Fair Value Measurements (Fair Value Assets And Liabilities Measured On A Recurring Basis) (Details) (USD $) In Millions	Jun. 30, 2011	Dec. 31, 2010
Company-owned life insurance ("COLI")	$ 47	$ 46
Available-for-sale securities	16	15
Derivatives, Assets	100	70
Total	163	131
Derivatives, Liabilities	64	48
Level 1 [Member]
Company-owned life insurance ("COLI")
Available-for-sale securities	16	15
Derivatives, Assets	0
Total	16	15
Derivatives, Liabilities
Level 2 [Member]
Company-owned life insurance ("COLI")	47	46
Available-for-sale securities
Derivatives, Assets	100	70
Total	147	116
Derivatives, Liabilities	64	48
Level 3 [Member]
Company-owned life insurance ("COLI")
Available-for-sale securities
Derivatives, Assets
Total
Derivatives, Liabilities