Fair Value Measurements (Fair Value Assets And Liabilities Measured On A Recurring Basis) (Details) (USD $) In Millions	Sep. 30, 2011	Dec. 31, 2010
Company-owned life insurance ("COLI")	$ 43	$ 46
Available-for-sale securities	14	15
Derivatives, Assets	68	70
Total	125	131
Derivatives, Liabilities	163	48
Level 1 [Member]
Company-owned life insurance ("COLI")	0	0
Available-for-sale securities	14	15
Derivatives, Assets	0	0
Total	14	15
Derivatives, Liabilities	0	0
Level 2 [Member]
Company-owned life insurance ("COLI")	43	46
Available-for-sale securities	0	0
Derivatives, Assets	68	70
Total	111	116
Derivatives, Liabilities	163	48
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