Long-Term Debt (Tables)

12 Months Ended

Dec. 31, 2017

Long-term Debt, Unclassified [Abstract]

Long-term debt

Long-term debt outstanding as of December 31, was comprised of the following: 

(Millions of dollars)
	2017				2016
	Balance			Avg. Rate	Balance			Avg. Rate
Medium-term notes	$	21,362		2.5%	$	19,731		2.4%
Unamortized discount and debt issuance costs	(59		)		(64		)
Medium-term notes, net	21,303				19,667
Bank borrowings	803			5.0%	870			4.5%
Total	$	22,106			$	20,537

Aggregate amounts of maturities of long-term debt

Long-term debt outstanding as of December 31, 2017, matures as follows: 

(Millions of dollars)
2018	$	6,188
2019	5,681
2020	4,290
2021	1,740
2022	2,048
Thereafter	2,159
Total	$	22,106