CONSOLIDATED STATEMENTS OF SHAREOWNER'S EQUITY - USD ($) $ in Thousands	Total	Preferred Stock	Common Stock	Additional Paid-In- Capital	Retained Earnings (Deficit)	Accumulated Other Comprehensive Income (Loss)
Beginning balance at Dec. 31, 2016	$ 6,739,674	$ 2	$ 5,000	$ 7,422,407	$ (32,695)	$ (655,040)
Increase (decrease) in shareowner's equity
Net income	1,182,417				1,182,417
Other comprehensive income (loss)	705,194					705,194
Comprehensive income (loss)	1,887,611
Dividends paid to the parent company	(259,089)				(259,089)
Return of capital	(43,911)			(43,911)
Ending balance at Dec. 31, 2017	8,324,285	2	5,000	7,378,496	916,971	23,816
Increase (decrease) in shareowner's equity
Net income	193,927				193,927
Other comprehensive income (loss)	(1,417,480)					(1,417,480)
Comprehensive income (loss)	(1,223,553)
Prior period adjustment	32,041			32,041
Ending balance at Dec. 31, 2018	7,042,788	2	5,000	7,410,537	1,031,465	(1,404,216)
Increase (decrease) in shareowner's equity
Net income	552,984				552,984
Other comprehensive income (loss)	2,811,858					2,811,858
Comprehensive income (loss)	3,364,842
Capital contributions from parent	850,000			850,000
Ending balance at Dec. 31, 2019	$ 11,206,826	$ 2	$ 5,000	$ 8,260,537	$ 1,533,645	$ 1,407,642