Company Restructuring (Details 2) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015
Restructuring Reserve
Balance as of December 31, 2014	$ 4
Expense incurred	(1)
Adjustments to liability	(1)
Payments applied against liability	(1)
Balance as of March 31, 2015	3
Employee costs
Restructuring Reserve
Balance as of December 31, 2014	3
Expense incurred	(1)
Adjustments to liability	(1)
Payments applied against liability	(1)
Balance as of March 31, 2015	2
Cumulative amount incurred to date for active programs	69
Exit costs
Restructuring Reserve
Balance as of December 31, 2014	1
Expense incurred	0
Adjustments to liability	0
Payments applied against liability	0
Balance as of March 31, 2015	1
Cumulative amount incurred to date for active programs	$ 51