Stock-Based Compensation (Incentive Equity Awards Granted By The Company) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	6 Months Ended
	Jun. 30, 2011		Feb. 24, 2011
Unrecognized compensation expense	$ 84.0
Incentive equity awards vesting ratably over a period, in years	2.9
Restricted Stock Units (RSUs) [Member]
Number of units, beginning balance	6.9
Number of units, granted	1.5	[1]
Number of units, vested/exercised	(2.8)
Number of units, canceled	(0.4)
Number of units, ending balance	5.2	[2],[3]
Weighted average grant price, beginning balance	$ 12.35
Weighted average grant price, granted	$ 30.66
Weighted average grant price, vested/exercised	$ 11.59
Weighted average grant price, canceled	$ 14.23
Weighted average grant price, ending balance	$ 17.83	[2]
Shares outstanding, expected to vest	5.0
SSARs [Member]
Number of units, beginning balance	2.2
Number of units, granted	0.1	[1]
Number of units, vested/exercised	0
Number of units, canceled	0
Number of units, ending balance	2.3	[2],[4]
Weighted average grant price, beginning balance			$ 11.22
Weighted average grant price, ending balance			$ 11.22
Weighted average exercise price, beginning balance	$ 21.28
Weighted average exercise price, granted	$ 30.61
Weighted average exercise price, vested/exercised	$ 0.00
Weighted average exercise price, canceled	$ 0.00
Weighted average exercise price, ending balance	$ 21.78	[2]
Shares exercisable	1.7
Shares, intrinsic value	$ 28
Weighted average remaining contractual life, years	3.0

[1] Primarily represents awards granted by the Company on February 24, 2011.

[2] Aggregate unrecognized compensation expense related to RSUs and SSARs was $84 million as of June 30, 2011 which is expected to be recognized over a weighted average period of 2.9 years.

[3] Approximately 5 million RSUs outstanding as of June 30, 2011 are expected to vest over time.

[4] Approximately 1.7 million of the 2.3 million SSARs are exercisable as of June 30, 2011. The Company assumes that all unvested SSARs are expected to vest over time. SSARs outstanding as of June 30, 2011 had an intrinsic value of $28 million and have a weighted average remaining contractual life of 3 years.