Retirement Plans and Other Retiree Benefits Additional Disclosures (Details) (USD $) In Millions, unless otherwise specified	4 Months Ended	12 Months Ended			8 Months Ended	12 Months Ended							12 Months Ended											12 Months Ended
	Dec. 31, 2010	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Aug. 31, 2010 United States Pension Plans of US Entity, Defined Benefit [Member]	Dec. 31, 2011 United States Pension Plans of US Entity, Defined Benefit [Member]	Dec. 31, 2010 United States Pension Plans of US Entity, Defined Benefit [Member]	Dec. 31, 2009 United States Pension Plans of US Entity, Defined Benefit [Member]	Dec. 31, 2011 United States Pension Plans of US Entity, Defined Benefit [Member] Real estate [Member] Level 3 [Member]		Dec. 31, 2010 United States Pension Plans of US Entity, Defined Benefit [Member] Real estate [Member] Level 3 [Member]		Dec. 31, 2011 United States Pension Benefits [Member] Real estate [Member] Level 3 [Member]	Dec. 31, 2010 United States Pension Benefits [Member] Real estate [Member] Level 3 [Member]	Dec. 31, 2011 International Pension Benefits [Member]	Dec. 31, 2010 International Pension Benefits [Member]	Dec. 31, 2009 International Pension Benefits [Member]	Dec. 31, 2011 International Pension Benefits [Member] Real estate [Member] Level 3 [Member]		Dec. 31, 2010 International Pension Benefits [Member] Real estate [Member] Level 3 [Member]		Dec. 31, 2011 Pension Benefits [Member]	Dec. 31, 2010 Pension Benefits [Member]	Dec. 31, 2011 Other Retiree Benefits [Member]	Dec. 31, 2010 Other Retiree Benefits [Member]	Dec. 31, 2009 Other Retiree Benefits [Member]	Dec. 31, 2011 Other Retiree Benefits [Member] Real estate [Member] Level 3 [Member]		Dec. 31, 2010 Other Retiree Benefits [Member] Real estate [Member] Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of equity securities invested in the Company's common stock (in hundredths)						11.00%	9.00%
Dividends received by plans on the Company's common stock						$ 3	$ 3
Change in Benefit Obligations
Benefit obligations at beginning of year					1,703	1,952	1,703								736	706								762	603
Interest cost						100	94	95							36	35	37							39	38	36
Participants' contributions						1	1								4	3								0	0
Acquisitions/plan amendments						0	58								1	2								0	31
Actuarial loss (gain)						126	150								21	24								(1)	97
Foreign exchange impact						0	0								(10)	(10)								(6)	3
Termination benefits						0	23								0	0								0	8
Curtailments and settlements						0	0								(14)	(5)								1	0
Benefit payments						(178)	(119)								(33)	(36)								(29)	(25)
Benefit obligations at end of year						2,025	1,952	1,703							760	736	706							776	762	603
Change in Plan Assets
Fair value of plan assets at beginning of year					1,300	1,377	1,300		62	[1]	55	[1]	55	48	434	401		16	[1]	11				32	28		2	[1]	0	[1]
Earned income, net of management expenses													9	4				0		0
Actual return on plan assets						28	145								2	30								0	4
Unrealized gain (loss) on investment													2	3				1		1
Purchases, sales, issuances and settlements, net													(2)	0				1		4
Company's benefit plan contributions		(178)	(35)	(73)		198	50								45	36								29	25
Participants' contributions						1	1								4	3								0	0
Foreign exchange impact						0	0								(3)	4								0	0
Settlements						0	0								(12)	(4)								0	0
Benefit payments						(178)	(119)								(33)	(36)								(29)	(25)
Fair value of plan assets at end of year						1,426	1,377	1,300	62	[1]	55	[1]	64	55	437	434	401	18	[1]	16	[1]			32	32	28	2	[1]	0	[1]
Funded Status
Benefit obligations at end of year						2,025	1,952	1,703							760	736	706							776	762	603
Fair value of plan assets at end of year						1,426	1,377	1,300	62	[1]	55	[1]	64	55	437	434	401	18	[1]	16	[1]			32	32	28	2	[1]	0	[1]
Net amount recognized						(599)	(575)								(323)	(302)								(744)	(730)
Amounts Recognized in Balance Sheet
Noncurrent assets						0	0								0	4								0	0
Current liabilities	67	84	67			15	13								29	13								40	41
Noncurrent liabilities						584	562								294	293								704	689
Net amount recognized						(599)	(575)								(323)	(302)								(744)	(730)
Amounts recognized in Accumulated other comprehensive income consist of
Actuarial loss						855	693								174	142								323	343
Transition/prior service cost						73	81								6	8								32	32
Amounts recognized in accumulated other comprehensive income						928	774								180	150								355	375
Accumulated benefit obligation						1,892	1,808								688	654								0	0
Weighted-Average Assumptions Used to Determine Benefit Obligations
Discount Rate						4.90%	5.30%								4.59%	5.04%								5.26%	5.30%
Long-term rate of return on plan assets (in hundredths)						7.75%	8.00%								5.91%	6.23%								7.75%	8.00%
