Employee Retirement Benefits (Net Periodic Pension Expense) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
U.S. Pension Plan
Components of Net Periodic Benefit Cost:
Service cost	$ 0	$ 1	$ 1	$ 2
Interest cost	7	6	11	11
Expected return on plan assets	(7)	(8)	(14)	(16)
Net amortizations	1	1	4	2
Settlement loss	0	1	1	2
Net periodic pension expense (benefit)	1	1	3	1
Non U.S. Pension Plan
Components of Net Periodic Benefit Cost:
Service cost	1	0	1	1
Interest cost	2	2	4	4
Expected return on plan assets	(3)	(4)	(6)	(8)
Net amortizations	0	1	0	1
Settlement loss	0	0	0	0
Net periodic pension expense (benefit)	$ 0	$ (1)	$ (1)	$ (2)