CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS EQUITY Statement - USD ($) $ in Millions	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]	AOCI Attributable to Parent [Member]
Stockholders' Equity Attributable to Parent	$ 11,601	$ 1	$ 1,937	$ 7,952	$ (1,426)	$ 3,137
Net income	70			70
Other Comprehensive Income (Loss), Net of Tax	664
Dividends, Common Stock, Cash	(87)			(87)
Proceeds from issuance of common stock, net	481		481
Treasury Stock, Value, Acquired, Cost Method	(162)				(162)
Stock Issued During Period, Value, Treasury Stock Reissued	(2)		(5)	(22)	(25)
Stockholders' Equity, Other | Accounting Standards Update 2018-02	(12)			(12)
Stockholders' Equity Attributable to Parent	9,301	1	1,942	7,802	(1,574)	1,130
Net income	158			158
Other Comprehensive Income (Loss), Net of Tax	2,671
Dividends, Common Stock, Cash	(43)			(43)
Proceeds from issuance of common stock, net	481		481
Treasury Stock, Value, Acquired, Cost Method	(6)				(6)
Stock Issued During Period, Value, Treasury Stock Reissued	(9)		(10)	(16)	(17)
Stockholders' Equity Attributable to Parent	12,553	1	2,413	7,901	(1,563)	3,801
Stockholders' Equity Attributable to Parent	14,352	1	2,406	8,148	(1,562)	5,359
Net income	483			483
Other Comprehensive Income (Loss), Net of Tax	(1,318)
Dividends, Common Stock, Cash	(95)			(95)
Proceeds from issuance of common stock, net	0
Treasury Stock, Value, Acquired, Cost Method	(2)				(2)
Stock Issued During Period, Value, Treasury Stock Reissued	(24)		(24)	(5)	(5)
Stockholders' Equity, Other | Accounting Standards Update 2018-02	0			0
Stockholders' Equity Attributable to Parent	12,090	1	2,411	8,235	(1,559)	3,002
Net income	344			344
Other Comprehensive Income (Loss), Net of Tax	1,039
Dividends, Common Stock, Cash	(47)			(47)
Treasury Stock, Value, Acquired, Cost Method	(1)				(1)
Stock Issued During Period, Value, Treasury Stock Reissued	(19)		(19)	(1)	(1)
Stockholders' Equity Attributable to Parent	$ 13,444	$ 1	$ 2,430	$ 8,531	$ (1,559)	$ 4,041