Pension And Other Postretirement Benefits (Narrative) (Details) (USD $) In Millions, unless otherwise specified	1 Months Ended	12 Months Ended									5 Months Ended	12 Months Ended			12 Months Ended
	Jan. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008	Dec. 31, 2011 Pension Benefits [Member]	Dec. 31, 2011 Foreign Pension Plans, Defined Benefit [Member]	Dec. 31, 2011 10-Year Moving Average [Member]	Dec. 31, 2011 20-Year Moving Average [Member]	May 31, 2010 United Steelworkers Labor Agreement [Member]	Dec. 31, 2010 United Steelworkers Labor Agreement [Member]	Jun. 24, 2010 United Steelworkers Labor Agreement [Member]	Dec. 31, 2009 United Steelworkers Labor Agreement [Member]	Dec. 31, 2011 Maximum [Member]	Dec. 31, 2008 Maximum [Member]	Dec. 31, 2011 Minimum [Member]	Dec. 31, 2008 Minimum [Member] 20-Year Moving Average [Member]
Defined Benefit Plan Disclosure [Line Items]
Term of labor agreement, in years													4
Number of employees covered by labor agreement													5,400
Number of locations affected by labor agreement													11
Pretax costs related to preparation for and ratification of new agreement												$ 20
After-tax costs related to preparation for and ratification of new agreement												13
Weighted average discount rate used to determine pension benefit obligation			4.90%	5.75%							5.95%			6.15%
Increase in pension liability, plan amendment											166
Increase in net actuarial loss after-tax, plan amendment											108
Increase in net periodic benefit cost, plan amendment											9
Average duration refined yield curve model parallels the plans, years			10
Percentage increase in rate of compensation			3.50%	3.50%	4.00%		3.50%
Period of moving averages used for historical data points used to determine the expected long-term rate of return on plan assets, in years									10	20
Average period over which rate of compensation increases, years							5
Average period of historical returns used to calculate expected future returns, in years			5					4
Expected long term rate of return on plan assets		8.50%	8.50%	8.75%	8.75%	9.00%
10-year moving average of actual performance																9.00%
20-year moving average of actual performance																		9.00%
Health care cost trend rate assumed for next year			6.50%	6.50%	6.50%
Number of years over actual annual healthcare cost trend experience			3
Health care cost trend rate			5.00%	5.00%	5.00%										3.80%		(2.10%)
Cash contribution to pension plans			336	113	128
Value of common stock shares newly issued			600	600	876
Percentage of funded status of pension plans	80.00%
Minimum required cash contribution to pension plan in 2012			650					115
Expenses related to saving and investment plans			$ 139	$ 119	$ 97