Capital Stock and Share-Based Compensation - Restricted Stock Units Issued and Outstanding (Parenthetical) (Details) - 2010 Incentive Award Plan - Restricted Stock Units (RSUs)	Dec. 31, 2018 $ / shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock fair value per share	$ 63.00
Restricted stock units purchase price per share	$ 0

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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