt stated interest rate ( in percents)	0.45%	0.45%
Notes payable \| Notes due 2016 at 2.375%
Debt Instrument [Line Items]
Long-term debt, gross	1,000	1,000
Long-term debt stated interest rate ( in percents)	2.375%	2.375%
Notes payable \| Notes due 2017 at 0.875%
Debt Instrument [Line Items]
Long-term debt, gross	250	0	250
Long-term debt stated interest rate ( in percents)	0.875%	0.875%
Notes payable \| Notes due 2018 at 1.00%
Debt Instrument [Line Items]
Long-term debt, gross	500	500		500
Long-term debt stated interest rate ( in percents)	1.00%	1.00%
Notes payable \| Notes due 2019 at 1.65%
Debt Instrument [Line Items]
Long-term debt, gross	750	750			750
Long-term debt stated interest rate ( in percents)	1.65%	1.65%
Notes payable \| Notes due 2021 at 2.75%
Debt Instrument [Line Items]
Long-term debt, gross	250	0	250
Long-term debt stated interest rate ( in percents)	2.75%	2.75%
Notes payable \| Notes due 2023 at 2.25%
Debt Instrument [Line Items]
Long-term debt, gross	500	500		500
Long-term debt stated interest rate ( in percents)	2.25%	2.25%
National Semiconductor \| Notes payable \| Notes due 2015 at 3.95% (assumed with National acquisition)
Debt Instrument [Line Items]
Long-term debt, gross	250	250
Long-term debt stated interest rate ( in percents)	3.95%	3.95%
National Semiconductor \| Notes payable \| Notes due 2017 at 6.60% (assumed with National acquisition)
Debt Instrument [Line Items]
Long-term debt, gross	$ 375	$ 375
Long-term debt stated interest rate ( in percents)	6.60%	6.60%