Commitments and Contingencies Contractual Commitments, Exlcuding Open Orders for Purchases that Support Normal Operations (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Total commitments
Year Ended December 31, 2015	$ 6,297
Year Ended December 31, 2016	3,721
Year Ended December 31, 2017	3,706
Year Ended December 31, 2018	1,497
Year Ended December 31, 2019	2,157
Thereafter	13,748
Total	31,126
Capital leases, including interest
Year Ended December 31, 2015	2,060
Year Ended December 31, 2016	1,727
Year Ended December 31, 2017	1,030
Year Ended December 31, 2018	178
Year Ended December 31, 2019	89
Thereafter	98
Total	5,182
Operating leases
Year Ended December 31, 2015	868
Year Ended December 31, 2016	791
Year Ended December 31, 2017	728
Year Ended December 31, 2018	634
Year Ended December 31, 2019	549
Thereafter	2,343
Total	5,913
Unconditional purchase obligations
Year Ended December 31, 2015	489	[1]
Year Ended December 31, 2016	435	[1]
Year Ended December 31, 2017	351	[1]
Year Ended December 31, 2018	118	[1]
Year Ended December 31, 2019	38	[1]
Thereafter	3	[1]
Total	1,434	[1]
Other commitments
Year Ended December 31, 2015	928	[2],[3]
Year Ended December 31, 2016	333	[2],[3]
Year Ended December 31, 2017	160	[2],[3]
Year Ended December 31, 2018	140	[2],[3]
Year Ended December 31, 2019	90	[2],[3]
Thereafter	845	[2],[3]
Total	2,496	[2],[3]
Excluded tax contingencies	710	[4]	407	294	229
Debt principal and interest
Total commitments
Year Ended December 31, 2015	1,842
Year Ended December 31, 2016	323
Year Ended December 31, 2017	1,322
Year Ended December 31, 2018	310
Year Ended December 31, 2019	1,272
Thereafter	9,403
Total	14,472
Finance lease obligations, including interest
Total commitments
Year Ended December 31, 2015	110
Year Ended December 31, 2016	112
Year Ended December 31, 2017	115
Year Ended December 31, 2018	117
Year Ended December 31, 2019	119
Thereafter	1,056
Total	$ 1,629

[1] Includes unconditional purchase obligations related to long-term agreements to acquire and license digital 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.

[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 and media content liabilities associated with long-term media content assets with initial terms greater than one year.

[3] Excludes $710 million of tax contingencies for which we cannot make a reasonably reliable estimate of the amount and period of payment, if any.

[4] Deferred tax assets related to net operating losses and tax credits are presented net of tax contingencies.