Pension and Postretirement Benefit Plans - Amounts Recognized in the Balance Sheet and Amounts Recognized in AOCI (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Amounts recognized in the balance sheet:
Noncurrent assets	$ 4	$ 3
Noncurrent liabilities	(459)	(561)
Pension Plan [Member] | UNITED STATES
Amounts recognized in the balance sheet:
Current liabilities
Noncurrent liabilities	(48)	(200)
Net amount recognized	(48)	(200)
Amounts recognized in AOCI:
Net actuarial loss (gain)	157	542
AOCI before tax	157	542
Deferred taxes	13	(6)
Net	170	536
Pension Plan [Member] | Foreign Plan [Member]
Amounts recognized in the balance sheet:
Noncurrent assets	4	3
Current liabilities	(13)	(13)
Noncurrent liabilities	(325)	(283)
Net amount recognized	(334)	(293)
Amounts recognized in AOCI:
Net actuarial loss (gain)	108	84
AOCI before tax	108	84
Deferred taxes	(28)	(22)
Net	80	62
Other Postretirement Benefits Plan [Member] | UNITED STATES
Amounts recognized in the balance sheet:
Noncurrent liabilities	(3)
Net amount recognized	(3)
Amounts recognized in AOCI:
Net actuarial loss (gain)	1
AOCI before tax	1
Net	1
Other Postretirement Benefits Plan [Member] | Foreign Plan [Member]
Amounts recognized in the balance sheet:
Current liabilities	(5)	(5)
Noncurrent liabilities	(83)	(78)
Net amount recognized	(88)	(83)
Amounts recognized in AOCI:
Net actuarial loss (gain)	(12)	(15)
AOCI before tax	(12)	(15)
Deferred taxes	4	4
Net	$ (8)	$ (11)