Employee Benefit Plans (Weighted Average Assumptions Used to Determine Benefit Obligation for Defined Benefit Pension and Other Postretirement Plans) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
Return on plan assets assumption	5.40%	5.40%	6.10%
Impact on Net Periodic Pension Expense - Next Twelve Months	$ 12
Discount rate used to calculate benefit obligation	3.70%	3.20%
Rate of compensation increase	1.20%	1.30%
United States
Defined Benefit Plan Disclosure [Line Items]
Discount rate used to calculate benefit obligation	4.40%	3.70%
Rate of compensation increase	1.50%	1.50%
International
Defined Benefit Plan Disclosure [Line Items]
Discount rate used to calculate benefit obligation	2.90%
Rate of compensation increase	0.90%