Pension And Other Benefit Programs (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Defined Benefit Plan Disclosure [Line Items]
Benefit cost	$ 1	$ 2	$ 3	$ 5
Common stock shares reserved for future issuance	6.1		6.1
Non-U.S. Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Cost or expenses included in compensation and benefit expense	4	3	11	10
Benefit cost	0	1	1	2
U.S. Defined Contribution Savings Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Cost or expenses included in compensation and benefit expense	1	1	3	3
Percentage of employer contributions			100.00%
Percentage of eligible employee contributions receiving employer contributions			4.00%
Employee Stock Purchase Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Cost or expenses included in compensation and benefit expense				4
Common stock shares reserved for future issuance	3.7		3.7
Percentage of fair market value of common stock			85.00%
Percentage of discount to employees on purchase of common stock under ESPP			15.00%
Offering periods for ESPP shares, months			6
Employer Retirement Contributions [Member]
Defined Benefit Plan Disclosure [Line Items]
Cost or expenses included in compensation and benefit expense	$ 1	$ 1	$ 4	$ 3