XML 42 R94.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Employee plans - Schedule of Weighted-Average Assumptions (Details)
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Pension Plans | U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Discount rate 4.50% 3.87% 4.38%
Expected long-term rate of return on assets 6.80% 6.80% 6.80%
Weighted-average assumptions used to determine benefit obligations at December 31 were as follows:      
Discount rate 3.53% 4.50% 3.87%
Pension Plans | International Plans      
Defined Benefit Plan Disclosure [Line Items]      
Discount rate 2.55% 2.24% 2.34%
Expected long-term rate of return on assets 4.18% 4.38% 5.30%
Weighted-average assumptions used to determine benefit obligations at December 31 were as follows:      
Discount rate 1.82% 2.55% 2.24%
Other Postretirement Benefit Plans      
Defined Benefit Plan Disclosure [Line Items]      
Discount rate 5.67% 5.30% 5.53%
Expected long-term rate of return on assets 5.50% 5.50% 5.50%
Weighted-average assumptions used to determine benefit obligations at December 31 were as follows:      
Discount rate 5.13% 5.67% 5.30%