Debt - Term Loans Narrative (Details) (USD $)	12 Months Ended			3 Months Ended	12 Months Ended					12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 Term Loan [Member]	Dec. 31, 2013 Term Loan [Member]	Dec. 31, 2012 Term Loan [Member]	Nov. 07, 2012 Term Loan [Member]	May 31, 2012 Term Loan [Member]	Dec. 31, 2013 Term Loan [Member] Euro Rate Floor Percentage Per Annum [Member]	Dec. 31, 2013 Term Loan [Member] Base Rate Floor Percentage Per Annum [Member]	Dec. 31, 2013 Term Loan [Member] Maximum
Long-Term Debt Instrument [Line Items]
Credit Facility Commitment Period				five-year
Unsecured Debt							$ 2,000,000,000	$ 4,000,000,000
Net proceeds from issuance of unsecured loan				1,935,000,000
Debt Instrument, Interest Rate, Effective Percentage Rate Range, Minimim					3.50%					4.50%
Base Rate Margin					0.50%
Euro Rate Margin					1.00%
Debt Instrument, Interest Rate, Stated Percentage									1.25%	2.25%
Long-term Debt, Gross	12,886,000,000	12,620,000,000									125,000,000
Losses on purchases of debt and extinguishment of other financing	40,000,000	200,000,000	5,000,000			200,000,000
Write off of Deferred Debt Issuance Cost						86,000,000
Debt Instrument, Unamortized Discount				$ 114,000,000		$ 114,000,000