Long-term rate of compensation increase (in hundredths)						4.00%	4.00%								2.87%	3.05%								0.00%	0.00%
ESOP growth rate (in hundredths)						0.00%	0.00%								0.00%	0.00%								10.00%	10.00%
Long-term rate of return on plan assets [Abstract]
Average annual rates of return for the most recent 1-year period (in hundredths)						3.00%
Average annual rates of return for the most recent 5-year period (in hundredths)						3.00%
Average annual rates of return for the most recent 10-year period (in hundredths)						6.00%
Average annual rates of return for the most recent 15-year period (in hundredths)						7.00%
Average annual rates of return for the most recent 25-year period (in hundredths)						8.00%
Benefit Obligation Exceeds Fair Value of Plan Assets
Projected benefit obligation																						2,770	2,664
Fair value of plan assets																						1,809	1,749
Accumulated benefit obligation																						2,525	2,268
Fair value of plan assets																						1,773	1,571
Assumed medical cost trend rates [Abstract]
Medical cost trend rate assumed for next fiscal year (in hundredths)																								8.00%
Ultimate medical cost trend rate (in hundredths)																								5.00%
Year which ultimate medical cost trend rate is reached																								2018
Defined Benfit Plan Health Care Cost Trend Rate After Ultimate Trend Rate Is Reached																								5.00%
Defined Benefit Plan Estimated Future Voluntary Contributions In Next Fiscal Year						100
Effect of a 1% change in the assumed medical cost trend rate [Abstract]
Effect of one percentage point increase on accumulated postretirement benefit obligation																								89
Effect of one percentage point decrease on accumulated postretirement benefit obligation																								(74)
Effect of one percentage point increase on annual expense																								8
Effect of one percentage point decrease on annual expense																								(6)
Components of Net Periodic Benefit Cost
Service Cost including ESOP						24	42								19	17								10	7
Service cost						24	42	42							19	17	15							12	13	10
Interest cost						100	94	95							36	35	37							39	38	36
Annual ESOP allocation						0	0	0							0	0	0							(2)	(6)	(7)
Expected return on plan assets						(110)	(99)	(89)							(27)	(26)	(23)							(3)	(2)	(2)
Amortization of transition and prior service costs (credits)						9	5	4							3	3	3							2	1	0
Amortization of actuarial loss						46	52	50							9	9	5							16	19	13
Net periodic benefit cost						69	94	102							40	38	37							64	63	50
Other postretirement charges						0	23	0							3	1	0							1	8	0
Total pension cost						69	117	102							43	39	37							65	71	50
Weighted-Average Assumptions Used to Determine Net Periodic Benefit Cost
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	4.75%				5.75%	5.30%		6.30%							5.04%	5.41%	5.88%							5.30%	5.75%	5.80%
Long-term rate of return on plan assets (in hundredths)						8.00%	8.00%	8.00%							6.23%	6.58%	6.70%							8.00%	8.00%	8.00%
Long-term rate of compensation increase (in hundredths)						4.00%	4.00%	4.00%							3.05%	3.35%	3.33%							0.00%	0.00%	0.00%
ESOP growth rate (in hundredths)						0.00%	0.00%	0.00%							0.00%	0.00%	0.00%							10.00%	10.00%	10.00%
Voluntary contributions to postretirement plans						178	35	73
Amounts recognized in Other Comprehensive Income [Abstract]
Net actuarial loss & prior service costs arising during the period, before-tax		249
Amortization of net actuarial loss, transition & prior service costs, before-tax		(85)
Total amount recognized in other comprehensive income, before-tax		(164)	(220)	11
Net actuarial loss & prior service costs arising during the period, net-of-tax		163
Amortization of net actuarial loss, transition & prior service costs, net-of-tax		(55)
Total amount recognized in other comprehensive income, net-of-tax		(108)	(143)	8
Estimated amounts that will be amortized from accumulated other comprehensive income [Abstract]
Net actuarial loss																						69		16
Net transition & prior service cost																						10		2
Exected Benefit Payments From Company Assets		87
Total benefit payments [Abstract]
2012						137									59									41
2013						125									41									42
2014						124									44									43
2015						126									45									44
2016						125									47									44
2017 - 2021						$ 663									$ 222									$ 232

[1] Real estate is valued using the NAV per unit of funds that are invested in real property, and the real property is valued using independent market appraisals. Since the appraisals include unobservable inputs, the investments in each fund are classified as Level 3.