Employee Benefit Plans Schedule of Pension and Postemployment Benefit Costs (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Postemployment
Service cost	$ 4	$ 3	$ 4
Interest cost	1	1	1
Amortization of actuarial loss (gain)	(1)	(1)	0
Amortization of prior service cost (credit)	0	0	0
Total costs	4	3	5
Foreign Pension Plan
Pension
Service cost	9	8	8
Interest cost	4	4	4
Expected return on plan assets	(2)	(2)	(3)
Settlement charge	1	1	1
Amortization of actuarial loss (gain)	2	2	1
Amortization of prior service cost (credit)	(1)	0	0
Total costs	$ 13	$ 13	$ 11