Equity And Earnings Per Share (Schedule Of Basic And Diluted Earnings Per Share) (Detail) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Mar. 31, 2012
Income Statement [Abstract]
Net (Loss) Income from continuing operations	$ (430)		$ 63
Net (Loss) Income from discontinued operations			5
Net (Loss) Income	$ (430)		$ 68
Average shares outstanding	237,000,000		228,000,000
Adjustment to shares outstanding
Weighted Average Shares Outstanding for Computation of Basic Earnings Per Share of Common Stock	237,000,000		228,000,000
Net effect of potentially dilutive shares		[1]		[1]
Weighted Average Shares Outstanding for Computation of Diluted Earnings Per Share of Common Stock	237,000,000		228,000,000
Earnings per share of common stock from continuing operations	$ (1.82)		$ 0.28
Earnings per share of common stock from discontinued operations			$ 0.02
Basic and diluted (loss) earnings per share	$ (1.82)		$ 0.30
Number of options excluded from diluted EPS calculation	0		3,000

[1] The number of options to purchase shares of common stock that were excluded from the calculation of diluted EPS as they are considered to be anti-dilutive were zero and 3,000 for the three months ended March 31, 2013 and 2012, respectively.