Stock-Based Compensation (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012 Y	Jun. 30, 2011 Y	Jun. 30, 2012 Y	Jun. 30, 2011 Y
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Option shares granted, including restoration options			1,000,000	2,000,000
Pre-tax compensation expense and related income tax benefit for stock -based incentives
Long-term stock awards	$ 11,000,000	$ 9,000,000	$ 19,000,000	$ 19,000,000
Stock options	4,000,000	6,000,000	9,000,000	11,000,000
Phantom stock awards and stock appreciation rights	1,000,000	(1,000,000)	6,000,000	2,000,000
Total	16,000,000	14,000,000	34,000,000	32,000,000
Income tax benefit (before valuation allowance)	6,000,000	5,000,000	13,000,000	12,000,000
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 June 30	9,000,000	11,000,000	9,000,000	11,000,000
Weighted average grant date fair value	$ 16	$ 17	$ 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, including restoration options			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			$ 9	$ 8
Option shares forfeited			3,000,000	2,000,000
Weighted average exercise price			$ 19	$ 22
Option shares outstanding, June 30	34,000,000	37,000,000	34,000,000	37,000,000
Weighted average exercise price	$ 21	$ 21	$ 21	$ 21
Weighted average remaining option term (in years)	5	6	5	6
Option shares vested and expected to vest, June 30	34,000,000	37,000,000	34,000,000	37,000,000
Weighted average exercise price	$ 21	$ 21	$ 21	$ 21
Aggregate intrinsic value (A)	29,000,000	20,000,000	29,000,000	20,000,000
Weighted average remaining option term (in years)			5	6
Option shares exercisable (vested), June 30	26,000,000	24,000,000	26,000,000	24,000,000
Weighted average exercise price	$ 24	$ 24	$ 24	$ 24
Aggregate intrinsic value (A)	15,000,000	8,000,000	15,000,000	8,000,000
Weighted average remaining option term (in years)			4	5
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			3,000,000	2,000,000
Long Term Stock Awards [Member]
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Remaining weighted average vesting period in years			4	5
Option shares granted, including restoration options			761,720
Total unrecognized compensation expense	92,000,000	134,000,000	92,000,000	134,000,000
Company's stock option activity
Option shares granted, including restoration options			761,720
Employee Stock Option [Member]
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
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
Total unrecognized compensation expense	$ 24,000,000	$ 45,000,000	$ 24,000,000	$ 45,000,000