Postemployment Benefit Plans (Details) (USD $)	12 Months Ended
Dec. 31, 2013 plan	Dec. 31, 2012	Dec. 31, 2011
Change in projected benefit obligation
Projected benefit obligation, beginning of period	$ 2,009,000,000	$ 1,760,000,000
Actuarial (gains) losses, net	(99,000,000)	117,000,000
Service cost	83,000,000	81,000,000
Interest cost	90,000,000	85,000,000
Currency exchange rate changes	(11,000,000)	19,000,000
Benefits paid	(76,000,000)	(71,000,000)
Participant contributions	4,000,000	3,000,000
Special termination benefits	1,000,000	1,000,000
Settlements and curtailments	5,000,000	14,000,000
Projected benefit obligation, end of period	2,006,000,000	2,009,000,000
Change in plan assets
Fair value of plan assets, beginning of period	1,370,000,000	1,120,000,000
Actual return on plan assets	194,000,000	144,000,000
Currency exchange rate changes	(10,000,000)	15,000,000
Employer contributions	115,000,000	159,000,000
Participant contributions	4,000,000	3,000,000
Benefits paid	(76,000,000)	(71,000,000)
Fair value of plan assets, end of period	1,597,000,000	1,370,000,000
Funded status, end of period	(409,000,000)	(639,000,000)
Balance sheet classification, end of period:
Pension asset, non-current	8,000,000	3,000,000
Accrued pension liability, current	(29,000,000)	(30,000,000)
Accrued pension liability, non-current	(388,000,000)	(612,000,000)
Accumulated other comprehensive income (loss)	(311,000,000)	(555,000,000)
Aggregate projected benefit obligation and fair value of plan assets for plans with a projected benefit obligation in excess of plan assets
Projected benefit obligation	2,006,000,000	1,992,000,000
Fair value of plan assets	1,597,000,000	1,352,000,000
Accumulated benefit obligation for all defined benefit pension plans
Accumulated benefit obligation	1,700,000,000	1,700,000,000
Aggregate accumulated benefit obligation and fair value of plan assets for plans with an accumulated benefit obligation in excess of plan assets
Accumulated benefit obligation	1,637,000,000	1,648,000,000
Fair value of plan assets	1,467,000,000	1,246,000,000
U.S. Plans
Postemployment Benefit Plans
Number of other unfunded supplemental benefit plans	2
Number of funded defined benefit plans assumed in mergers and acquisitions	2
Number of unfunded defined benefit plans assumed in mergers and acquisitions	2
Weighted average assumptions used to determine benefit obligations
Discount rate (as a percent)	5.01%	4.19%
Compensation trend rate (as a percent)	4.24%	4.21%
Weighted-average assumptions used to determine net periodic benefit costs
Discount rate (as a percent)	4.19%	4.67%	5.49%
Expected rate of return (as a percent)	7.48%	7.47%	8.49%
Compensation trend rate (as a percent)	4.22%	4.22%	4.24%
Change in projected benefit obligation
Projected benefit obligation, beginning of period	1,452,000,000	1,260,000,000
Actuarial (gains) losses, net	(147,000,000)	128,000,000
Service cost	55,000,000	49,000,000	43,000,000
Interest cost	63,000,000	59,000,000	58,000,000
Benefits paid	(45,000,000)	(45,000,000)
Special termination benefits	1,000,000	1,000,000
Settlements and curtailments	1,000,000
Projected benefit obligation, end of period	1,380,000,000	1,452,000,000	1,260,000,000
Change in plan assets
Fair value of plan assets, beginning of period	948,000,000	769,000,000
Actual return on plan assets	149,000,000	116,000,000
Employer contributions	64,000,000	108,000,000
Benefits paid	(45,000,000)	(45,000,000)
Fair value of plan assets, end of period	1,116,000,000	948,000,000	769,000,000
Funded status, end of period	(264,000,000)	(504,000,000)
Balance sheet classification, end of period:
Accrued pension liability, current	(2,000,000)	(3,000,000)
Accrued pension liability, non-current	(262,000,000)	(501,000,000)
Accumulated other comprehensive income (loss)	(198,000,000)	(469,000,000)
Aggregate projected benefit obligation and fair value of plan assets for plans with a projected benefit obligation in excess of plan assets
Projected benefit obligation	1,380,000,000	1,452,000,000
Fair value of plan assets	1,116,000,000	948,000,000
Aggregate accumulated benefit obligation and fair value of plan assets for plans with an accumulated benefit obligation in excess of plan assets
