Stock Based Compensation RSU Narrative (Details) shares in Millions	Dec. 31, 2020 years shares
Number of shares authorized for stock based employee and non-employee compensation plans | shares	10.3
Employee [Member]
RSUs, vesting period (in years)	3
Director [Member]
RSUs, vesting period (in years)	1
RSUs, annual vesting percentage	100.00%
RSUs, contractual lives (in years)	1