Foreign Currency Sale Contracts (Detail) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended			3 Months Ended		6 Months Ended
	Jun. 30, 2013 European Joint Venture USD ($)	Jun. 15, 2012 European Joint Venture USD ($)	Jun. 30, 2013 European Joint Venture USD ($)	Jun. 15, 2012 European Joint Venture USD ($)	Jun. 30, 2013 European Joint Venture EUR (€)	Jun. 30, 2013 HHR New Zealand Holdings Limited USD ($)	Jun. 15, 2012 HHR New Zealand Holdings Limited USD ($)	Jun. 30, 2013 HHR New Zealand Holdings Limited USD ($)	Jun. 15, 2012 HHR New Zealand Holdings Limited USD ($)	Jun. 30, 2013 HHR New Zealand Holdings Limited NZD
Derivative [Line Items]
Transaction Date Range			May 2008-January 2013					July 2011
Transaction Amount	$ 163		$ 163		€ 120	$ 25		$ 25		30
Forward Purchase Date Range			May 2014-January 2016					August 2013
Change in Fair Value Gain (Loss)	$ (2)	$ 5	$ 1	$ 3		$ 2		$ 1	$ (1)