Employee Benefit Plans - Investment Strategy (Details) - Pension Plan [Member]	Dec. 31, 2018	Dec. 31, 2017
U.S.
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Pension Plan Assets, Investment Strategy	100.00%	100.00%
Foreign Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Pension Plan Assets, Investment Strategy	100.00%	100.00%
Equity investments | U.S.
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Pension Plan Assets, Investment Strategy	12.00%	12.00%
Equity investments | Foreign Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Pension Plan Assets, Investment Strategy	13.00%	24.00%
Fixed income investments | U.S.
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Pension Plan Assets, Investment Strategy	73.00%	73.00%
Fixed income investments | Foreign Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Pension Plan Assets, Investment Strategy	46.00%	45.00%
Real estate | U.S.
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Pension Plan Assets, Investment Strategy	3.00%	3.00%
Real estate | Foreign Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Pension Plan Assets, Investment Strategy	6.00%	5.00%
Private equity/venture capital | U.S.
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Pension Plan Assets, Investment Strategy	6.00%	6.00%
Private equity/venture capital | Foreign Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Pension Plan Assets, Investment Strategy	24.00%	12.00%
Other | U.S.
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Pension Plan Assets, Investment Strategy	6.00%	6.00%
Other | Foreign Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Pension Plan Assets, Investment Strategy	11.00%	14.00%