Long-Term Compensation - Stock Option and Other Share Based Activity (Detail) (USD $)	6 Months Ended
	Jun. 30, 2014
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Number of Options, Beginning balance	6,253,000
Number of Options, Exercised	(357,000)
Number of Options, Forfeited/ Expired	(8,000)
Number of Options, Ending balance	5,888,000
Weighted Average Exercise Price, Ending Balance	$ 36.15
Options Exercisable, Number of Options Ending balance	5,885