Commitments and Contingencies - Principal Contractual Commitments Excluding Open Orders for Inventory Purchases That Support Normal Operations (Detail) (USD $) In Millions, unless otherwise specified	Mar. 31, 2014
Operating leases
Nine Months Ended December 31, 2014	$ 679
Year Ended December 31, 2015	697
Year Ended December 31, 2016	655
Year Ended December 31, 2017	582
Year Ended December 31, 2018	514
Thereafter	2,241
Total	5,368
Unconditional purchase obligations
Nine Months Ended December 31, 2014	412	[1]
Year Ended December 31, 2015	439	[1]
Year Ended December 31, 2016	137	[1]
Year Ended December 31, 2017	55	[1]
Year Ended December 31, 2018	51	[1]
Thereafter	50	[1]
Total	1,144	[1]
Other commitments
Nine Months Ended December 31, 2014	586	[2],[3]
Year Ended December 31, 2015	419	[2],[3]
Year Ended December 31, 2016	194	[2],[3]
Year Ended December 31, 2017	157	[2],[3]
Year Ended December 31, 2018	128	[2],[3]
Thereafter	1,369	[2],[3]
Total	2,853	[2],[3]
Long-term Purchase Commitments [Line Items]
Nine Months Ended December 31, 2014	3,053
Year Ended December 31, 2015	4,101
Year Ended December 31, 2016	1,654
Year Ended December 31, 2017	2,039
Year Ended December 31, 2018	870
Thereafter	5,652
Total	17,369
Debt principal and interest
Long-term Purchase Commitments [Line Items]
Nine Months Ended December 31, 2014	482
Year Ended December 31, 2015	1,252
Year Ended December 31, 2016	81
Year Ended December 31, 2017	1,081
Year Ended December 31, 2018	69
Thereafter	1,375
Total	4,340
Capital leases, including interest
Long-term Purchase Commitments [Line Items]
Nine Months Ended December 31, 2014	857
Year Ended December 31, 2015	1,246
Year Ended December 31, 2016	539
Year Ended December 31, 2017	115
Year Ended December 31, 2018	59
Thereafter	121
Total	2,937
Financing lease obligations, including interest
Long-term Purchase Commitments [Line Items]
Nine Months Ended December 31, 2014	37
Year Ended December 31, 2015	48
Year Ended December 31, 2016	48
Year Ended December 31, 2017	49
Year Ended December 31, 2018	49
Thereafter	496
Total	$ 727

[1] Includes unconditional purchase obligations related to agreements to acquire and license digital video content that represent long-term liabilities or 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] 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 $455 million of tax contingencies for which we cannot make a reasonably reliable estimate of the amount and period of payment, if any.