Earnings Per Share (Computation Of Basic And Diluted EPS) (Details) (USD $) In Millions, except Per Share data	3 Months Ended				6 Months Ended
	Jun. 30, 2011		Jun. 30, 2010		Jun. 30, 2011		Jun. 30, 2010
Earnings Per Share
Net income	$ 114		$ 95		$ 186		$ 145
Basic weighted average shares outstanding	167		180		170		180
Stock options, SSARs and restricted stock units ("RSUs")	3	[1]	4	[1]	3	[1]	3	[1]
Warrants			3	[2]	1	[2]	3	[2]
Diluted weighted average shares outstanding	170		187		174		186
Earnings per share
Basic	$ 0.68		$ 0.53		$ 1.10		$ 0.81
Diluted	$ 0.67		$ 0.51		$ 1.07		$ 0.78

[1] Includes unvested dilutive RSUs which are subject to future forfeitures.

[2] Represents the dilutive effect of warrants to purchase shares of the Company's common stock related to the May 2009 issuance of the Company's convertible notes (see Note 6 — Long-Term Debt and Borrowing Arrangements).