Company Restructuring (Details 2) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014
Restructuring Reserve
Balance at the beginning of the period	$ 24
Expense incurred	4
Adjustments to liability	(5)
Payments applied against liability	(19)
Balance at the end of the period	4
Employee costs
Restructuring Reserve
Balance at the beginning of the period	21
Expense incurred	3
Adjustments to liability	(6)
Payments applied against liability	(15)
Balance at the end of the period	3
Cumulative amount incurred to date for active programs	92
Exit costs
Restructuring Reserve
Balance at the beginning of the period	3
Expense incurred	1
Adjustments to liability	1
Payments applied against liability	(4)
Balance at the end of the period	1
Cumulative amount incurred to date for active programs	$ 56