Proposed Acquisition of Elpida Memories, Inc. (Details) Share data in Millions, unless otherwise specified	6 Months Ended		8 Months Ended			3 Months Ended	6 Months Ended	8 Months Ended														18 Months Ended		12 Months Ended		24 Months Ended		1 Months Ended				6 Months Ended										18 Months Ended		1 Months Ended
	Feb. 28, 2013 USD ($)	Mar. 01, 2012 USD ($)	Feb. 28, 2013 Elpida Company [Member] USD ($) mm	Jul. 31, 2012 Elpida Company [Member] USD ($)	Jul. 31, 2012 Elpida Company [Member] JPY (¥)	Feb. 28, 2013 Elpida Company [Member] Not Designated as Hedging Instrument [Member] Other Non-Operating Income Expense Net [Member] USD ($)	Feb. 28, 2013 Elpida Company [Member] Not Designated as Hedging Instrument [Member] Other Non-Operating Income Expense Net [Member] USD ($)	Feb. 28, 2013 Elpida Company [Member] Not Designated as Hedging Instrument [Member] Other Non-Operating Income Expense Net [Member] USD ($)	Feb. 28, 2013 Elpida Company [Member] Not Designated as Hedging Instrument [Member] Call Options Purchased [Member] JPY (¥)	Feb. 28, 2013 Elpida Company [Member] Not Designated as Hedging Instrument [Member] Put Options Written [Member] JPY (¥)	Feb. 28, 2013 Elpida Company [Member] Not Designated as Hedging Instrument [Member] Call Options Written [Member] JPY (¥)	Feb. 28, 2013 Elpida Company [Member] Payment Guarantee [Member] Capital Expenditure [Member] EUR (€)	Feb. 28, 2013 Elpida Company [Member] Payment Guarantee [Member] Capital Expenditure [Member] JPY (¥)	Feb. 28, 2013 Elpida Company [Member] Payment Guarantee [Member] Working Capital Credit Facility [Member] USD ($)	Feb. 28, 2013 Elpida Company [Member] Payment Guarantee [Member] Working Capital Credit Facility [Member] JPY (¥)	Feb. 28, 2013 Elpida Company [Member] Yen	Feb. 28, 2013 Elpida Company [Member] Yen Not Designated as Hedging Instrument [Member] Call Options Purchased [Member]	Feb. 28, 2013 Elpida Company [Member] Yen Not Designated as Hedging Instrument [Member] Put Options Written [Member]	Feb. 28, 2013 Elpida Company [Member] Yen Not Designated as Hedging Instrument [Member] Call Options Written [Member]	Feb. 28, 2013 Elpida Company [Member] Yen Payment Guarantee [Member] Capital Expenditure [Member] USD ($)	Feb. 28, 2013 Elpida Company [Member] Euro Payment Guarantee [Member] Capital Expenditure [Member] USD ($)	Jan. 02, 2014 Elpida Company [Member] Scenario, Forecast [Member] USD ($) decimal	Jan. 02, 2014 Elpida Company [Member] Scenario, Forecast [Member] JPY (¥)	Jun. 30, 2013 Elpida Company [Member] Scenario, Forecast [Member] Capital Expenditure [Member] USD ($)	Jun. 30, 2013 Elpida Company [Member] Scenario, Forecast [Member] Capital Expenditure [Member] JPY (¥)	Jun. 30, 2014 Elpida Company [Member] Scenario, Forecast [Member] Capital Expenditure [Member] USD ($)	Jun. 30, 2014 Elpida Company [Member] Scenario, Forecast [Member] Capital Expenditure [Member] JPY (¥)	Mar. 26, 2013 Elpida Company [Member] Scenario, Forecast [Member] Derivative [Member] Not Designated as Hedging Instrument [Member] USD ($)	Mar. 26, 2013 Elpida Company [Member] Scenario, Forecast [Member] Derivative [Member] Not Designated as Hedging Instrument [Member] Other Non-Operating Income Expense Net [Member] USD ($)	Mar. 26, 2013 Elpida Company [Member] Scenario, Forecast [Member] Derivative [Member] Not Designated as Hedging Instrument [Member] Forward contracts [Member] JPY (¥)	Mar. 26, 2013 Elpida Company [Member] Scenario, Forecast [Member] Derivative [Member] Not Designated as Hedging Instrument [Member] Purchased Put Option [Member] JPY (¥)	Jun. 30, 2013 Elpida Company [Member] Scenario, Forecast [Member] Payment Guarantee [Member] Working Capital Credit Facility [Member] USD ($)	Jun. 30, 2013 Elpida Company [Member] Scenario, Forecast [Member] Payment Guarantee [Member] Working Capital Credit Facility [Member] JPY (¥)	Mar. 26, 2013 Elpida Company [Member] Scenario, Forecast [Member] Yen Derivative [Member] Not Designated as Hedging Instrument [Member] Forward contracts [Member]	Mar. 26, 2013 Elpida Company [Member] Scenario, Forecast [Member] Yen Derivative [Member] Not Designated as Hedging Instrument [Member] Purchased Put Option [Member]	Feb. 28, 2013 Elpida Company [Member] Scenario, Plan [Member] USD ($)	Feb. 28, 2013 Elpida Company [Member] Scenario, Plan [Member] JPY (¥)	Feb. 28, 2013 Rexchip Electronics Corporation [Member] mm	Feb. 28, 2013 Rexchip Electronics Corporation [Member] Not Designated as Hedging Instrument [Member] Call Options Purchased [Member] TWD	Feb. 28, 2013 Rexchip Electronics Corporation [Member] New Taiwan dollar	Feb. 28, 2013 Rexchip Electronics Corporation [Member] New Taiwan dollar Not Designated as Hedging Instrument [Member] Call Options Purchased [Member]	Jan. 02, 2014 Rexchip Electronics Corporation [Member] Scenario, Forecast [Member] USD ($)	Jan. 02, 2014 Rexchip Electronics Corporation [Member] Scenario, Forecast [Member] TWD	Apr. 02, 2013 Rexchip Electronics Corporation [Member] Scenario, Forecast [Member] Derivative [Member] Not Designated as Hedging Instrument [Member] Call Options Purchased [Member] USD ($)	Feb. 28, 2013 Elpida Memory, Inc. [Member]	Feb. 28, 2013 Akita Elpida Memory, Inc. [Member]
Business Acquisition [Line Items]
Percentage of equity acquired																																										24.00%	24.00%
Elpida's ownership percentage in Rexchip Electronics Corp																						65.00%	65.00%
Ownership percentage after stock transactions during period (in hundredths)																						100.00%	100.00%																			89.00%	89.00%
Diameter of Wafer Used in Production (in millimeters)			300																																			300
Elpida Sponsor Agreement [Abstract]
Reorganization Plan Payments, Total Cash Payments																						$ 2,170,000,000	¥ 200,000,000,000
Foreign Currency Exchange Rate, Translation																92																								30
Business Acquisition Cost Of Acquired Entity Cash Paid At Closing																						650,000,000	60,000,000,000
Funds deposited in escrow account				20,000,000	1,800,000,000
Initial Installmet Reorganization Payment																							60,000,000,000
Reorganization Plan Due Date of Inital Installment Payment																						3 months	3 months
Reorganization Plan Future Payments																						1,520,000,000	140,000,000,000
Reorganization Plan Number of Annual Installment Payments																						6	6
Reorganization payments, by maturity [Abstract]
Reorganization Payment Year Two																																				217,000,000	20,000,000,000
Reorganization Payment Year Three																																				217,000,000	20,000,000,000
Reorganization Payment Year Four																																				217,000,000	20,000,000,000
Reorganization Payment Year Five																																				217,000,000	20,000,000,000
Reorganization Payment Year Six																																				325,000,000	30,000,000,000
Reorganization Payment Year Seven																																				325,000,000	30,000,000,000
Maximum exposure to payment guarantee or direct financing for Elpida																								434,000,000	40,000,000,000	694,000,000	64,000,000,000					108,000,000	10,000,000,000
Maximum exposure to executed payment guarantees												29,000,000	6,000,000,000	87,000,000	8,000,000,000					65,000,000	38,000,000
Payment Guarantee Collateral in Rexchip Equity Holdings of the Borrower (in hundredths)			93.00%
Recovery rate of secured creditors																																													100.00%	100.00%
Recovery Rate of Unsecured Creditors																																													17.40%	19.00%
Rexchip Share Purchase Agreement [Abstract]
Business Combination, Step Acquisition, Shares of Common Stock Purchased																																										714	714
Percentage of equity acquired																																										24.00%	24.00%
Payments to Acquire Additional Interest in Subsidiaries																																										338,000,000	10,000,000,000
Foreign Currency Derivatives [Abstract]
Notional amount of call options purchased									200,000,000,000																														10,000,000,000
Weighted average strike price of call options purchased																	79.15																	91.00	94.24						29.21
Notional amount of foreign currency derivative sale contracts										100,000,000,000	100,000,000,000
Strike price of options sold																		83.32	75.57
Notional Amount of Foreign Currency Derivatives																														80,000,000,000	80,000,000,000
Cash paid on settlement of foreign currency options																												191,000,000																3,000,000
Reduction of amount to be paid to the secured and unsecured creditors of the Elpida Companies due to the weakening of the yen			338,000,000
Derivative Instruments, Gain (Loss) Recognized in Income	$ 173,000,000	$ 18,000,000				$ 114,000,000	$ 176,000,000	$ 168,000,000																					$ 23,000,000