Income Taxes (Narrative) (Details) (USD $)	3 Months Ended			6 Months Ended
	Sep. 30, 2013	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2014 Minimum [Member]	Jun. 30, 2014 Maximum [Member]
Income Tax Contingency [Line Items]
Valuation Allowance, Deferred Tax Asset, Change in Amount	$ 2,100,000,000
Deferred tax assets, net		2,001,726,000	2,086,754,000
Gross unrecognized tax benefits		159,700,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued		35,400,000
Possible decrease in unrecognized tax benefits		$ 127,900,000
Income Tax Examination, Year under Examination				2004	2014