Employee Benefit Plans Pre-tax Net Changes in Projected Benefit Obligations Recognized in Other Comprehensive Income (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Pension
Total recognized in other comprehensive income	$ (28)	$ 2	$ 7
Postemployment
Actuarial loss (gain) arising during the year	18	2
Amortization of (gain) loss included in net periodic benefit cost	1	1	0
Prior service cost arising during the year	0
Total recognized in other comprehensive income	19	3
Foreign Pension Plan
Pension
Actuarial loss (gain) arising during the year	14	(1)
Amortization of (gain) loss included in net periodic benefit cost	(2)	(2)	(1)
Prior service cost arising during the year	1	0
Recognition of loss due to settlement	(1)	(1)	(1)
Foreign currency exchange	(3)	(1)
Total recognized in other comprehensive income	$ 9	$ (5)

Other Comprehensive (Income) Loss, Postemployment Benefit, Adjustment, before Tax

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Other Comprehensive Income (Loss), Postemployment Benefit, Net Unamortized Gain (Loss) Arising During Period, before Tax

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Postemployment Benefit, Actuarial Loss (Gain)

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Postemployment Benefit, Amounts Recognized in Other Comprehensive Income (Loss), Net Prior Service Cost (Credit), before Tax

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The amount of gains or losses recognized in net periodic benefit cost.

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Amount before tax, after reclassification adjustments, of prior service cost (credit) that has not been recognized in the income statement.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

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- Definition

Amount of net gain (loss) recognized in net periodic benefit cost as a result of an irrevocable action that relieves the employer (or the plan) of 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, but are not limited to, lump-sum cash payments to plan participants in exchange for their rights to receive specified benefits and purchasing nonparticipating annuity contracts to cover vested benefits.

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Amount before tax, after reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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Amount before tax, after reclassification adjustments, of (increase) decrease in accumulated other comprehensive (income) loss related to pension and other postretirement defined benefit plans.

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Amount before tax of (increase) decrease in the value of the projected benefit obligation related to a change in an actuarial assumption and increase (decrease) in the value of the plan assets resulting from experience different from that assumed, that has not been recognized in net periodic benefit (cost) credit.

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