Valuation and Qualifying Accounts (Schedule of Valuation and Qualifying Accounts) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011		Dec. 31, 2010		Dec. 31, 2009
Balance at Beginning of Period	$ 287
Balance at End of Period	229		287
Changes to foreign tax credit valuation allowances					(54)
Currency effects of translating valuation allowances	7		(8)		(9)
Valuation Allowances and Reserves, Period Increase (Decrease)	(58)		43
Allowance for Doubtful Accounts [Member]
Balance at Beginning of Period	62		68		52
Charged to Costs and Expenses	5		7		22
Charged to Other Accounts	(5)	[1]	0		7	[1]
Deductions	5	[2]	13	[2]	13	[2]
Balance at End of Period	57		62		68
Deferred Taxes [Member]
Balance at Beginning of Period	287		244		319
Charged to Costs and Expenses	(51)	[3]	35	[3]	(84)	[4]
Charged to Other Accounts	0		0		0
Deductions	7	[4]	(8)	[4]	(9)	[4]
Balance at End of Period	229		287		244
Allowances for Sales Discounts [Member]
Balance at Beginning of Period	18		21		21
Charged to Costs and Expenses	275		266		272
Charged to Other Accounts	0		0		1	[1]
Deductions	272	[5]	269	[5]	273	[5]
Balance at End of Period	$ 21		$ 18		$ 21

[1] Includes bad debt recoveries and the effects of changes in foreign currency exchange rates.

[2] Primarily uncollectible receivables written off.

[3] Includes decreasing foreign tax credit valuation allowances related to taxes provided on equity affiliates’ unremitted earnings of $(54) million in 2009.

[4] Includes the net currency effects of translating valuation allowances at current rates of exchange, totaling $7 million in 2011, $(8) million in 2010, and $(9) million in 2009.

[5] Sales discounts allowed.