Commitments and Contingencies - Principal Contractual Commitments Excluding Open Orders for Inventory Purchases That Support Normal Operations (Detail) (USD $) In Millions, unless otherwise specified	Jun. 30, 2014
Long-term Purchase Commitment [Line Items]
Six Months Ended December 31, 2014	$ 2,574
Year Ended December 31, 2015	4,887
Year Ended December 31, 2016	2,076
Year Ended December 31, 2017	2,336
Year Ended December 31, 2018	982
Thereafter	6,006
Total	18,861
Operating leases
Six Months Ended December 31, 2014	423
Year Ended December 31, 2015	752
Year Ended December 31, 2016	714
Year Ended December 31, 2017	636
Year Ended December 31, 2018	563
Thereafter	2,472
Total	5,560
Unconditional purchase obligations
Six Months Ended December 31, 2014	304	[1]
Year Ended December 31, 2015	517	[1]
Year Ended December 31, 2016	250	[1]
Year Ended December 31, 2017	214	[1]
Year Ended December 31, 2018	61	[1]
Thereafter	47	[1]
Total	1,393	[1]
Other commitments
Six Months Ended December 31, 2014	525	[2],[3]
Year Ended December 31, 2015	583	[2],[3]
Year Ended December 31, 2016	269	[2],[3]
Year Ended December 31, 2017	149	[2],[3]
Year Ended December 31, 2018	119	[2],[3]
Thereafter	1,325	[2],[3]
Total	2,970	[2],[3]
Debt principal and interest
Long-term Purchase Commitment [Line Items]
Six Months Ended December 31, 2014	276
Year Ended December 31, 2015	1,485
Year Ended December 31, 2016	81
Year Ended December 31, 2017	1,081
Year Ended December 31, 2018	69
Thereafter	1,375
Total	4,367
Capital leases, including interest
Long-term Purchase Commitment [Line Items]
Six Months Ended December 31, 2014	1,012
Year Ended December 31, 2015	1,482
Year Ended December 31, 2016	693
Year Ended December 31, 2017	186
Year Ended December 31, 2018	98
Thereafter	129
Total	3,600
Financing lease obligations, including interest
Long-term Purchase Commitment [Line Items]
Six Months Ended December 31, 2014	34
Year Ended December 31, 2015	68
Year Ended December 31, 2016	69
Year Ended December 31, 2017	70
Year Ended December 31, 2018	72
Thereafter	658
Total	$ 971

[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 what the total obligation may be 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 $590 million 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 content liabilities associated with long-term digital content assets with initial terms greater than one year.