Accumulated benefit obligation	1,210,000,000	1,255,000,000
Fair value of plan assets	1,116,000,000	948,000,000
Non-U.S. Plans
Postemployment Benefit Plans
Number of unfunded defined benefit plans	2
Number of funded benefit plans	7
Weighted average assumptions used to determine benefit obligations
Discount rate (as a percent)	4.92%	5.37%
Compensation trend rate (as a percent)	4.57%	4.38%
Weighted-average assumptions used to determine net periodic benefit costs
Discount rate (as a percent)	5.13%	5.43%	5.73%
Expected rate of return (as a percent)	5.79%	6.07%	6.42%
Compensation trend rate (as a percent)	4.21%	4.61%	4.62%
Change in projected benefit obligation
Projected benefit obligation, beginning of period	499,000,000	447,000,000
Actuarial (gains) losses, net	55,000,000	(15,000,000)
Service cost	27,000,000	31,000,000	21,000,000
Interest cost	25,000,000	24,000,000	22,000,000
Currency exchange rate changes	(11,000,000)	19,000,000
Benefits paid	(28,000,000)	(23,000,000)
Participant contributions	2,000,000	2,000,000
Settlements and curtailments	4,000,000	14,000,000
Projected benefit obligation, end of period	573,000,000	499,000,000	447,000,000
Change in plan assets
Fair value of plan assets, beginning of period	422,000,000	351,000,000
Actual return on plan assets	45,000,000	28,000,000
Currency exchange rate changes	(10,000,000)	15,000,000
Employer contributions	50,000,000	49,000,000
Participant contributions	2,000,000	2,000,000
Benefits paid	(28,000,000)	(23,000,000)
Fair value of plan assets, end of period	481,000,000	422,000,000	351,000,000
Funded status, end of period	(92,000,000)	(77,000,000)
Balance sheet classification, end of period:
Pension asset, non-current	8,000,000	3,000,000
Accrued pension liability, current	(23,000,000)	(24,000,000)
Accrued pension liability, non-current	(77,000,000)	(56,000,000)
Accumulated other comprehensive income (loss)	(114,000,000)	(80,000,000)
Aggregate projected benefit obligation and fair value of plan assets for plans with a projected benefit obligation in excess of plan assets
Projected benefit obligation	573,000,000	482,000,000
Fair value of plan assets	481,000,000	404,000,000
Aggregate accumulated benefit obligation and fair value of plan assets for plans with an accumulated benefit obligation in excess of plan assets
Accumulated benefit obligation	374,000,000	335,000,000
Fair value of plan assets	351,000,000	298,000,000
Non-U.S. Plans \| Aker Drilling
Postemployment Benefit Plans
Number of funded defined benefit plans assumed in mergers and acquisitions	3
OPEB Plans
Weighted average assumptions used to determine benefit obligations
Discount rate (as a percent)	4.54%	3.63%
Weighted-average assumptions used to determine net periodic benefit costs
Discount rate (as a percent)	3.39%	4.27%	4.94%
Health care cost trend rate, initial (as a percent)	8.07%	8.08%	8.08%
Health care cost trend rate, ultimate (as a percent)	5.00%	5.00%	5.00%
Change in projected benefit obligation
Projected benefit obligation, beginning of period	58,000,000	53,000,000
Actuarial (gains) losses, net	(7,000,000)	4,000,000
Service cost	1,000,000	1,000,000
Interest cost	2,000,000	2,000,000
Benefits paid	(3,000,000)	(3,000,000)
Participant contributions	2,000,000	1,000,000
Projected benefit obligation, end of period	53,000,000	58,000,000	53,000,000
Change in plan assets
Employer contributions	1,000,000	2,000,000
Participant contributions	2,000,000	1,000,000
Benefits paid	(3,000,000)	(3,000,000)
Funded status, end of period	(53,000,000)	(58,000,000)
Balance sheet classification, end of period:
Accrued pension liability, current	(4,000,000)	(3,000,000)
Accrued pension liability, non-current	(49,000,000)	(55,000,000)
Accumulated other comprehensive income (loss)	1,000,000	(6,000,000)
Aggregate projected benefit obligation and fair value of plan assets for plans with a projected benefit obligation in excess of plan assets
Projected benefit obligation	53,000,000	58,000,000
Aggregate accumulated benefit obligation and fair value of plan assets for plans with an accumulated benefit obligation in excess of plan assets
Accumulated benefit obligation	$ 53,000,000	$ 58,000,000

