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Stock Based Compensation - Summary of Stock Option Activity (Parenthetical) (Details) - 2010 SIP and 2019 SIP - shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Shares not yet awarded Granted	1,014,269	1,123,408	1,151,578
Potential Payout	501,384	576,886	641,652
Targeted payout	100.00%	100.00%	100.00%
Maximum
Performance of final target percentage	200.00%	200.00%	200.00%
Minimum
Performance of final target percentage	0.00%	0.00%	0.00%

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- Definition

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- Definition

Share-based compensation arrangement by share-based payment award, equity instruments other than options, grants shares potential payout.

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- Definition

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Share-based compensation arrangement by share-based payment award, equity instruments other than options, targeted payout percentage.

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