Commitments - Schedule of Future Minimum Lease Payments under Non-Cancelable Operating and Capital Leases (Detail) (USD $) In Thousands, unless otherwise specified	Jul. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
Future minimum lease payments under non-cancelable capital leases, Remaining six months of fiscal 2015	$ 19,206
Future minimum lease payments under non-cancelable capital leases, Fiscal 2016	88,493
Future minimum lease payments under non-cancelable capital leases, Fiscal 2017	99,806
Future minimum lease payments under non-cancelable capital leases, Fiscal 2018	107,878
Future minimum lease payments under non-cancelable capital leases, Fiscal 2019	112,506
Future minimum lease payments under non-cancelable capital leases, Thereafter	201,233
Future minimum lease payments under non-cancelable capital leases, Total	629,122
Less: amount representing interest	(84,493)
Present value of capital lease obligations	544,629
Future minimum lease payments under non-cancelable operating leases, Remaining six months of fiscal 2015	116,503
Future minimum lease payments under non-cancelable operating leases, Fiscal 2016	232,255
Future minimum lease payments under non-cancelable operating leases, Fiscal 2017	207,389
Future minimum lease payments under non-cancelable operating leases, Fiscal 2018	168,019
Future minimum lease payments under non-cancelable operating leases, Fiscal 2019	172,056
Future minimum lease payments under non-cancelable operating leases, Thereafter	1,218,423
Future minimum lease payments under non-cancelable operating leases, Total	2,114,645
Financing Obligation, Building in Progress-Leased Facility, Remaining six months of fiscal 2015	0
Financing Obligation, Building in Progress-Leased Facility, Fiscal 2016	1,777
Financing Obligation, Building in Progress-Leased Facility, Fiscal 2017	16,877
Financing Obligation, Building in Progress-Leased Facility, Fiscal 2018	21,107
Financing Obligation, Building in Progress-Leased Facility, Fiscal 2019	21,551
Financing Obligation, Building in Progress-Leased Facility, Thereafter	274,512
Financing Obligation, Building in Progress-Leased Facility	$ 335,824