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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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Amount after tax of increase (decrease) to equity or (increase) decrease to net assets, resulting from the cumulative effect adjustment of a new accounting principle applied in the period of adoption.

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Amount of paid and unpaid common stock dividends declared with the form of settlement in cash, stock and payment-in-kind (PIK).

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Amount after tax and reclassification adjustments of other comprehensive income (loss).

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Number, before forfeiture, of shares issued under share-based payment arrangement. Excludes employee stock ownership plan (ESOP).

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Value, before forfeiture, of shares issued under share-based payment arrangement. Excludes employee stock ownership plan (ESOP).

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Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

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CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Millions	Total	Common Shares [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Treasury Shares [Member]	Accumulated Other Comprehensive Income [Member]
Comprehensive income (loss):
Stockholders' Equity Attributable to Parent	$ 6,289	$ 3	$ 7,765	$ 10,348	$ (12,027)	$ 200
Balances (in shares) at Dec. 31, 2016		154,759,904
Balances at Dec. 31, 2016	6,289	$ 3	7,765	10,348	(12,027)	200
Comprehensive income (loss):
Net income	1,480			1,480
Other comprehensive income (loss), net of tax	29					29
Total comprehensive income (loss)	1,509
Dividends to shareholders	(502)			(502)
Repurchase of common shares	(1,675)				(1,675)
Repurchase of common shares (in shares)		(12,388,348)
Share-based compensation plans	374		320		54
Share-based compensation plans (in shares)		4,263,108
Balances (in shares) at Dec. 31, 2017		146,634,664
Comprehensive income (loss):
Stockholders' Equity Attributable to Parent	6,289	$ 3	7,765	10,348	(12,027)	200
Cumulative Effect of New Accounting Principle in Period of Adoption	(1)
Cumulative Effect of New Accounting Principle in Period of Adoption \| Cumulative effect of adoption of equity securities guidance	0			1		(1)
Stockholders' Equity Attributable to Parent	5,995	3	8,085	11,326	(13,648)	229
Balances at Dec. 31, 2017	5,995	$ 3	8,085	11,326	(13,648)	229
Comprehensive income (loss):
Net income	2,098			2,098
Other comprehensive income (loss), net of tax	(519)					(519)
Total comprehensive income (loss)	1,579
Dividends to shareholders	(516)			(516)
Repurchase of common shares	(1,705)				(1,705)
Repurchase of common shares (in shares)		(12,124,840)
Share-based compensation plans	235		175		60
Share-based compensation plans (in shares)		1,820,923
Balances (in shares) at Dec. 31, 2018		136,330,747
Comprehensive income (loss):
Stockholders' Equity Attributable to Parent	5,995	$ 3	8,085	11,326	(13,648)	229
Cumulative Effect of New Accounting Principle in Period of Adoption \| Cumulative effect of adoption of premium amort on purchased callable debt	(5)			(5)
Stockholders' Equity Attributable to Parent	5,588	3	8,260	12,909	(15,293)	(291)
Balances at Dec. 31, 2018	5,588	$ 3	8,260	12,909	(15,293)	(291)
Comprehensive income (loss):
Net income	1,893			1,893
Other comprehensive income (loss), net of tax	553					553
Total comprehensive income (loss)	2,446
Dividends to shareholders	(518)			(518)
Repurchase of common shares	(2,039)				(2,039)
Repurchase of common shares (in shares)		(14,396,367)
Share-based compensation plans	257		201		56
Share-based compensation plans (in shares)		2,004,854
Balances (in shares) at Dec. 31, 2019		123,939,234
Comprehensive income (loss):
Stockholders' Equity Attributable to Parent	5,588	$ 3	8,260	12,909	(15,293)	(291)
Stockholders' Equity Attributable to Parent	$ 5,729	$ 3	$ 8,461	$ 14,279	$ (17,276)	$ 262