Achievement of long-term financial goals period.

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- Definition

Conversion ratio for stock options and stock awards.

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- Definition

Disclosure of the aggregate tax benefit realized from the issuance of stock awards.

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No definition available.

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- Definition

Employee service share based compensation unrecognized compensation expense.

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- Definition

ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardForfeituresPercentageObjectivesNotMet.

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- Definition

Share based compensation arrangement by share based payment award award grants percentage financial metric met exceeded.

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No definition available.

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- Definition

Share based compensation arrangement by share based payment award award vesting percentage.

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No definition available.

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- Definition

The period of time a share-based award, for executives, is expected to be outstanding. A share-based award's expected term shall be determined based on, among other factors, the instrument's contractual term and the effects of employees' expected exercise and post-vesting employment termination behavior. An entity is required to aggregate individual awards into relatively homogeneous groups.

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No definition available.

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- Definition

The period of time a share-based award, for non-executives, is expected to be outstanding. A share-based award's expected term shall be determined based on, among other factors, the instrument's contractual term and the effects of employees' expected exercise and post-vesting employment termination behavior. An entity is required to aggregate individual awards into relatively homogeneous groups.

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No definition available.

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- Definition

Share-based compensation expense included in discontinued operations.

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No definition available.

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- Definition

Share conversion ratio in ship building spin-off adjustments.

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- Definition

Share limit issued in connection with awards.

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No definition available.

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- Definition

Share limit issued in connection with other awards.

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No definition available.

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- Definition

The fair value, at the time of grant, for shares expected to be issued in the next fiscal year as a result of any share-based compensation plan other than an employee stock ownership plan (ESOP).

+ References

No definition available.

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- Definition

Number of shares expected to be issued in the next fiscal year as a result of any share-based compensation plan other than an employee stock ownership plan (ESOP).

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No definition available.

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- Definition

The fair value, at the time of grant, for shares issued during the reporting period as a result of any share-based compensation plan other than an employee stock ownership plan (ESOP).

+ References

No definition available.

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- Definition

The fair value, at the time of issuance, of shares issued during the reporting period as a result of any share-based compensation plan other than an employee stock ownership plan (ESOP).

+ References

No definition available.

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- Details

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- Definition

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901

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-Name Accounting Standards Codification

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-Paragraph 2

-Subparagraph (h)(1)(i)

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph g(1)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SAB TOPIC 14.F)

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-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 14

-Section F

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph 64

-Subparagraph b

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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- Definition

As of the balance sheet date, the aggregate unrecognized cost of equity-based awards made to employees under equity-based compensation awards that have yet to vest.

+ References

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- Definition

The weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, using a decimal to express in number of years.

+ References

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- Definition

The total recognized tax benefit related to compensation cost for equity-based payment arrangements recognized in income during the period.

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- Definition

Disclosure of the aggregate tax benefit realized from the exercise of stock options and the conversion of similar instruments during the annual period.

+ References

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- Definition

The date when the equity-based award expires as specified in the award agreement, which may be presented in a variety of ways (for example, year, month and year, day, month and year, quarter of a year).

+ References

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- Definition

Description of the estimated period of time over which an employee is required to provide service in exchange for the equity-based payment award, which often is the vesting period. This period may be explicit or implicit based on the terms of the award, and may be presented in a variety of ways (for example, year, month and year, day, month and year, quarter of a year).

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- Definition

Description of the period of time over 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, which may be expressed in a variety of ways (for example, in years, month and year).

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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 Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph b(2)(c)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph c(1)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(2)(iii)(1)

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

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- Definition

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).

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- Definition

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.

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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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- Definition

The total accumulated difference between fair values of underlying shares on dates of exercise and exercise price on options which were exercised (or share units converted) into shares during the reporting period under the plan.

