Segment Information (Details Textuals) (USD $) In Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Segment information
Segment revenue reallocated to other segments		$ 36		$ 70
Segment operating income reallocated to other segments		18		34
Total Benefits related to potential legal liabilities	9		9
Other Benefits related to potential legal liabilities	6		6
Global [Member]
Segment information
Segment revenue reallocated from other segment		34		65
Segment operating income reallocated from other segment		18		34
North America [Member]
Segment information
Segment revenue reallocated from other segment		2		5
Segment operating income reallocated from other segment		$ 0		$ 0