Changes in Benefit Obligations Plan Assets Funded Status and Reconciliation of Funded Status to Amounts Recognized in Consolidated Balance Sheets and in Accumulated Other Comprehensive Income (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at December 31	$ 69	$ 59
Pension Benefit Obligations
Defined Benefit Plan Disclosure [Line Items]
Amounts Recognized in the Balance Sheet - Current liabilities	(1)	0
Amounts Recognized in the Balance Sheet - Noncurrent liabilities	(52)	(49)
Amounts Recognized in the Balance Sheet - Net amounts recognized	(53)	(49)
Amounts Recognized in Accumulated Other Comprehensive Income - Net actuarial loss (gain)	32	28
Amounts Recognized in Accumulated Other Comprehensive Income - Prior service credit	(2)	(3)
Amounts Recognized in Accumulated Other Comprehensive Income - Total	30	25
Pension Benefit Obligations \| Change In Benefit Obligation
Defined Benefit Plan Disclosure [Line Items]
Benefit obligation at January 1	108	111
Service cost	8	8
Interest cost	4	4
Plan participant contribution	1	1
Actuarial loss (gain)	9	(5)
Benefits paid	(7)	(12)
Currency translation adjustments	(1)	1
Benefit obligation at December 31	122	108
Pension Benefit Obligations \| Change in Plan Assets
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at January 1	59	59
Actual return on plan assets	5	(2)
Company contributions	12	12
Plan participant contribution	1	1
Benefits paid	(7)	(12)
Currency translation adjustments	(1)	1
Fair value of plan assets at December 31	69	59
Funded status (underfunded)	(53)	(49)
Postemployment Benefit Obligations
Defined Benefit Plan Disclosure [Line Items]
Amounts Recognized in the Balance Sheet - Current liabilities	(4)	(5)
Amounts Recognized in the Balance Sheet - Noncurrent liabilities	(21)	(28)
Amounts Recognized in the Balance Sheet - Net amounts recognized	(25)	(33)
Amounts Recognized in Accumulated Other Comprehensive Income - Net actuarial loss (gain)	(16)	(4)
Amounts Recognized in Accumulated Other Comprehensive Income - Prior service credit	0	0
Amounts Recognized in Accumulated Other Comprehensive Income - Total	(16)	(4)
Postemployment Benefit Obligations \| Change In Benefit Obligation
Defined Benefit Plan Disclosure [Line Items]
Benefit obligation at January 1	33	40
Service cost	4	4
Interest cost	1	2
Plan participant contribution	0	0
Actuarial loss (gain)	(11)	(8)
Benefits paid	(2)	(6)
Currency translation adjustments	0	1
Benefit obligation at December 31	25	33
Postemployment Benefit Obligations \| Change in Plan Assets
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at January 1	0	0
Actual return on plan assets	0	0
Company contributions	0	0
Plan participant contribution	0	0
Benefits paid	0	0
Currency translation adjustments	0	0
Fair value of plan assets at December 31	0	0
Funded status (underfunded)	$ (25)	$ (33)

Changes in Benefit Obligations Plan Assets Funded Status and Reconciliation of Funded Status to Amounts Recognized in Consolidated Balance Sheets and in Accumulated Other Comprehensive Income (Detail) (USD $)
In Millions, unless otherwise specified