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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Face (par) amount of debt instrument at time of issuance.

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

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The cash outflow for the extinguishment of long-term borrowing, with the highest claim on the assets of the entity in case of bankruptcy or liquidation, before its maturity.

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Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer.

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Debt and Credit Facilities (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Line of Credit Facility [Line Items]
Debt Instrument face principal amount	$ 1,400,000,000us-gaap_DebtInstrumentFaceAmount
Long-term debt, gross	3,407,000,000us-gaap_DebtInstrumentCarryingAmount	2,440,000,000us-gaap_DebtInstrumentCarryingAmount
Loss from the extinguishment of long-term debt	37,000,000	0	6,000,000
Long-term maturities during 2015	4,000,000
Long-term maturities during 2016	5,000,000
Long-term maturities during 2017	5,000,000
Long-term maturities during 2018	6,000,000
Long-term maturities during 2019	11,000,000
5.375% Senior Notes Due November 2012
Line of Credit Facility [Line Items]
Debt instrument stated interest rate (percent)			5.375%
Long-term debt, gross			400,000,000
Debt redemption aggregate purchase price			408,000,000
Loss from the extinguishment of long-term debt			6,000,000
3.75% Senior Notes Due 2022
Line of Credit Facility [Line Items]
Debt Instrument face principal amount			750,000,000
Debt instrument stated interest rate (percent)			3.75%
3.5% Senior Notes Due 2023
Line of Credit Facility [Line Items]
Debt Instrument face principal amount		600,000,000
Debt instrument stated interest rate (percent)		3.50%
Net proceeds from issuance of debt		588,000,000
Revolving Credit Facility \| 2014 Motorola Solutions Credit Agreement
Line of Credit Facility [Line Items]
Unsecured syndicated revolving credit facility	2,100,000,000
2011 Motorola Solutions Credit Agreement \| Revolving Credit Facility
Line of Credit Facility [Line Items]
Loss from the extinguishment of long-term debt	(1,500,000,000)
Letter of Credit \| 2014 Motorola Solutions Credit Agreement
Line of Credit Facility [Line Items]
Unsecured syndicated revolving credit facility	450,000,000
6.0% Senior Notes Due 2017
Line of Credit Facility [Line Items]
Debt instrument stated interest rate (percent)	6.00%	6.00%
Aggregate purchase price	456,000,000
Long-term debt, gross	0	399,000,000
Debt redemption aggregate purchase price	400,000,000
Loss from the extinguishment of long-term debt	37,000,000
4.0% Senior Note Due 2024
Line of Credit Facility [Line Items]
Debt Instrument face principal amount	600,000,000
Debt instrument stated interest rate (percent)	4.00%	4.00%
Net proceeds from issuance of debt	583,000,000
Long-term debt, gross	589,000,000	0
3.5% Senior Notes Due 2021
Line of Credit Facility [Line Items]
Debt Instrument face principal amount	400,000,000
Debt instrument stated interest rate (percent)	3.50%	3.50%
Net proceeds from issuance of debt	393,000,000
Long-term debt, gross	395,000,000	0
5.5% Senior Notes Due 2044
Line of Credit Facility [Line Items]
Debt Instrument face principal amount	400,000,000
Debt instrument stated interest rate (percent)	5.50%	5.50%
Net proceeds from issuance of debt	394,000,000
Long-term debt, gross	400,000,000	0
3.5% Senior Notes Due 2023
Line of Credit Facility [Line Items]
Debt instrument stated interest rate (percent)	3.50%	3.50%
Long-term debt, gross	594,000,000	593,000,000
3.75% Senior Notes Due 2022
Line of Credit Facility [Line Items]
Debt instrument stated interest rate (percent)	3.75%	3.75%
Long-term debt, gross	$ 748,000,000	$ 747,000,000