Restructuring Charges (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Restructuring Reserve [Roll Forward]
December 31, 2015			$ 51
Charge to Earnings	$ 29	$ 54	116	$ 145
Cash Paid			(88)
Non-cash and Other			(12)
September 30, 2016	67		67
Employee termination costs
Restructuring Reserve [Roll Forward]
December 31, 2015			30
Charge to Earnings			86
Cash Paid			(68)
Non-cash and Other			3
September 30, 2016	51		51
Asset impairment costs
Restructuring Reserve [Roll Forward]
December 31, 2015			0
Charge to Earnings			15
Cash Paid			0
Non-cash and Other			(15)
September 30, 2016	0		0
Facility exit costs
Restructuring Reserve [Roll Forward]
December 31, 2015			3
Charge to Earnings			8
Cash Paid			(10)
Non-cash and Other			0
September 30, 2016	1		1
Other exit costs
Restructuring Reserve [Roll Forward]
December 31, 2015			18
Charge to Earnings			7
Cash Paid			(10)
Non-cash and Other			0
September 30, 2016	$ 15		$ 15