Financial Instruments and Fair Value Measures (Details 5) (USD $) In Millions, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Book values
Assets
Investments	$ 118	$ 108
Liabilities
Short-term borrowings	251	413
Current portion of long-term debt and lease obligations	20	18
Long-term debt and lease obligations, excluding fair value hedges	14,730	14,724
Approximate fair values
Assets
Investments	161	129
Liabilities
Short-term borrowings	251	413
Current portion of long-term debt and lease obligations	20	18
Long-term debt and lease obligations, excluding fair value hedges	$ 14,666	$ 14,493