Pensions and Other Post-Retirement Benefits - Total Accumulated Benefit Obligation and Minimum Liability Changes for Pension Plans (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Accumulated benefit obligation	$ 1,618	$ 1,392	$ 1,318
Projected benefit obligation	1,550	849
Accumulated benefit obligation	1,498	802
Fair value of plan assets	1,302	635
Projected benefit obligation	1,647	849
Accumulated benefit obligation	1,582	802
Fair value of plan assets	1,394	635
The Netherlands [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Projected benefit obligation	727	48
Accumulated benefit obligation	724	46
Fair value of plan assets	707	45
Projected benefit obligation	727	48
Accumulated benefit obligation	724	46
Fair value of plan assets	707	45
United States [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Projected benefit obligation	295	284
Accumulated benefit obligation	295	284
Fair value of plan assets	248	221
Projected benefit obligation	295	284
Accumulated benefit obligation	295	284
Fair value of plan assets	248	221
Other [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Projected benefit obligation	528	517
Accumulated benefit obligation	479	472
Fair value of plan assets	347	369
Projected benefit obligation	625	517
Accumulated benefit obligation	563	472
Fair value of plan assets	$ 439	$ 369

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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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.

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- Definition

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.

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- Definition

If aggregate disclosures are presented, the aggregate projected 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.

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