Earnings per common share (Tables)

9 Months Ended

Sep. 30, 2018

Earnings Per Share [Abstract]

Computations of Basic Earnings Per Common Share

The computations of basic earnings per common share follow:

	Three Months Ended September 30						Nine Months Ended September 30
	2018			2017			2018			2017
	(In thousands, except per share)
Income available to common shareholders:
Net income	$	526,091			355,923			1,371,861			1,085,903
Less: Preferred stock dividends (a)		(18,130	)		(18,130	)		(54,390	)		(54,604	)
Net income available to common equity		507,961			337,793			1,317,471			1,031,299
Less: Income attributable to unvested stock-based    compensation awards		(2,598	)		(1,992	)		(6,774	)		(6,288	)
Net income available to common shareholders	$	505,363			335,801			1,310,697			1,025,011
Weighted-average shares outstanding:
Common shares outstanding (including common stock    issuable) and unvested stock-based compensation awards		143,556			152,245			146,177			153,814
Less: Unvested stock-based compensation awards		(734	)		(898	)		(753	)		(948	)
Weighted-average shares outstanding		142,822			151,347			145,424			152,866
Basic earnings per common share	$	3.54			2.22			9.01			6.71

(a)Including impact of not as yet declared cumulative dividends.

Computations of Diluted Earnings Per Common Share

The computations of diluted earnings per common share follow:

	Three Months Ended September 30						Nine Months Ended September 30
	2018			2017			2018			2017
	(In thousands, except per share)
Net income available to common equity	$	507,961			337,793			1,317,471			1,031,299
Less: Income attributable to unvested stock-based    compensation awards		(2,596	)		(1,989	)		(6,768	)		(6,276	)
Net income available to common shareholders	$	505,365			335,804			1,310,703			1,025,023
Adjusted weighted-average shares outstanding:
Common and unvested stock-based compensation awards		143,556			152,245			146,177			153,814
Less: Unvested stock-based compensation awards		(734	)		(898	)		(753	)		(948	)
Plus: Incremental shares from assumed conversion of    stock-based compensation awards and warrants to    purchase common stock		154			344			181			427
Adjusted weighted-average shares outstanding		142,976			151,691			145,605			153,293
Diluted earnings per common share	$	3.53			2.21			9.00			6.69