Condensed Consolidated Statements of Cash Flows (USD $)	3 Months Ended
Apr. 03, 2015	May 02, 2014
Cash flows from operations:
Net income	$ 41,000,000us-gaap_NetIncomeLoss	$ 37,000,000us-gaap_NetIncomeLoss
(Income) loss from discontinued operations	(18,000,000)	8,000,000
Adjustments to reconcile net income to net cash provided by operations:
Depreciation and amortization	12,000,000	18,000,000
Stock-based compensation	6,000,000us-gaap_ShareBasedCompensation	11,000,000us-gaap_ShareBasedCompensation
Asset impairment charges	40,000,000us-gaap_AssetImpairmentCharges	0us-gaap_AssetImpairmentCharges
Other	(1,000,000)us-gaap_OtherNoncashIncomeExpense	(1,000,000)us-gaap_OtherNoncashIncomeExpense
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Receivables	17,000,000us-gaap_IncreaseDecreaseInReceivables	(48,000,000)us-gaap_IncreaseDecreaseInReceivables
Inventory, prepaid expenses and other current assets	(29,000,000)	(36,000,000)
Deferred income taxes	23,000,000	0
Accounts payable and accrued liabilities	30,000,000	22,000,000
Accrued payroll and employee benefits	(59,000,000)	(32,000,000)
Income taxes receivable/payable	(98,000,000)	14,000,000
Other long-term assets / liabilities	(6,000,000)	(2,000,000)
Total cash flows used in operating activities of continuing operations	(42,000,000)	(9,000,000)
Cash flows from investing activities:
Expenditures for property, plant and equipment	(3,000,000)	(10,000,000)
Other	1,000,000	0
Total cash flows used in investing activities of continuing operations	(2,000,000)	(10,000,000)
Cash flows from financing activities:
Payments of notes payable and long-term debt	(29,000,000)	0
Sales of stock and exercises of stock options	1,000,000	2,000,000
Repurchases of stock and stock received for tax withholdings	(6,000,000)us-gaap_PaymentsForRepurchaseOfEquity	(212,000,000)us-gaap_PaymentsForRepurchaseOfEquity
Dividend payments	(24,000,000)us-gaap_PaymentsOfDividends	(24,000,000)us-gaap_PaymentsOfDividends
Other	1,000,000	1,000,000
Total cash flows used in financing activities of continuing operations	(57,000,000)	(233,000,000)
Decrease in cash and cash equivalents from continuing operations	(101,000,000)	(252,000,000)
Cash flows from discontinued operations:
Cash provided by operating activities of discontinued operations	13,000,000	5,000,000
Cash provided by investing activities of discontinued operations	6,000,000	0
Increase in cash and cash equivalents from discontinued operations	19,000,000	5,000,000
Increase in cash and cash equivalents from discontinued operations	(82,000,000)	(247,000,000)
Cash and Cash Equivalents, at Carrying Value, Including Discontinued Operations	377,000,000	183,000,000
Leidos, Inc.
Cash flows from operations:
Net income	43,000,000	38,000,000
(Income) loss from discontinued operations	(18,000,000)	8,000,000
Adjustments to reconcile net income to net cash provided by operations:
Depreciation and amortization	12,000,000	18,000,000
Stock-based compensation	6,000,000	11,000,000
Asset impairment charges	40,000,000	0
Other	(3,000,000)	(2,000,000)
Change in assets and liabilities, net of effects of acquisitions and dispositions:
Receivables	17,000,000	(48,000,000)
Inventory, prepaid expenses and other current assets	(29,000,000)	(36,000,000)
Deferred income taxes	23,000,000	0
Accounts payable and accrued liabilities	30,000,000	22,000,000
Accrued payroll and employee benefits	(59,000,000)	(32,000,000)
Income taxes receivable/payable	(98,000,000)	14,000,000
Other long-term assets / liabilities	(6,000,000)	(2,000,000)
Total cash flows used in operating activities of continuing operations	(42,000,000)	(9,000,000)
Cash flows from investing activities:
Proceeds on obligations of Leidos Holdings, Inc.	15,000,000	3,000,000
Payments on obligations of Leidos Holdings, Inc.	(43,000,000)	(237,000,000)
Expenditures for property, plant and equipment	(3,000,000)	(10,000,000)
Other	1,000,000	0
Total cash flows used in investing activities of continuing operations	(30,000,000)	(244,000,000)
Cash flows from financing activities:
Payments of notes payable and long-term debt	(29,000,000)	0
Other	0	1,000,000
Total cash flows used in financing activities of continuing operations	(29,000,000)	1,000,000
Decrease in cash and cash equivalents from continuing operations	(101,000,000)	(252,000,000)
Cash flows from discontinued operations:
Cash provided by operating activities of discontinued operations	13,000,000	5,000,000
Cash provided by investing activities of discontinued operations	6,000,000	0
Increase in cash and cash equivalents from discontinued operations	19,000,000	5,000,000
Increase in cash and cash equivalents from discontinued operations	(82,000,000)	(247,000,000)
Cash and Cash Equivalents, at Carrying Value, Including Discontinued Operations	$ 377,000,000	$ 183,000,000

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The cash outflow associated with security instruments that either represent a creditor or an ownership relationship with the holder of the investment security with a maturity of beyond one year or normal operating cycle, if longer. Includes repayments of (a) debt, (b) capital lease obligations, (c) mandatory redeemable capital securities, and (d) any combination of (a), (b), or (c).

+ References

+ Details

Name:	us-gaap_RepaymentsOfLongTermDebtAndCapitalSecurities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

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+ Details

Name:	us-gaap_ShareBasedCompensation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	dei_LegalEntityAxis=us-gaap_SubsidiariesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: