Fair Value Information (Fair Value Assets and Liabilities Measured on a Recurring Basis) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Company-owned life insurance ("COLI")	$ 45	$ 46
Available-for-sale securities	15	15
Derivatives, assets	61	70
Total	121	131
Derivatives, liabilities	120	48
Fair Value, Inputs, Level 1 [Member]
Company-owned life insurance ("COLI")	0	0
Available-for-sale securities	15	15
Derivatives, assets	0	0
Total	15	15
Derivatives, liabilities	0	0
Fair Value, Inputs, Level 2 [Member]
Company-owned life insurance ("COLI")	45	46
Available-for-sale securities	0	0
Derivatives, assets	61	70
Total	106	116
Derivatives, liabilities	120	48
Fair Value, Inputs, Level 3 [Member]
Company-owned life insurance ("COLI")	0	0
Available-for-sale securities	0	0
Derivatives, assets	0	0
Total	0	0
Derivatives, liabilities	$ 0	$ 0