Pensions Benefit Plans and Other Postretirement Benefits - Net Amount Recognized Included in Consolidated Balance Sheets (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Net amount recognized included in the Consolidated Balance Sheets
Pension assets	$ 44	$ 49
U.S. | Pension Benefit Plans
Net amount recognized included in the Consolidated Balance Sheets
Current pension liability and nonpension postretirement benefit, included with Other accrued liabilities	(3)	(2)
Pension benefits and nonpension postretirement benefits	(316)	(254)
Accumulated other comprehensive loss	785	812
Net amount recognized	466	556
U.S. | Other Postretirement Benefits
Net amount recognized included in the Consolidated Balance Sheets
Current pension liability and nonpension postretirement benefit, included with Other accrued liabilities	(6)	(8)
Pension benefits and nonpension postretirement benefits	(68)	(81)
Accumulated other comprehensive loss	7	3
Net amount recognized	(67)	(86)
Non-U.S. | Pension Benefit Plans
Net amount recognized included in the Consolidated Balance Sheets
Pension assets	44	49
Current pension liability and nonpension postretirement benefit, included with Other accrued liabilities	(5)	(5)
Pension benefits and nonpension postretirement benefits	(218)	(217)
Accumulated other comprehensive loss	289	282
Net amount recognized	110	109
Non-U.S. | Other Postretirement Benefits
Net amount recognized included in the Consolidated Balance Sheets
Current pension liability and nonpension postretirement benefit, included with Other accrued liabilities	(3)	(3)
Pension benefits and nonpension postretirement benefits	(77)	(86)
Accumulated other comprehensive loss	(2)	(7)
Net amount recognized	$ (82)	$ (96)