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The amount of decrease that relates to an irrevocable action that relieves the employer (or the plan) of the primary responsibility for a benefit obligation and eliminates significant risks related to the obligation and the assets used to effect the settlement. Examples of transactions that constitute a settlement include (a) making lump-sum cash payments to plan participants in exchange for their rights to receive specified benefits and (b) purchasing nonparticipating annuity contracts. It also includes the amount of decrease that is related to an event that significantly reduces the expected years of future service of present employees or eliminates for a significant number of employees the accrual of defined benefits for some or all of their future services.

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Represents the number of funded defined benefit plans.

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Represents the number of funded defined benefit plans assumed in mergers and acquisitions.

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Represents the number of other unfunded supplemental benefit plans which provide certain eligible employees with benefits in excess of those allowed under the U.S. Plan.

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Represents the number of unfunded defined benefit plans of the entity.

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Represents the number of unfunded defined benefit plans assumed in mergers and acquisitions.

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No definition available.

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For defined benefit pension plans, the actuarial present value of benefits (whether vested or nonvested) attributed by the pension benefit formula to employee service rendered before a specified date and based on employee service and compensation (if applicable) before that date. The accumulated benefit obligation differs from the projected benefit obligation in that it includes no assumption about future compensation levels. For plans with flat-benefit or nonpay-related pension benefit formulas, the accumulated benefit obligation and the projected benefit obligation are the same.

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The pretax total of net gain (loss), prior service cost (credit), and transition assets (obligations), as well as minimum pension liability if still remaining, included in accumulated other comprehensive income associated with a defined benefit pension or other postretirement plan(s) because they have yet to be recognized as components of net periodic benefit cost.

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The difference between fair value of plan assets at the end of the period and the fair value at the beginning of the period, adjusted for contributions and payments of benefits during the period, and after adjusting for taxes and other expenses, as applicable.

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-Glossary Actual Return on Plan Assets (Component of Net Periodic Postretirement Benefit Cost)

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Amount of gain (loss) related to change in benefit obligation resulting from changes in actuarial assumptions, for example, but not limited to, interest, mortality, employee turnover, salary, and temporary deviation from the substantive plan.

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The amount for overfunded plans recognized in the balance sheet as a noncurrent asset associated with a defined benefit pension plan or other postretirement defined benefit plan.

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The interest rate used to adjust for the time value of money for the plan.

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Expected rate of compensation increases (for pay-related plans).

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The interest rate used to adjust for the time value of money.

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An assumption as to the rate of return on plan assets reflecting the average rate of earnings expected on the funds invested or to be invested to provide for the benefits included in the benefit obligation.

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Expected rate of compensation increases (for pay-related plans).

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1) For defined benefit pension plans, the benefit obligation is the projected benefit obligation, which is the actuarial present value as of a date of all benefits attributed by the pension benefit formula to employee service rendered prior to that date. 2) For other postretirement defined benefit plans, the benefit obligation is the accumulated postretirement benefit obligation, which is the actuarial present value of benefits attributed to employee service rendered to a particular date.

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The amount of payments made for which participants are entitled under a pension plan, including pension benefits, death benefits, and benefits due on termination of employment. Also includes payments made under a postretirement benefit plan, including prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services. This item represents a periodic decrease to the plan obligations and a decrease to plan assets.

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The increase in the fair value of plan assets from contributions made by the employer.

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The amount of contributions made by plan participants. This item represents a periodic increase to the plan obligation and an increase to plan assets.

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Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets.

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Amount of gain (loss) from foreign currency exchange rate changes for benefit obligation for plans of a foreign operation whose functional currency is not the reporting currency.

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The amount of increase or decrease in plan assets attributed to foreign currency changes. The effects of foreign currency exchange rate changes that are to be disclosed are those applicable to plans of a foreign operation whose functional currency is not the reporting currency.

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The funded status is measured as the difference between the fair value of plan assets and the benefit obligation. Will normally be the same as the net Defined Benefit Plan, Amounts Recognized in Balance Sheet, Total.

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The assumed health care cost trend rate for the next year used to measure the expected cost of benefits covered by the plan (gross eligible charges). This is based upon the annual rate of change in the cost of health care benefits currently provided by the postretirement benefit plan, due to factors other than changes in the composition of the plan population by age and dependency status.

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The increase in a defined benefit pension plan's projected benefit obligation or a defined benefit postretirement plan's accumulated postretirement benefit obligation due to the passage of time.

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If aggregate disclosures are presented, the aggregate pension accumulated benefit obligation for pension plans with accumulated benefit obligations in excess of plan assets as of the measurement date of each statement of financial position presented.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

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If aggregate disclosures are presented, the aggregate fair value of plan assets for pension plans with accumulated benefit obligations in excess of plan assets as of the measurement date of each statement of financial position presented.

+ References

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If aggregate disclosures are presented, the aggregate benefit obligation for plans with benefit obligations in excess of plan assets as of the measurement date of each statement of financial position presented.

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If aggregate disclosures are presented, the aggregate fair value of plan assets for plans with benefit obligations in excess of plan assets as of the measurement date of each statement of financial position presented.

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The actuarial present value of benefits attributed by the pension benefit formula to services rendered by employees during the period. The portion of the expected postretirement benefit obligation attributed to employee service during the period. The service cost component is a portion of the benefit obligation and is unaffected by the funded status of the plan.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (h)(1)

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-Name Accounting Standards Codification

-Glossary Service Cost (Component of Net Periodic Pension Cost)

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-Topic 715

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-Section 50

-Paragraph 1

-Subparagraph (a)(1)

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The amount of increase related to special termination benefits offered to and accepted by employees in connection with their termination of employment that are only offered for a short period of time. A situation involving termination benefits may also involve a curtailment.

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The ultimate trend rate for health care costs.

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For a classified balance sheet, the amount recognized in balance sheet as a current liability associated with an underfunded defined benefit plan.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Current Liabilities

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-Topic 715

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-Topic 715

-SubTopic 20

-Section 45

-Paragraph 2

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This represents the noncurrent liability for underfunded plans recognized in the balance sheet that is associated with the defined benefit pension plans and other postretirement defined benefit plans.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.24)

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