Stock-Based Compensation Plans (Summary Of Stock Option Activity) (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Options outstanding, at beginning of period, Number of Shares	2,476,645
Options outstanding, at beginning of period, Weighted-Average Exercise Price (in dollars per share)	$ 28.99
Options granted, Number of Shares	436,043
Options granted, Weighted-Average Exercise Price (in dollars per share)	$ 23.00
Options exercised, Number of Shares	(165,036)
Options exercised, Weighted-Average Exercise Price (in dollars per share)	$ 16.81
Options forfeited or expired, Number of Shares	(421,855)
Options forfeited or expired, Weighted-Average Exercise Price (in dollars per share)	$ 38.72
Options outstanding, at end of period, Number of Shares	2,325,797
Options outstanding, at end of period, Weighted-Average Exercise Price (in dollars per share)	$ 26.97
Options exercisable, at end of period, Number of Shares	1,751,602
Options exercisable, at end of period, Weighted-Average Exercise Price (in dollars per share)	$ 28.19
Options expected to vest, at end of period, Number of Shares	538,731
Options expected to vest, at end of period, Weighted-Average Exercise Price (in dollars per share)	$ 23.24