Income Taxes Income Before Income Taxes (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Before Income Taxes [Line Items]
Total income before income taxes	$ 1,884	$ 1,251	$ 1,553
Ireland
Income Before Income Taxes [Line Items]
Total income before income taxes	184	0	0
Foreign
Income Before Income Taxes [Line Items]
Total income before income taxes	$ 1,700	$ 1,251	$ 1,553