Pensions And Other Postemployment Benefits (Net Periodic Benefit Cost) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 3	$ 3	$ 3
Interest cost	49	48	52
Expected return on plan assets	(48)	(59)	(62)
Amortization of actuarial losses	12	10	4
Amortization of prior service credit	0	0	0
Settlement loss (gain)	0	0	(3)
Curtailment gain	0	0	0
Net periodic cost (credit)	$ 16	$ 2	$ (6)
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Discount rate	3.90%	4.15%	3.85%
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount rate	4.15%	3.85%	4.55%
Expected return on plan assets	5.65%	6.55%	6.95%
Non-U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 14	$ 16	$ 12
Interest cost	13	10	16
Expected return on plan assets	(2)	(2)	(2)
Amortization of actuarial losses	5	11	5
Amortization of prior service credit	0	0	0
Settlement loss (gain)	1	0	1
Curtailment gain	(1)	(2)	0
Net periodic cost (credit)	$ 30	$ 33	$ 32
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Discount rate	2.03%	2.72%	1.77%
Rate of compensation increase	2.96%	3.19%	3.16%
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount rate	2.72%	1.77%	3.49%
Expected return on plan assets	3.22%	3.52%	4.18%
Rate of compensation increase	3.19%	3.16%	3.17%
Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 0	$ 0	$ 0
Interest cost	14	13	15
Expected return on plan assets	0	0	0
Amortization of actuarial losses	2	5	3
Amortization of prior service credit	(4)	(4)	(5)
Settlement loss (gain)	0	0	0
Curtailment gain	0	0	0
Net periodic cost (credit)	$ 12	$ 14	$ 13
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Discount rate	3.98%	4.18%	3.84%
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount rate	4.18%	3.84%	4.45%