Principal Contractual Commitments Excluding Open Orders for Inventory Purchases That Support Normal Operations (Detail) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013
Long-term Purchase Commitment [Line Items]
Nine Months Ended December 31, 2013	$ 2,066
Year Ended December 31, 2014	1,876
Year Ended December 31, 2015	2,020
Year Ended December 31, 2016	692
Year Ended December 31, 2017	1,564
Thereafter	4,561
Total	12,779
Debt principal and interest
Long-term Purchase Commitment [Line Items]
Nine Months Ended December 31, 2013	541
Year Ended December 31, 2014	253
Year Ended December 31, 2015	866
Year Ended December 31, 2016	43
Year Ended December 31, 2017	1,043
Thereafter	1,406
Total	4,152
Long-term capital lease obligations
Long-term Purchase Commitment [Line Items]
Nine Months Ended December 31, 2013	483
Year Ended December 31, 2014	498
Year Ended December 31, 2015	359
Year Ended December 31, 2016	71
Year Ended December 31, 2017	22
Thereafter	91
Total	1,524
Financing lease obligations, including interest
Long-term Purchase Commitment [Line Items]
Nine Months Ended December 31, 2013	1
Year Ended December 31, 2014	1
Year Ended December 31, 2015	1
Year Ended December 31, 2016	1
Year Ended December 31, 2017	1
Thereafter	9
Total	14
Operating leases
Long-term Purchase Commitment [Line Items]
Nine Months Ended December 31, 2013	447
Year Ended December 31, 2014	577
Year Ended December 31, 2015	517
Year Ended December 31, 2016	465
Year Ended December 31, 2017	405
Thereafter	2,112
Total	4,523
Unconditional Purchase Obligation
Long-term Purchase Commitment [Line Items]
Nine Months Ended December 31, 2013	237	[1]
Year Ended December 31, 2014	299	[1]
Year Ended December 31, 2015	135	[1]
Year Ended December 31, 2016	10	[1]
Year Ended December 31, 2017	1	[1]
Total	682	[1]
Other commitments
Long-term Purchase Commitment [Line Items]
Nine Months Ended December 31, 2013	357	[2],[3]
Year Ended December 31, 2014	248	[2],[3]
Year Ended December 31, 2015	142	[2],[3]
Year Ended December 31, 2016	102	[2],[3]
Year Ended December 31, 2017	92	[2],[3]
Thereafter	943	[2],[3]
Total	$ 1,884	[2],[3]

[1] Includes unconditional purchase obligations related to agreements to acquire and license digital video content that represent long-term liabilities or that are not reflected on the consolidated balance sheets.

[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 $314 million of tax contingencies for which we cannot make a reasonably reliable estimate of the amount and period of payment, if any.