Compensation Plans - Schedule of RSU Performance Condition Probability (Details) - Restricted Stock Units (RSUs) [Member] - Average adjusted return on equity targets - Probability of achieving performance condition	6 Months Ended
	Jun. 30, 2019
2019
Schedule of Share-based Payment Awards, Equity Instruments Other Than Options, Performance Condition [Line Items]
Award vesting percentage	68.00%
2018
Schedule of Share-based Payment Awards, Equity Instruments Other Than Options, Performance Condition [Line Items]
Award vesting percentage	50.00%
2017
Schedule of Share-based Payment Awards, Equity Instruments Other Than Options, Performance Condition [Line Items]
Award vesting percentage	75.00%