Postretirement Benefit Plans (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Net periodic benefit cost:
Amortization of net actuarial loss	$ 0	$ 1	$ 1	$ 2
Net periodic benefit cost	5	7	11	14
Domestic defined benefit pension plans
Net periodic benefit cost:
Service cost	1		1	1
Interest cost	1	1	2	2
Expected return on plan assets	(1)	(1)	(2)	(2)
Net periodic benefit cost	1	1	2	3
International defined benefit pension plans
Net periodic benefit cost:
Service cost	4	4	8	7
Interest cost	7	7	14	14
Expected return on plan assets	(9)	(8)	(17)	(16)
Amortization of net actuarial loss	2	3	4	6
Net periodic benefit cost	$ 4	$ 6	$ 9	$ 11