Retirement Benefits - Net Periodic Benefit (Credit) Cost (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
U.S. Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 4	$ 4	$ 8	$ 8
Interest cost	4,485	4,866	8,970	9,735
Expected return on plan assets	(6,181)	(5,219)	(12,362)	(10,315)
Amortization of prior service cost (credit)	3	12	6	24
Net periodic benefit (credit) cost	(1,689)	(337)	(3,378)	(548)
Non-U.S. Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	525	426	1,058	1,003
Interest cost	1,218	1,302	2,448	2,677
Expected return on plan assets	(739)	(752)	(1,487)	(1,505)
Amortization of prior service cost (credit)	8	34	14	1
Curtailment and settlement effects		(2,394)		(2,394)
Net periodic benefit (credit) cost	1,012	(1,384)	2,033	(218)
Other Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Interest cost	285	397	570	793
Amortization of prior service cost (credit)	(29)	(32)	(58)	(65)
Net periodic benefit (credit) cost	$ 256	$ 365	$ 512	$ 728