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				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Earnings Per Share [Abstract]
Net income (loss) for basic EPS	$ 26		$ (28)		$ 30		$ (74)
Convertible note interest, net of tax	1		0		1		0
Net income (loss) for diluted EPS	$ 27		$ (28)		$ 31		$ (74)
Basic weighted average shares outstanding	105.1		108.4		105.8		108.0
Options, warrants and non-vested stock	1.9	[1],[2]	0	[1],[2]	2.0	[1],[2]	0	[1],[2]
Convertible debt	4.0	[3]	0	[3]	4.0	[3]	0	[3]
Diluted weighted average shares outstanding	111.0		108.4		111.8		108.0
Basic (US$ per share)	$ 0.25		$ (0.26)		$ 0.29		$ (0.69)
Diluted (US$ per share)	$ 0.24		$ (0.26)		$ 0.28		$ (0.69)
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Anti-dilutive shares			0				3.5
Options [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Anti-dilutive shares			1.2				1.2
Warrants [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Anti-dilutive shares			0				4.6
Convertible Debt Securities [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Anti-dilutive shares			4.6				4.6

[1] (a) For the three months ended June 30, 2014, there are no anti-dilutive securities which were excluded from the computation of diluted earnings per share. For the six months ended June 30, 2014, the number of anti-dilutive securities which were excluded from the computation of diluted earnings per share was not significant.

[2] (b) As the Company incurred a net loss for the three and six months ended June 30, 2013, 1.2 million outstanding options, 4.6 million warrants and 3.5 million non-vested stock awards have an anti-dilutive effect and therefore were excluded from the computation of diluted weighted average shares outstanding.

[3] (c) For the three and six months ended June 30, 2013, 4.6 million issuable shares underlying the 3½% convertible notes due 2014 have an anti-dilutive effect and therefore were excluded from the computation of diluted weighted average shares outstanding.