Net Periodic (Benefit) Cost Included in Acquisition and Operating Expenses (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Japanese Pension Plan
Schedule of Net Periodic Benefit Costs and Assumptions for Defined Benefit Postretirement Plans [Line Items]
Service cost	$ 17	$ 14	$ 13
Interest cost	12	12	11
Expected return on plan assets	(4)	(4)	(3)
Amortization of net actuarial loss	3	3	3
Net periodic benefit cost	28	25	24
U.S. Pension Plan
Schedule of Net Periodic Benefit Costs and Assumptions for Defined Benefit Postretirement Plans [Line Items]
Service cost	14	13	11
Interest cost	28	26	27
Expected return on plan assets	(14)	(12)	(12)
Amortization of net actuarial loss	6	5	4
Net periodic benefit cost	34	32	30
Other Postretirement Benefit Plans, Defined Benefit
Schedule of Net Periodic Benefit Costs and Assumptions for Defined Benefit Postretirement Plans [Line Items]
Service cost	4	3	3
Interest cost	3	3	3
Expected return on plan assets	0	0	0
Amortization of net actuarial loss	1	1	1
Net periodic benefit cost	$ 8	$ 7	$ 7