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Development Expense, Facility Costs Research and Development Expense, Facility Costs Adjustments to reconcile net loss to net cash used in operating activities Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Noncash Item [Abstract] Award Timing Method Award Timing Method [Text Block] Net change in cash, cash equivalents, and restricted cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Juno Therapeutics, Inc. Juno Therapeutics, Inc. [Member] Juno Therapeutics, Inc. Net loss Net loss Net loss Net Income (Loss) Attributable to Parent Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Statement [Table] Statement [Table] Restatement Determination Date: Restatement Determination Date [Axis] Proceeds from research and development funding liability Proceeds From Research And Development Funding Liability Proceeds From Research And Development Funding Liability Net proceeds from stock option exercises Proceeds from Stock Options Exercised Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table] Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table] Interest income Investment Income, Interest Options vested and exercisable, end of period (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Axis] Laboratory equipment Laboratory Equipment [Member] Laboratory Equipment Revenue: Revenues [Abstract] Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Numerator: Net Income (Loss) Available to Common Stockholders, Diluted [Abstract]