Amounts to be Reflected as Component of Net Periodic Benefit Cost (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net actuarial loss	$ 5
Prior service cost	(4)
Total	1
United States Pension Plans of US Entity, Defined Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net actuarial loss	230	190
Prior service cost	1	1
Total	231	191
Net actuarial loss	8
Prior service cost	0
Total expected amounts that will be amortized from accumulated other comprehensive income in 2013	8
Foreign
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net actuarial loss	172	137
Prior service cost	5	7
Total	177	144
Net actuarial loss	9
Prior service cost	1
Total expected amounts that will be amortized from accumulated other comprehensive income in 2013	$ 10