Earnings Per Share (Computation Of Basic And Diluted Earnings Per Share) (Detail) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Mar. 31, 2012
Earnings Per Share [Abstract]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ (46)		$ (23)
Weighted Average Number of Shares Outstanding, Basic	107.7	[1]	105.9	[1]
Basic (US$ per share)	$ (0.43)		$ (0.22)
Diluted (US$ per share)	$ (0.43)		$ (0.22)

[1] As the Company incurred a net loss for the three months ended March 31, 2013 and 2012, all outstanding stock options, restricted stock units, stock warrants and issuable shares underlying the 3½% convertible notes due 2014 have an anti-dilutive effect and therefore are excluded from the computation of diluted weighted average shares outstanding. Accordingly, basic and diluted weighted average shares outstanding are equal for such periods.