The following summarizes our principal contractual commitments, excluding open orders for purchases that support normal operations, as of September 30, 2016 (in millions):



	Three Months Ended December 31,		Year Ended December 31,
	2016		2017		2018		2019		2020		Thereafter		Total
Debt principal and interest	$	164	$	1,324	$	311	$	1,273	$	246	$	9,157	$	12,475
Capital lease obligations, including interest (1)	739		3,693		2,434		1,046		326		240		8,478
Finance lease obligations, including interest (2)	56		228		233		237		241		2,203		3,198
Operating leases	347		1,259		1,159		1,028		961		4,284		9,038
Unconditional purchase obligations (3)	162		690		555		297		140		56		1,900
Other commitments (4) (5)	595		682		527		426		326		2,216		4,772
Total commitments	$	2,063	$	7,876	$	5,219	$	4,307	$	2,240	$	18,156	$	39,861

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(1)	Excluding interest, current capital lease obligations of $3.7 billion and $3.0 billion are recorded within “Accrued expenses and other” as of September 30, 2016, and December 31, 2015, and $4.5 billion and $4.2 billion are recorded within “Other long-term liabilities” as of September 30, 2016, and December 31, 2015.


(2)	Excluding interest, current finance lease obligations of $135 million and $99 million are recorded within “Accrued expenses and other” as of September 30, 2016, and December 31, 2015, and $2.4 billion and $1.7 billion are recorded within “Other long-term liabilities” as of September 30, 2016, and December 31, 2015.

(3)

Includes unconditional purchase obligations related to long-term agreements to acquire and license digital media content that are not reflected on the consolidated balance sheets. For those 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 $1.7 billion of accrued tax contingencies for which we cannot make a reasonably reliable estimate of the amount and period of payment, if any.