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Stock Compensation - Option activity (Details) - Stock Options - $ / shares	1 Months Ended	6 Months Ended	9 Months Ended
	Jul. 31, 2016	Jun. 30, 2016	Sep. 30, 2021
Shares Subject to Outstanding Options, Shares
Outstanding at the beginning of the period (in shares)			12,115,288
Options granted (in shares)			2,419,885
Options exercised (in shares)			(555,102)
Options cancelled (in shares)			(855,329)
Outstanding at the end of the period (in shares)			13,124,742
Shares Subject to Outstanding Options, Weighted Average Exercise Price
Outstanding at the beginning of the period (in dollars per share)			$ 88.31
Options granted (in dollars per share)			85.80
Options exercised (in dollars per share)			67.63
Options cancelled (in dollars per share)			91.81
Outstanding at the end of the period (in dollars per share)			$ 88.49
Termination period	10 years	7 years
Vesting period	4 years	3 years
Tranche One
Shares Subject to Outstanding Options, Weighted Average Exercise Price
Vesting period	1 year	1 year
Vesting Percentage	25.00%	33.00%
Tranche Two
Shares Subject to Outstanding Options, Weighted Average Exercise Price
Vesting period	36 months	24 months

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Net number of share options (or share units) granted during the period.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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