Special Charges for Restructuring Activities - Changes in Restructuring Liabilities (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified	6 Months Ended
Jun. 30, 2014
Restructuring And Related Activities [Abstract]
Non-cash charges	$ 2.4

Other expenses or losses included in net income that result in no cash outflows or inflows in the period and are not separately disclosed.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

Name:	us-gaap_OtherNoncashExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration