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Share-Based Compensation - Summary of Restricted Stock Units Transactions (Details) - Restricted Stock Units shares in Millions	12 Months Ended
	Dec. 31, 2019 $ / shares shares
Number of Shares
Nonvested shares of restricted stock units beginning (in shares) | shares	8.6
Granted (in shares) | shares	5.4
Achieved (in shares) | shares	0.2
Released (in shares) | shares	(4.8)
Canceled (in shares) | shares	(0.5)
Nonvested shares of restricted stock units ending (in shares) | shares	8.9
Weighted-Average Grant Date Fair Value
Nonvested shares of restricted stock units beginning (in dollars per share) | $ / shares	$ 16.59
Granted (in dollars per share) | $ / shares	21.64
Achieved (in dollars per share) | $ / shares	24.46
Released (in dollars per share) | $ / shares	14.41
Canceled (in dollars per share) | $ / shares	19.74
Nonvested shares of restricted stock units ending (in dollars per share) | $ / shares	$ 20.84

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Released in Period, Weighted Average Grant Date Fair Value

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Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Achieved in Period

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The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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