Debt And Lines Of Credit (Summary Of Long-Term Debt) (Details) (USD $)	12 Months Ended					12 Months Ended		12 Months Ended		12 Months Ended			12 Months Ended				12 Months Ended		12 Months Ended		12 Months Ended		12 Months Ended				12 Months Ended		12 Months Ended		12 Months Ended		12 Months Ended		12 Months Ended																12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2007	Dec. 31, 2012 8.7% To 10% Notes - Due 2038 [Member]	Dec. 31, 2011 8.7% To 10% Notes - Due 2038 [Member]	Dec. 31, 2012 9 3/8% Note - Due 2019 [Member]	Dec. 31, 2011 9 3/8% Note - Due 2019 [Member]	Dec. 31, 2012 9.25% Debentures - Due 2011 [Member]	Dec. 31, 2012 7.95% Debentures - Due 2018 [Member]	Dec. 31, 2011 7.95% Debentures - Due 2018 [Member]	Dec. 31, 2012 7.5% Notes - Due 2021 [Member]	Dec. 31, 2011 7.5% Notes - Due 2021 [Member]	Dec. 31, 2012 7.4% Debentures - Due 2014 [Member]	Dec. 31, 2011 7.4% Debentures - Due 2014 [Member]	Dec. 31, 2012 7.3% Notes - Due 2039 [Member]	Dec. 31, 2011 7.3% Notes - Due 2039 [Member]	Dec. 31, 2012 6 7/8% Notes - Due 2023 - 2029 [Member]	Dec. 31, 2011 6 7/8% Notes - Due 2023 - 2029 [Member]	Dec. 31, 2012 6.65% To 6.75% Notes - Due 2011 & 2037 [Member]	Dec. 31, 2011 6.65% To 6.75% Notes - Due 2011 & 2037 [Member]	Dec. 31, 2012 6.4% To 7.75% Debentures Due 2025 - 2027 [Member]	Dec. 31, 2011 6.4% To 7.75% Debentures Due 2025 - 2027 [Member]	Dec. 31, 2012 6 3/8% to 6 5/8% notes – due 2016 – 2018 [Member]	Dec. 31, 2011 6 3/8% to 6 5/8% notes – due 2016 – 2018 [Member]	Dec. 31, 2012 6.0% notes - due 2041 [Member]	Dec. 31, 2011 6.0% notes - due 2041 [Member]	Dec. 31, 2012 5.85% Notes - Due 2012 [Member]	Dec. 31, 2011 5.85% Notes - Due 2012 [Member]	Dec. 31, 2012 5.25% To 5.5% Notes - Due 2014 - 2016 [Member]	Dec. 31, 2011 5.25% To 5.5% Notes - Due 2014 - 2016 [Member]	Dec. 31, 2012 4.75% notes - due 2022 [Member]	Dec. 31, 2011 4.75% notes - due 2022 [Member]	Dec. 31, 2012 Floating Rate Notes - Due 2011 - 2017 [Member]		Dec. 31, 2011 Floating Rate Notes - Due 2011 - 2017 [Member]		Dec. 31, 2012 Environmental And Industrial Development Bonds - Due 2011-2035 [Member]		Dec. 31, 2011 Environmental And Industrial Development Bonds - Due 2011-2035 [Member]		Dec. 31, 2012 Short-Term Notes [Member]		Dec. 31, 2011 Short-Term Notes [Member]		Dec. 31, 2012 Other [Member]		Dec. 31, 2011 Other [Member]		Dec. 31, 2012 Foreign Denominated Debt And Commercial Loans [Member]	Dec. 31, 2011 Foreign Denominated Debt And Commercial Loans [Member]	Dec. 31, 2012 Interest Rate Swap Unwind [Member] Other [Member]	Dec. 31, 2011 Interest Rate Swap Unwind [Member] Other [Member]
Debt					$ 2,140,000,000	$ 263,000,000	$ 273,000,000	$ 846,000,000	$ 844,000,000		$ 1,462,000,000	$ 1,505,000,000	$ 999,000,000	$ 999,000,000	$ 303,000,000	$ 303,000,000	$ 721,000,000	$ 725,000,000	$ 130,000,000	$ 130,000,000	$ 4,000,000	$ 4,000,000	$ 142,000,000	$ 141,000,000	$ 373,000,000	$ 0	$ 585,000,000	$ 600,000,000	$ 0	$ 38,000,000	$ 701,000,000	$ 701,000,000	$ 899,000,000	$ 900,000,000	$ 314,000,000	[1]	$ 356,000,000	[1]	$ 1,812,000,000	[2]	$ 1,958,000,000	[2]					$ 331,000,000	[3]	$ 152,000,000	[3]	$ 29,000,000	$ 173,000,000
Short-term Debt																																											255,000,000	[4]	279,000,000	[4]
Total debt	10,140,000,000	[5]	9,908,000,000	[5]
Less: current maturities	(444,000,000)		(719,000,000)
Long-term debt	9,696,000,000		9,189,000,000
Weighted average interest rate																																			2.60%		1.90%		5.60%		5.50%		2.20%		5.00%						5.60%	5.90%
Unamortized gain (loss) on interest rate swap unwinds																																																					61,000,000	79,000,000
Debt fair value	$ 12,300,000,000		$ 11,200,000,000
Interest rates range, minimum	1.625%					8.70%															6.65%		6.40%				6.00%		5.85%		5.25%		4.75%
Interest rates range, maximum	9.375%					10.00%															6.75%		7.75%								5.50%
Maturity date						2038		2019		2011	2018		2021	2021	2014		2039										2041		2012				2022
Interest rate								9.375%		9.25%	7.95%		7.50%	7.50%	7.40%		7.30%		6.875%
Maturity date, range low																			2023		2011		2025								2014				2011				2011
Maturity date, range high																			2029		2037		2027								2016				2017				2035

[1] The weighted average interest rate on these notes was 2.6% in 2012 and 1.9% in 2011.

[2] The weighted average interest rate on these bonds was 5.6% in 2012 and 5.5% in 2011.

[3] Includes $61 million at December 31, 2012 and $79 million at December 31, 2011, related to the unamortized gain on interest rate swap unwinds (see Note 13).

[4] The weighted average interest rate was 2.2% in 2012 and 5.0% in 2011. Includes $29 million at December 31, 2012 and $173 million at December 31, 2011 related to non-U.S. denominated borrowings with a weighted average interest rate of 5.6% in 2012 and 5.9% in 2011.

[5] The fair market value was approximately $12.3 billion at December 31, 2012 and $11.2 billion at