Consolidated Statements of Comprehensive Income (Loss) (Unaudited) (Parenthetical) (USD $) In Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Other Comprehensive Income (Loss):
Tax on foreign currency translation	$ (1)	$ 1	$ 0	$ 1
Defined benefit plans:
Tax on amortization of prior service cost and unrecognized gains and losses included in total benefit cost	(1)	2	2	5
Tax on net actuarial losses	1	0	1	0
Tax on immediate recognition of prior service cost and unrecognized gains and losses due to curtailments and settlements	1	0	1	0
Tax on deferred derivative loss	0	0	0	0
Tax on reclassification adjustment for amounts recognized in income	0	0	0	0
Tax on unrealized investment gains	$ 0	$ 0	$ 0	$ 0