We have variable amount and term lending agreements and other notes receivable with Caterpillar. Under these agreements, we may borrow up to $2.75 billion from Caterpillar, and Caterpillar may borrow up to $2.14 billion from us. The variable amount lending agreements are in effect for indefinite periods of time and may be changed or terminated by either party with 30 days notice. The term lending agreements have remaining maturities ranging up to ten years. We extended a $2 billion committed credit facility to Caterpillar, which expires in February 2019. Under this agreement, we receive a fee from Caterpillar based on amounts drawn under the credit facility and a commitment fee for the undrawn amounts under the credit facility. Information concerning these agreements was as follows:



(Millions of dollars)
	2018		2017		2016
Payable to Caterpillar - borrowings as of December 31,	$	1,518	$	1,638	$	1,637
Payable to Caterpillar - other as of December 31,	$	83	$	85	$	49
Notes receivable as of December 31,	$	662	$	559	$	530
Other receivables from Caterpillar as of December 31,⁽²⁾	$	33	$	31	$	21
Interest expense	$	35	$	21	$	15
Interest income on Notes Receivable with Caterpillar⁽¹⁾	$	30	$	74	$	30
Fees on committed credit facility extended to Caterpillar⁽¹⁾	$	40	$	40	$	40

⁽¹⁾Included in Other revenues, net in the Consolidated Statements of Profit.

⁽²⁾Included in Other assets in the Consolidated Statements of Financial Position.

We have agreements with Caterpillar to purchase certain trade receivables at a discount. Information pertaining to these purchases was as follows:



(Millions of dollars)
	2018		2017		2016
Purchases made	$	42,961	$	34,667	$	28,631
Discounts earned	$	375	$	253	$	207
Purchased Receivables as of December 31,	$	4,691	$	3,461	$	2,431