Income Taxes (Details) - USD ($)	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2015	Dec. 31, 2014	Jul. 20, 2007
Withholding Tax Percentage Proposed				30.00%
IRS Assertion Of Additional Taxes Due				$ 84,000,000
IRS Assertion of Additional Withholding Tax Due				$ 25,000,000
Unrecognized Tax Benefits		$ 493,000,000	$ 343,800,000
2003 to 2006 Tax Years [Member]
IRS Assertion Of Additional Taxes Due		665,000,000
IRS Assertion of Additional Withholding Tax Due		455,000,000
2002 to 2006 Tax Years [Member]
IRS Assertion Of Additional Taxes Due		$ 210,000,000
Penalty Percentage On Asserted Underpayment Of Income Tax On Dividends		20.00%
Additional Withholding Tax Due		$ 230,000,000
Additional Income Tax Charge On 2015 Tax Settlement		227,000,000
Second Half Of 2015 Expected Cash Outflow From 2015 Tax Settlement		375,000,000
Net Interest On Underpayment Of Income Tax		$ 145,000,000.00
Tax Year 2002 [Member]
Income Tax Examination, Estimate of Possible Loss	$ 109,000,000