+ References

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- Definition

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

+ References

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- Definition

Number of shares (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP), net of any shares forfeited. Shares issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 29, 30

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.3-04)

-URI http://asc.fasb.org/extlink&oid=6959260&loc=d3e187085-122770

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-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 12

-Paragraph 10

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 129

-Paragraph 5

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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Stock Compensation Plans and Other Compensation Arrangements (Details 4) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011 Year	Dec. 31, 2010	Dec. 31, 2009
Compensation Expense [Abstract]
Total pre-tax stock-based compensation expense	$ 139	$ 134	$ 101
Unrecognized compensation expense related to unvested awards	144
Weighted-average period for unrecognized compensation expense to be charged to expense (years)	1.4
Stock-based compensation expense included in discontinued operations	3	16	11
Employee service share based compensation unrecognized compensation expense	133
Stock Option And Awards Plans [Abstract]
Share conversion ratio in ship building spin-off adjustments	0.09378
Common stock expected to be issued in 2011 to employees in settlement of prior year stock awards that were fully vested	2,800,000
Fair value of common stock expected to be issued in 2011 - grant date	115
Aggregate number of shares issued or transferred pursuant to awards	39,100,000
Conversion ratio for stock options and stock awards	52.15%
Share limit for every one share issued in connection with awards	4.5
Share limit for every one share issued in connection with other awards	1
Employee Plans
Stock Option And Awards Plans [Abstract]
Vesting period of stock options and stock awards (years)	three or four years
Aggregate number of shares issued or transferred pursuant to awards	6,900,000
Available for future grant	46,000,000
Non-Employee Plans
Stock Option And Awards Plans [Abstract]
Stock option grant expiration period	P10Y
Required service period under 1993 SPND (years)	5 years
Cash Performance Units [Member]
Stock Option And Awards Plans [Abstract]
Achievement of long-term financial goals period	3 years
Stock Option Plan
Compensation Expense [Abstract]
Total pre-tax stock-based compensation expense	14	27	20
Tax benefits recognized in the condensed consolidated statements of operations for stock-based compensation	55	53	40
Realized tax benefits from exercise of stock options	18
Unrecognized compensation expense related to unvested awards	14
Stock Option And Awards Plans [Abstract]
Vesting period of stock options and stock awards (years)	3 to 4 years
Expected option life for executives (years)	6 years
Expected option life for non-executives (years)			5 years
Weighted-average grant date fair value of stock options granted	$ 12	$ 11	$ 7
Total intrinsic value of options exercised	46	42	11
Stock Awards Plan
Compensation Expense [Abstract]
Total pre-tax stock-based compensation expense	125	107	81
Realized tax benefits from issuance of stock awards	37
Unrecognized compensation expense related to unvested awards	130
Stock Option And Awards Plans [Abstract]
Vesting period of stock options and stock awards (years)	3 to 5 years
Fair value of common stock issued - grant date	101	91	161
Fair value of common stock issued - issuance date	$ 87	$ 76	$ 111
Common stock issued to employees in settlement of prior year stock awards that were fully vested	1,400,000	1,300,000	2,500,000
Weighted-average grant date fair value - granted	$ 63	$ 60	$ 45
Stock Option Plan Granted Prior To 2008
Stock Option And Awards Plans [Abstract]
Vesting period of stock options and stock awards (years)	4 years
Stock option vesting percentage per year	25.00%
Stock option grant expiration period	P10Y
Stock Option Plan Granted After 2008
Stock Option And Awards Plans [Abstract]
Vesting period of stock options and stock awards (years)	3 years
Stock option vesting percentage per year	33.00%
Stock option grant expiration period	P7Y
Restricted Share Plan [Member] \| Eight Highest Paid Employees Member
Stock Option And Awards Plans [Abstract]
Restricted Stock forfeiture percentage if objectives are not met	100.00%
Restricted Share Plan [Member] \| Other Employees [Member]
Stock Option And Awards Plans [Abstract]
Restricted Stock forfeiture percentage if objectives are not met	70.00%
Restricted Share Plan [Member] \| Corporate Policy Council [Member]
Stock Option And Awards Plans [Abstract]
Restricted Stock forfeiture percentage if objectives are not met	100.00%
Maximum percentage of original grant that can be earned if financial metrics are met or exceeded	200.00%
Restricted Share Plan [Member] \| Cash Performance Units [Member]
Stock Option And Awards Plans [Abstract]
Restricted Stock forfeiture percentage if objectives are not met	100.00%
Maximum percentage of original grant that can be earned if financial metrics are met or exceeded	200.00%