Fair Value Measurements Aggregate Fair Value Of Derivative Financial Instruments And Debt (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012
Estimate of Fair Value, Fair Value Disclosure [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign exchange contracts, Assets	$ 144
Total assets	144
Debt	20,146
Foreign exchange contracts, Liabilities	64
Total liabilities	20,210
Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign exchange contracts, Assets	0
Total assets	0
Debt	19,760
Total liabilities	19,760
Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign exchange contracts, Assets	144
Total assets	144
Debt	386
Foreign exchange contracts, Liabilities	64
Total liabilities	450
Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign exchange contracts, Assets	0
Total assets	0
Debt	0
Total liabilities	$ 0