Earnings Per Common Share (Textual) (Details) - shares shares in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Earnings Per Share Textuals [Abstract]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	1	1	2
Incremental Common Shares Attributable to Dilutive Effect of Call Options and Warrants	4	4	4