Stock-Based Compensation (Details) (USD $)	3 Months Ended
	Mar. 31, 2012 Y	Mar. 31, 2011 Y
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Total unrecognized compensation expense	$ 103,000,000	$ 145,000,000
Remaining weighted average vesting period in years	4	5
Option shares granted	1,000,000	2,000,000
Pre-tax compensation expense and related income tax benefit for stock -based incentives
Long-term stock awards	8,000,000	10,000,000
Stock options	5,000,000	5,000,000
Phantom stock awards and stock appreciation rights	5,000,000	3,000,000
Total	18,000,000	18,000,000
Income tax benefit (before valuation allowance)	7,000,000	7,000,000
Company's long-term stock award activity
Unvested stock award shares at January 1	10,000,000	10,000,000
Weighted average grant date fair value	$ 17	$ 19
Stock award shares granted	1,000,000	2,000,000
Weighted average grant date fair value	$ 12	$ 13
Stock award shares vested	2,000,000	1,000,000
Weighted average grant date fair value	$ 17	$ 19
Stock award shares forfeited
Weighted average grant date fair value	$ 18	$ 18
Unvested stock award shares at December 31	9,000,000	11,000,000
Weighted average grant date fair value	$ 16	$ 17
Company's stock option activity
Option shares outstanding, January 1	36,000,000	37,000,000
Weighted average exercise price	$ 21	$ 21
Option shares granted	1,000,000	2,000,000
Weighted average exercise price	$ 12	$ 13
Option shares exercised
Aggregate intrinsic value on date of exercise(A)	1,000,000	1,000,000
Weighted average exercise price	$ 8	$ 8
Option shares forfeited	2,000,000
Weighted average exercise price	$ 18	$ 23
Option shares outstanding, March 31	35,000,000	39,000,000
Weighted average exercise price	$ 21	$ 21
Weighted average remaining option term (in years)	5	6
Option shares vested and expected to vest, March 31	35,000,000	39,000,000
Weighted average exercise price	$ 21	$ 21
Aggregate intrinsic value (A)	26,000,000	33,000,000
Weighted average remaining option term (in years)	5	6
Option shares exercisable (vested), March 31	25,000,000	24,000,000
Weighted average exercise price	$ 23	$ 24
Aggregate intrinsic value (A)	14,000,000	11,000,000
Weighted average remaining option term (in years)	4	4
Weighted average grant date fair value of option shares granted and the assumptions used to estimate those values using a Black-Scholes option pricing model
Weighted average grant date fair value	$ 4.44	$ 5.10
Risk-free interest rate	1.10%	2.72%
Dividend yield	2.57%	2.34%
Volatility factor	51.00%	49.00%
Expected option life	6	6
Stock-Based Compensation (Textual) (Abstract)
Total market value (at the vesting date) of stock award shares	23,000,000	23,000,000
Grant and expire date	No later than 10 years
Approx grant date exercise price	12
Stock option shares forfeited	2,000,000
Long Term Stock Awards [Member]
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Option shares granted	675,110
Company's stock option activity
Option shares granted	675,110
Employee Stock Option [Member]
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Total unrecognized compensation expense	$ 29,000,000	$ 51,000,000
Remaining weighted average vesting period in years	3	3
Stock awards granted subsequent to January 1, 2010 have a vesting period, in years	over 5 years