Pension and Other Postretirement Benefits - Weighted Average Assumptions Used to Determine Net Periodic Benefit Costs (Parenthetical) (Detail)		12 Months Ended
	Jul. 01, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Other Postretirement Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Updated discount rate	4.95%	4.15%	5.00%	4.10%