The following summarizes our principal contractual commitments, excluding open orders for purchases that support normal operations, as of June 30, 2013 (in millions):


	Six Months Ended December 31,		Year Ended December 31,
	2013		2014		2015		2016		2017		Thereafter		Total
Operating and capital commitments:
Debt principal and interest	$	271	$	534	$	867	$	43	$	1,043	$	1,406	$	4,164
Capital leases, including interest		380		628		509		136		38		98		1,789
Financing lease obligations, including interest		—		1		1		1		1		10		14
Operating leases		311		600		543		499		440		2,254		4,647
Unconditional purchase obligations (1)		167		471		251		39		31		20		979
Other commitments (2) (3)		305		348		265		156		137		1,603		2,814

Total commitments	$	1,434	$	2,582	$	2,436	$	874	$	1,690	$	5,391	$	14,407

(1)	Includes unconditional purchase obligations related to agreements to acquire and license digital video content that represent long-term liabilities or that are not reflected on the consolidated balance sheets.

(2)	Includes the estimated timing and amounts of payments for rent and tenant improvements associated with build-to-suit lease arrangements that have not been placed in service.

(3)	Excludes $317 million of tax contingencies for which we cannot make a reasonably reliable estimate of the amount and period of payment, if any.