Comprehensive Income - Components of Other Comprehensive Income (Loss) and Related Tax Effects (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Cash flow hedges: Before-Tax Amount
Gains (losses) arising during period, Before-Tax Amount		$ 1	$ 1
Amounts reclassified from accumulated other comprehensive income, Before-Tax Amount		(1)		(1)
Net gains (losses) on cash flow hedges, Before-Tax Amount			1	(1)
Defined benefit pension and postretirement benefit plans: Before-Tax Amount
Gains (losses) arising during the year, Before-Tax Amount
Amounts reclassified from accumulated other comprehensive income, Before-Tax Amount			1	1
Net gains (losses) on defined benefit pension and postretirement benefit plans, Before-Tax Amount			1	1
Foreign Currency Translation Adjustments: Before-Tax Amount
Foreign Currency Translation Adjustments, Before-Tax Amount	(36)	(49)	(50)	(10)
Other comprehensive income, Before-Tax Amount	(36)	(49)	(48)	(10)
Cash flow hedges: Tax (Expense) or Benefit
Gains (losses) arising during period, Tax (Expense) or Benefit
Amounts reclassified from accumulated other comprehensive income, Tax (Expense) or Benefit
Net gains (losses) on cash flow hedges, Tax (Expense) or Benefit
Defined benefit pension and postretirement benefit plans: Tax (Expense) or Benefit
Gains (losses) arising during the year, Tax (Expense) or Benefit
Amounts reclassified from accumulated other comprehensive income, Tax (Expense) or Benefit
Net gains (losses) on defined benefit pension and postretirement benefit plans, Tax (Expense) or Benefit
Foreign Currency Translation Adjustments: Tax (Expense) or Benefit
Foreign Currency Translation Adjustments, Tax (Expense) or Benefit
Other comprehensive income, Tax (Expense) or Benefit
Cash flow hedges: Net-of-Tax Amount
Gains (losses) arising during period, Net-of-Tax Amount		1	1
Amounts reclassified from accumulated other comprehensive income, Net-of-Tax Amount		(1)		(1)
Net gains (losses) on cash flow hedges, Net-of-Tax Amount			1	(1)
Defined benefit pension and postretirement benefit plans: Net-of-Tax Amount
Gains (losses) arising during the year, Net-of-Tax Amount
Amounts reclassified from accumulated other comprehensive income, Net-of-Tax Amount			1	1
Net gains (losses) on defined benefit pension and postretirement benefit plans, Net-of-Tax Amount			1	1
Foreign Currency Translation Adjustments: Net-of-Tax Amount
Foreign Currency Translation Adjustments, Net-of-Tax Amount	(36)	(49)	(50)	(10)
Other comprehensive income, Net-of-Tax Amount	$ (36)	$ (49)	$ (48)	$ (10)