Leases (Tables)

12 Months Ended

Dec. 31, 2018

Leases [Abstract]

Minimum payments for operating leases having initial non-cancelable terms in excess of one year

At December 31, 2018, minimum payments for operating leases having initial non-cancelable terms in excess of one year were as follows: 

(Millions of dollars)
2019	$	8
2020	6
2021	4
2022	2
2023	2
Thereafter	2
Total	$	24