Pension Benefit Plans (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
U.S Pension Plans
Components of net periodic pension cost
Service cost	$ 4	$ 6
Interest cost	24	24
Expected asset return	(38)	(42)
Amortization:
Actuarial loss	15	19
Net periodic pension cost	5	7
Increase in pension liability	60
Non-U.S. Pension Plans
Components of net periodic pension cost
Service cost	4	4
Interest cost	13	12
Expected asset return	(21)	(21)
Amortization:
Actuarial loss	5	$ 5
Net periodic pension cost	$ 1