Net Income Per Common Share (Tables)

12 Months Ended

Dec. 31, 2018

Earnings Per Share [Abstract]

Reconciliation of Net Income/(Loss) to Net Income/(Loss) Available to Common Shareholders

	Year Ended December 31
(Dollars and shares in millions, except per share data)	2018			2017			2016
Net income		$2,775			$2,273			$1,878
Less:
Preferred stock dividends	(107		)	(94		)	(66		)
Dividends and undistributed earnings allocated to unvested common share awards	—			—			(1		)
Net income available to common shareholders		$2,668			$2,179			$1,811
Average common shares outstanding - basic	460.9			481.3			498.6
Add dilutive securities:
RSUs	2.9			3.0			2.9
Common stock warrants, options, and restricted stock	1.2			2.7			2.0
Average common shares outstanding - diluted	465.0			487.0			503.5
Net income per average common share - diluted		$5.74			$4.47			$3.60
Net income per average common share - basic	5.79			4.53			3.63