Guarantor Financial Information (Narrative) (Details) (USD $)	Mar. 31, 2013 Ireland Reorganization Note [Member]	Sep. 30, 2009 Ireland Reorganization Note [Member]	Mar. 31, 2005 Senior Notes Due in 2015 [Member]	Dec. 31, 2001 Senior Notes Due in 2015 [Member]
Stated interest rate for debt instruments				4.75%
Principal amount of notes		$ 15,000,000,000	$ 300,000,000
Settlement of net intercompany payables		4,100,000,000
Amount outstanding	$ 10,800,000,000