Income Taxes (Deferred Income Tax Assets and Liabilities) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Income Tax Disclosure [Abstract]
Deferred Tax Assets, Operating Loss Carryforwards	$ 3,873	$ 3,318
Deferred Tax Assets, Capital Loss Carryforwards	52	51
Deferred Tax Assets, Accruals and Other Liabilities	461	445
Deferred Tax Assets Tax Deferred Expense Reserves and Accruals Noncurrent	1,094	1,073
Deferred Tax Assets, Tax Credit Carryforwards	471	473
Deferred Tax Assets, Pension and Other Postretirement Benefits	324	238
Deferred Tax Assets, Gross, Current	461	445
Deferred Tax Assets, Gross, Noncurrent	5,814	5,153
Deferred Tax Assets, Valuation Allowance, Current	(284)	(210)
Deferred Tax Assets, Valuation Allowance, Noncurrent	(3,580)	(2,355)
Deferred Tax Assets, Net, Noncurrent	2,234	2,798
Deferred Tax Liabilities, Property, Plant and Equipment	1,527	1,792
Deferred Tax Liabilities, Intangible Assets	6,720	6,611
Deferred Tax Liabilities, Investments	855	1,065
Deferred Tax Liabilities, Other	47	50
Deferred Tax Liability Other, noncurrent	118	132
Deferred Tax Liabilities, Current	47	50
Deferred Tax Liabilities, Noncurrent	9,220	9,600
Deferred tax assets	130	185
Deferred Tax Assets (Liabilities), Net, Noncurrent	(6,986)	(6,802)
Income Tax Contingency [Line Items]
Income Tax Expense (Benefit)	$ 254	$ 166	$ (1,058)