Retirement and Deferred Compensation Plans - Changes in Benefit Obligation Fair Value of Plan Assets and Funded Status of Pension and Postretirement Benefit Plans (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Change in Plan Assets
Fair value of plan assets at end of year	$ 170	$ 145
Pension Benefits [Member]
Change in Projected Benefit Obligation
Projected benefit obligation beginning of year	150	136	135
Service cost	5	5	5
Interest cost	7	7	7
Foreign currency exchange rate changes	7	(1)	(4)
Amendments
Actuarial losses (gains)	14	6	(1)
Effect of curtailment and settlements
Benefits paid	(6)	(3)	(6)
Retiree contributions
Projected benefit obligation at end of year	177	150	136
Change in Plan Assets
Fair value of plan assets at beginning of year	145	135	118
Actual return on plan assets	14	4	14
Foreign currency exchange rates	6	(1)	(3)
Employer contributions	11	10	12
Benefits paid	(6)	(3)	(6)
Retiree contributions
Fair value of plan assets at end of year	170	145	135
Funded status at end of year	(7)	(5)	(1)
Amounts recognized in Consolidated Balance Sheet
Non-current liability	(7)	(5)	(1)
Defined Benefit Plans, Liabilities, Total	(7)	(5)	(1)
Pre-tax Amounts Recognized in Accumulated Other Comprehensive Income (Loss)
Accumulated (loss)	(32)	(25)	(15)
Prior service cost
Transition asset (obligation)
Pretax Amounts Recognized in Accumulated Other Comprehensive Income, Total	(32)	(25)	(15)
Weighted Average Assumptions used as of December 31
Discount rate	4.30%	4.70%	5.40%
Salary increases	4.60%	4.60%	5.00%
Expected return on assets	4.70%	4.85%	6.25%
Postretirement Benefits [Member]
Change in Projected Benefit Obligation
Projected benefit obligation beginning of year	30	29	18
Service cost	4	3	2
Interest cost	1	1	1
Amendments
Actuarial losses (gains)	1	(2)	8
Effect of curtailment and settlements
Benefits paid	(1)	(1)
Retiree contributions
Projected benefit obligation at end of year	35	30	29
Change in Plan Assets
Employer contributions	1	1
Benefits paid	(1)	(1)
Retiree contributions
Funded status at end of year	(35)	(30)	(29)
Amounts recognized in Consolidated Balance Sheet
Current liability	(1)	(1)	(1)
Non-current liability	(34)	(29)	(28)
Defined Benefit Plans, Liabilities, Total	(35)	(30)	(29)
Pre-tax Amounts Recognized in Accumulated Other Comprehensive Income (Loss)
Accumulated (loss)	(7)	(6)	(8)
Prior service cost
Transition asset (obligation)
Pretax Amounts Recognized in Accumulated Other Comprehensive Income, Total	$ (7)	$ (6)	$ (8)
Weighted Average Assumptions used as of December 31
Discount rate	3.43%	4.04%	4.93%
Healthcare cost trend
Initial	7.25%	7.50%	8.00%
Ultimate in 2022	5.00%	5.00%	5.00%

Defined benefit plan assumptions used calculating benefit obligation expected return on assets.

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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 pretax net amount of gains and losses that are not yet recognized as a component of net periodic benefit cost, and that are recognized as increases or decreases in other comprehensive income as they arise. Gains and losses are due to changes in the value of either the benefit obligation or the plan assets resulting from experience different from that assumed or from a change in an actuarial assumption, or the consequence of a decision to temporarily deviate from the substantive plan.

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Amount related to the pretax cost of benefit changes attributable to plan participants' prior service pursuant to a plan amendment or a plan initiation, which has not yet been recognized as components of net periodic benefit cost.

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Before tax amount of net transition assets (obligations) which has yet to be recognized as a component of net periodic benefit cost.

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Actual return on plan assets, separately identifying the amount related to assets still held at the reporting date.

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Amount of gain (loss) from a decision to temporarily deviate from the substantive plan, or from a change in benefit obligation or plan asset value from changes in actuarial assumptions, for example, but not limited to, interest, mortality, employee turnover or salary scale.

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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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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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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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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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- Definition

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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- Definition

The amount of increase or decrease due to a change in the terms of an existing plan or the initiation of a new plan. A plan amendment may increase or decrease benefits, including those attributed to years of service already rendered.

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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.

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The ultimate trend rate for health care costs.

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- Definition

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

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- Definition

This represents the entire liability recognized in the balance sheet that is associated with the defined benefit plans.

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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.

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