The following summarizes our principal contractual commitments, excluding open orders for inventory purchases that support normal operations, as of December 31, 2011:


	Year Ended December 31,
	2012		2013		2014		2015		2016		Thereafter		Total
	(in millions)
Operating and capital commitments:
Debt principal and interest	$	147	$	265	$	—	$	—	$	—	$	—	$	412
Capital leases, including interest		397		316		150		58		29		74		1,024
Financing lease obligations, including interest (1)		49		51		54		55		56		598		863
Operating leases		380		420		407		354		300		1,232		3,093
Unconditional purchase obligations		117		84		66		48		23		—		338
Other commitments (2) (3) (4)		325		127		72		66		61		664		1,315

Total commitments	$	1,415	$	1,263	$	749	$	581	$	469	$	2,568	$	7,045

(1)	Relates to the 1,370,000 square feet of occupied corporate office space under build-to-suit lease arrangements.

(2)	Includes contractual obligations with minimum firm commitments recorded as liabilities on the consolidated balance sheets.

(3)

Includes the estimated timing and payments for rent, operating expenses, and tenant improvements associated with approximately 330,000 square feet of corporate office space currently being developed under build-to-suit leases and which we anticipate occupying in 2012 to 2013. The amount of space available and our financial and other obligations under the lease agreements are affected by various factors, including government approvals and permits, interest rates, development costs and other expenses and our exercise of certain rights under the lease agreements. See “Note 3—Fixed Assets” for a discussion of these leases.

(4)	Excludes $229 million of tax contingencies for which we cannot make a reasonably reliable estimate of the amount and period of payment, if any.