Expected Benefit Payments (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011
Japanese Pension Plan
Schedule of Postemployment Expected Future Benefit Payments [Line Items]
2012	$ 11
2013	10
2014	11
2015	12
2016	11
2017-2021	68
U.S. Pension Plan
Schedule of Postemployment Expected Future Benefit Payments [Line Items]
2012	17
2013	18
2014	19
2015	20
2016	27
2017-2021	157
Other Postretirement Benefit Plans, Defined Benefit
Schedule of Postemployment Expected Future Benefit Payments [Line Items]
2012	2
2013	2
2014	2
2015	3
2016	3
2017-2021	$ 22