CONSOLIDATED STATEMENTS OF SHAREOWNER'S EQUITY (USD $) In Thousands, unless otherwise specified	Preferred Stock	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss).	Total
Balance at Dec. 31, 2011	$ 2	$ 5,000	$ 1,361,734	$ 2,456,293	$ 1,054,321	$ 4,877,350
Increase (decrease) in shareowner's equity
Net income				308,536		308,536
Other comprehensive income (loss)					756,803	756,803
Total comprehensive income (loss)						1,065,339
Capital contributions			1,524			1,524
Dividends to the parent company				(257,000)		(257,000)
Balance at Dec. 31, 2012	2	5,000	1,363,258	2,507,829	1,811,124	5,687,213
Increase (decrease) in shareowner's equity
Net income				291,602		291,602
Other comprehensive income (loss)					(1,272,158)	(1,272,158)
Total comprehensive income (loss)						(980,556)
Capital contributions			70,000			70,000
Dividends to the parent company				(86,231)		(86,231)
Balance at Dec. 31, 2013	2	5,000	1,433,258	2,713,200	538,966	4,690,426
Increase (decrease) in shareowner's equity
Net income				491,951		491,951
Other comprehensive income (loss)					944,245	944,245
Total comprehensive income (loss)						1,436,196
Capital contributions			4,529			4,529
Dividends to the parent company				(300,000)		(300,000)
Balance at Dec. 31, 2014	$ 2	$ 5,000	$ 1,437,787	$ 2,905,151	$ 1,483,211	$ 5,831,151