Exhibit 12.1

Ratio of Earnings to Fixed Charges and Ratio of Earnings to Combined Fixed Charges and Preferred Stock Dividends

The following table sets forth the calculation of our ratio of earnings to fixed charges and our ratio of earnings to combined fixed charges and preferred stock dividends for the periods shown (in millions):

	Three Months Ended		Fiscal Year
	March 31, 2018		2017		2016		2015		2014			2013
Ratio of earnings to fixed charges:
Fixed charges 1	$	206	$	524	$	394	$	330	$	372		$	536
Net (loss) income available to common shareholders before provision for income taxes	415		733		595		187		(256		)	1,245
Earnings	$	621	$	1,257	$	989	$	517	$	116		$	1,781
Ratio of earnings to fixed charges	3.01		2.40		2.51		1.57		0.31			3.32
Ratio of earnings to combined fixed charges and preferred stock dividends:
Fixed charges 1	$	206	$	524	$	394	$	330	$	372		$	536
Preferred stock dividends	9		32		28		28		23			14
Combined fixed charges and preferred stock dividends	215		556		422		358		395			550
Net (loss) income available to common shareholders before provision for income taxes	415		733		595		187		(256		)	1,245
Earnings	$	630	$	1,289	$	1,017	$	545	$	139		$	1,795
Ratio of earnings to combined fixed charges and preferred stock dividends	2.93		2.32		2.41		1.52		0.35			3.26

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1. Fixed charges consist of interest expense, as defined under U.S. generally accepted accounting principles, on all indebtedness.