Income Taxes (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Operating Loss Carryforwards [Line Items]
Income (Loss) from Continuing Operations before Income Taxes, Foreign	$ 8,200,000,000	$ 738,000,000	$ 885,000,000
Undistributed Earnings of Foreign Subsidiaries	15,600,000,000	8,600,000,000
Tax Liability Remitted	5,500,000,000	3,000,000,000
Valuation Allowance, Deferred Tax Asset, Change in Amount	9,000,000		9,000,000
Total Gross Unrecognized Tax Benefits	661,000,000	237,000,000	157,000,000	147,000,000
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	602,000,000	195,000,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	18,000,000
Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit	12,000,000
U S Federal [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	397,000,000
Tax Credit Carryforward, Amount	9,000,000
State [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	1,200,000,000
Tax Credit Carryforward, Amount	$ 163,000,000