Company Restructuring (Details 2) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2013
Restructuring Reserve
Balance at the beginning of the period	$ 9
Expense incurred	37
Payments applied against liability	(9)
Balance at the end of the period	37
Employee costs
Restructuring Reserve
Balance at the beginning of the period	6
Expense incurred	34
Payments applied against liability	(6)
Balance at the end of the period	34
Cumulative amount incurred to date for active programs	106
Exit costs
Restructuring Reserve
Balance at the beginning of the period	3
Expense incurred	3
Payments applied against liability	(3)
Balance at the end of the period	3
Cumulative amount incurred to date for active programs	$ 52