Other Events (Details) (Sale of specialty paper business, USD $) In Millions, unless otherwise specified	0 Months Ended
Mar. 21, 2013
Sale of specialty paper business
Other Events
Initial purchase price	$ 130

Represents the initial cash sale price of the sale of business.

No definition available.

Name:	wpp_ContingencyInitialCashSalePrice
Namespace Prefix:	wpp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration