Company Restructuring (Details 2) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2012
Restructuring Reserve
Balance at the beginning of the period	$ 10
Expense incurred	5
Payments applied against liability	(8)
Balance at the end of the period	7
Employee costs
Restructuring Reserve
Balance at the beginning of the period	5
Expense incurred	2
Payments applied against liability	(5)
Balance at the end of the period	2
Cumulative amount incurred to date for active programs	77
Exit costs
Restructuring Reserve
Balance at the beginning of the period	5
Expense incurred	3
Payments applied against liability	(3)
Balance at the end of the period	5
Cumulative amount incurred to date for active programs	$ 49