Commitments and Contingencies Contractual Commitments, Excluding Open Orders for Purchases that Support Normal Operations (Detail) - USD ($) $ in Millions		Dec. 31, 2015		Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Total commitments
Year Ended December 31, 2016		$ 6,466
Year Ended December 31, 2017		5,728
Year Ended December 31, 2018		3,146
Year Ended December 31, 2019		2,748
Year Ended December 31, 2020		1,308
Thereafter		14,220
Total		33,616
Capital leases, including interest
Year Ended December 31, 2016		3,128
Year Ended December 31, 2017		2,521
Year Ended December 31, 2018		1,277
Year Ended December 31, 2019		304
Year Ended December 31, 2020		139
Thereafter		83
Total		7,452
Operating leases
Year Ended December 31, 2016		1,181
Year Ended December 31, 2017		897
Year Ended December 31, 2018		800
Year Ended December 31, 2019		698
Year Ended December 31, 2020		616
Thereafter		2,325
Total		6,517
Unconditional purchase obligations
Year Ended December 31, 2016	[1]	614
Year Ended December 31, 2017	[1]	547
Year Ended December 31, 2018	[1]	399
Year Ended December 31, 2019	[1]	166
Year Ended December 31, 2020	[1]	43
Thereafter	[1]	13
Total	[1]	1,782
Other commitments
Year Ended December 31, 2016	[2],[3]	851
Year Ended December 31, 2017	[2],[3]	273
Year Ended December 31, 2018	[2],[3]	188
Year Ended December 31, 2019	[2],[3]	132
Year Ended December 31, 2020	[2],[3]	86
Thereafter	[2],[3]	1,112
Total	[2],[3]	2,642
Excluded tax contingencies		1,181	[4]	$ 710	$ 407	$ 294
Debt principal and interest
Total commitments
Year Ended December 31, 2016		526
Year Ended December 31, 2017		1,322
Year Ended December 31, 2018		310
Year Ended December 31, 2019		1,272
Year Ended December 31, 2020		246
Thereafter		9,157
Total		12,833
Finance lease obligations, including interest
Total commitments
Year Ended December 31, 2016		166
Year Ended December 31, 2017		168
Year Ended December 31, 2018		172
Year Ended December 31, 2019		176
Year Ended December 31, 2020		178
Thereafter		1,530
Total		$ 2,390

[1] 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.

[2] Excludes $1.2 billion of tax contingencies for which we cannot make a reasonably reliable estimate of the amount and period of payment, if any.

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

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