Restructuring Reserves (Summary Of Restructuring Costs) (Details) (USD $) In Millions	6 Months Ended
	Jun. 30, 2011
Restructuring charges, opening balance	$ 7
Charges taken	12
Amounts utilized	(4)
Non-cash reductions	(8)
Currency fluctuations	1
Restructuring charges, closing balance	8
Contract Termination Payments [Member]
Restructuring charges, opening balance	2
Charges taken	0
Amounts utilized	0
Non-cash reductions	0
Currency fluctuations	0
Restructuring charges, closing balance	2
Employment Reductions [Member]
Restructuring charges, opening balance	5
Charges taken	4
Amounts utilized	(4)
Non-cash reductions	0
Currency fluctuations	1
Restructuring charges, closing balance	6
Impairment of Long-Lived Assets [Member]
Restructuring charges, opening balance	0
Charges taken	8
Amounts utilized	0
Non-cash reductions	(8)
Currency fluctuations	0
Restructuring charges, closing balance	$ 0