Pension and Postretirement Benefit Plans - Amounts Recognized in the Balance Sheet and Amounts Recognized in AOCI (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Amounts recognized in the balance sheet:
Noncurrent assets	$ 2	$ 3
Noncurrent liabilities	$ (521)	$ (580)
United States Pension Plan of US Entity [Member]
Amounts recognized in the balance sheet:
Current liabilities
Noncurrent liabilities	$ (199)	$ (201)
Net amount recognized	(199)	(201)
Amounts recognized in AOCI:
Net actuarial loss (gain)	$ 513	$ 491
Prior service cost
AOCI before tax	$ 513	$ 491
Deferred taxes
Net	$ 513	$ 491
Foreign Pension Plan [Member]
Amounts recognized in the balance sheet:
Noncurrent assets	2	3
Current liabilities	(10)	(10)
Noncurrent liabilities	(240)	(274)
Net amount recognized	(248)	(281)
Amounts recognized in AOCI:
Net actuarial loss (gain)	$ 83	103
Prior service cost		3
AOCI before tax	$ 83	106
Deferred taxes	(21)	(25)
Net	62	81
Foreign Postretirement Benefit Plan [Member]
Amounts recognized in the balance sheet:
Current liabilities	(4)	(5)
Noncurrent liabilities	(82)	(105)
Net amount recognized	(86)	(110)
Amounts recognized in AOCI:
Net actuarial loss (gain)	$ (15)	$ (9)
Prior service cost
AOCI before tax	$ (15)	$ (9)
Deferred taxes	4	3
Net	$ (11)	$ (6)