The following summarizes our principal contractual commitments, excluding open orders for purchases that support normal operations and are generally cancellable, as of December 31, 2018 (in millions):



	Year Ended December 31,
	2019		2020		2021		2022		2023		Thereafter		Total
Debt principal and interest	$	2,277	$	2,161	$	1,861	$	2,078	$	1,781	$	30,013	$	40,171
Capital lease obligations, including interest (1)	7,807		5,742		2,725		704		473		501		17,952
Finance lease obligations, including interest (2)	628		640		652		664		675		5,117		8,376
Operating leases	3,127		3,070		2,775		2,473		2,195		13,026		26,666
Unconditional purchase obligations (3)	3,523		4,103		3,291		3,098		2,974		5,204		22,193
Other commitments (4) (5)	2,618		1,455		1,056		843		808		8,875		15,655
Total commitments	$	19,980	$	17,171	$	12,360	$	9,860	$	8,906	$	62,736	$	131,013

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(1)	Excluding interest, current capital lease obligations of $5.8 billion and $7.7 billion are recorded within “Accrued expenses and other” as of December 31, 2017 and 2018, and $8.4 billion and $9.6 billion are recorded within “Other long-term liabilities” as of December 31, 2017 and 2018.


(2)	Excluding interest, current finance lease obligations of $282 million and $411 million are recorded within “Accrued expenses and other” as of December 31, 2017 and 2018, and $4.7 billion and $6.6 billion are recorded within “Other long-term liabilities” as of December 31, 2017 and 2018.

(3)

Includes unconditional purchase obligations related to certain products offered in our Whole Foods Market stores and long-term agreements to acquire and license digital media content that are not reflected on the consolidated balance sheets. For those digital media content agreements with variable terms, we do not estimate the total obligation beyond any minimum quantities and/or pricing as of the reporting date. Purchase obligations associated with renewal provisions solely at the option of the content provider are included to the extent such commitments are fixed or a minimum amount is specified.


(4)	Includes the estimated timing and amounts of payments for rent and tenant improvements associated with build-to-suit lease arrangements and equipment lease arrangements that have not been placed in service and digital media content liabilities associated with long-term digital media content assets with initial terms greater than one year.


(5)	Excludes approximately $3.4 billion of accrued tax contingencies for which we cannot make a reasonably reliable estimate of the amount and period of payment, if any.