Stock Incentive Plan - Summary of Restricted Share Activity (Details) - RSUs - shares	6 Months Ended	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2019
RSUs
Outstanding at beginning of year (in shares)		593,994,000,000
Granted (in shares)	198,217,000,000	158,331
Shares issued (in shares)	(226,922,000,000)
Cancelled/Forfeited/Expired (in shares)	(63,826,000,000)
Outstanding at end of year (in shares)	593,994,000,000	501,463,000,000