Employee Benefit Plans (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011		Dec. 31, 2010		Dec. 31, 2009
Defined Benefit Plan Disclosure [Line Items]
General Description of employee benefit plans	The Company has funded and non-funded non-contributory defined benefit pension plans, which cover substantially all of its employees. For some employees, benefits are based on final average earnings and length of service, while benefits for other employees are based on an account balance that takes into consideration age, service and earnings during their career. The Company provides certain health care and life insurance benefits for its retired employees, their beneficiaries and covered dependents (“other postretirement benefits”). The health care plan is contributory; the life insurance plan is non-contributory. Substantially all of the Company’s U.S. employees may become eligible to receive other postretirement benefits if they retire after age 55 with at least 10 years of service or under certain circumstances after age 50 with at least 20 years of continuous service. The Company has elected to amortize its transition obligation for other postretirement benefits over 20 years.
Determining the discount rate for Defined Benefit Obligation	The domestic discount rate used to value the pension and postretirement obligations at December 31, 2011 and December 31, 2010 is based upon the value of a portfolio of Aa investments whose cash flows would be available to pay the benefit obligation's cash flows when due. The portfolio is selected from a compilation of approximately 550 Aa-rated bonds across the full range of maturities. Since yields can vary widely at each maturity point, the Company generally avoids using the highest and lowest yielding bonds at the maturity points, so as to avoid relying on bonds that might be mispriced or misrated. This refinement process generally results in having a distribution from the 10th to 90th percentile. The Aa portfolio is then selected and, accordingly, its value is a measure of the benefit obligation at December 31, 2011 and December 31, 2010. A single equivalent discount rate is calculated to equate the value of the Aa portfolio to the cash flows for the benefit obligation. The result is rounded to the nearest 5 basis points and the benefit obligation is recalculated using the rounded discount rate.
Percentage of annual salary Contributed by the Company for employees (401(k) plans)	4.00%
Other Liabilities [Member]
Defined Benefit Plan Disclosure [Line Items]
Net accumulated liability for non-retiree postemployment benefits provided to former or inactive employee	$ 34		$ 33
General And Administrative Expenses [Member]
Defined Benefit Plan Disclosure [Line Items]
Discretionary contributions from the Company to defined benefit or other plans	54		52		53
Lower Limit [Member]
Defined Benefit Plan Disclosure [Line Items]
Bond Yield rate used in determining Discount rate	10.00%
Upper Limit [Member]
Defined Benefit Plan Disclosure [Line Items]
Bond Yield rate used in determining Discount rate	90.00%
Non Qualified Pension Plans Defined Benefit [Member] | Rabbi Trust [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan Obligation	834		860
Discretionary contributions from the Company to defined benefit or other plans			95
Defined Benefit Plan Assets	404		390
Non Qualified Pension Plans Defined Benefit [Member] | Rabbi Trust [Member] | Discontinued Operations [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan Obligation	78		74
Defined Benefit Plan Assets	134		124
Foreign Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension benefits for foreign plans percentage of the ending benefit obligation	19.00%		13.00%
Percentage of plan assets	3.00%		2.00%
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan Obligation	11,113		9,198		8,855
Defined Benefit Plan Assets	11,812		10,533		9,591
Percentage of plan assets	100.00%		100.00%
Benefit obligation increase (decrease) related to plan amendments	(72)		0
Net periodic (benefit) cost	39	[1]	(36)	[1]	(44)	[1]
Expected long-term rate of return on plan assets	6.75%
Anticipated employer pension cash contributions for next year	480
Pension Plans, Defined Benefit [Member] | Separate Account Assets [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan Assets	8,262		6,944
Pension Plans, Defined Benefit [Member] | Annuity Contracts [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan Obligation	18		20
Pension Plans, Defined Benefit [Member] | Discontinued Operations [Member]
Defined Benefit Plan Disclosure [Line Items]
Net periodic (benefit) cost	(18)		(4)		5
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan Obligation	2,277		2,129		2,131
Defined Benefit Plan Assets	1,344		1,495		1,519
Percentage of plan assets	100.00%		100.00%
Benefit obligation increase (decrease) related to plan amendments	0		0
Net periodic (benefit) cost	48		45		51
Expected long-term rate of return on plan assets	7.00%
Anticipated employer pension cash contributions for next year	$ 10

[1] Includes net periodic (benefit) cost for pensions of ($18) million, ($4) million and $5 million for 2011, 2010 and 2009, respectively, that have been classified as discontinued operations.