Earnings per Common Share - Schedule of EPS (Details) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Earnings Per Share [Abstract]
Weighted-average shares - basic (in shares)	464,768	465,068	465,057	448,455
Dilution effect of stock appreciation rights and stock awards at end of period (in shares)	1,977	0	1,695	0
Weighted-average shares - diluted (in shares)	466,745	465,068	466,752	448,455