Derivative Instruments and Fair Value Measurements (Total Notional Amounts of the Company's Derivative Instruments) (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Derivative Instruments and Fair Value Measurements [Abstract]
Notional amount of foreign currency exchange contracts	$ 921	$ 1,265
Notional amount of interest rate contracts	2,150	600
Notional amount of commodity contracts	102	175
Notional amount of derivative instruments, total	$ 3,173	$ 2,040