Ultimate vesting percentages based on continued performance targets.

No definition available.

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- Definition

Net number of stock rights granted to participants resulting from the spinoff.

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No definition available.

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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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- Definition

Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

+ References

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- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

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- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

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- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(2)(i)-(ii)

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-Name Statement of Financial Accounting Standard (FAS)

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Weighted average remaining contractual term for equity-based awards excluding options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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- Definition

The net total number of shares (or other type of equity) under an equity-based award plan, other than a stock option plan, that were granted, vested and forfeited during the reporting period.

+ References

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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

+ References

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The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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Change in the weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan).

+ References

No definition available.

+ Details

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- Definition

Net number of non-option equity instruments granted to participants.

+ References

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The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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-Paragraph A240

-Subparagraph a

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-Name Accounting Standards Codification

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-Paragraph 2

-Subparagraph (a)(3)

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Stock Compensation Plans - Share-based Compensation Awards (Details) (USD $)	12 Months Ended	3 Months Ended	12 Months Ended		0 Months Ended			3 Months Ended					12 Months Ended		0 Months Ended			3 Months Ended
	Dec. 31, 2012	Mar. 31, 2011 Stock Awards	Dec. 31, 2012 Stock Awards	Dec. 31, 2011 Stock Awards	Mar. 31, 2011 Restricted performance stock rights	Dec. 31, 2012 Restricted performance stock rights Minimum	Dec. 31, 2012 Restricted performance stock rights Maximum	Dec. 31, 2012 Stock Rights	Dec. 31, 2011 Stock Rights	Sep. 30, 2011 Stock Rights	Jun. 30, 2011 Stock Rights	Mar. 31, 2011 Stock Rights	Dec. 31, 2012 HII Plan Stock Options	Dec. 31, 2012 2012 Long Term Incentive Stock Plan	Aug. 27, 2012 2012 Long Term Incentive Stock Plan Restricted performance stock rights	Feb. 27, 2012 2011 Long Term Incentive Stock Plan Restricted performance stock rights	Mar. 31, 2011 2011 Long Term Incentive Stock Plan Restricted performance stock rights	Mar. 31, 2011 2011 Long Term Incentive Stock Plan Restricted stock rights
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years												3 years		2 years 4 months	2 years 10 months	2 years 9 months	3 years
Common stock authorized for issuance under the 2012 Plan														3,400,000
Shares Available for Grant														3,600,000
Restricted Performance Stock Rights
Stock awards, granted					1,200,000										0	600,000	500,000	700,000
Share price of rights granted		$ 31.89	$ 39.92	$ 39.69											$ 40.03	$ 35.92	$ 41.5	$ 41.5
Restricted performance stock rights ultimate vesting percentage						0.00%	200.00%
Stock awards, granted			581,000	1,213,000				10,000	10,000	10,000	10,000
Stock rights granted, in conenction with spinoff												36,000
Stock Awards (in thousands)
Balance			2,090,000
Stock awards, granted			581,000	1,213,000				10,000	10,000	10,000	10,000
Adjusted due to performance			164,000	483,000
Vested			(881,000)	(827,000)
Forfeited			(53,000)	(16,000)
Balance		1,237,000	1,901,000	2,090,000
Weighted-Average Grant Date Fair Value
Balance			$ 39.69
Granted			$ 36.04	$ 41.38
Adjustment due to performance			$ 37.25	$ 35.91
Vested			$ 37.27	$ 27.23
Forfeited			$ 40.01	$ 39.67
Balance		$ 31.89	$ 39.92	$ 39.69											$ 40.03	$ 35.92	$ 41.5	$ 41.5
Weighted Average Remaining Contractual Term
Balance		1 year 3 months	1 year 5 months	1 year 9 months
Balance		1 year 3 months	1 year 5 months	1 year 9 months