Employer Sponsored Benefit Plan (Assumptions Used in Determining the Year-End Benefit Obligation and Annual Net Cost) (Detail) - Domestic Pension Plan	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Benefit Obligation
Discount rate	4.21%	4.56%
Expected return on plan assets	6.30%	7.00%
Net Cost
Discount rate	4.56%	4.16%	5.09%
Expected return on plan assets	7.00%	7.25%	7.25%