Condensed Consolidated Statements of Shareholders' Equity - USD ($) shares in Millions, $ in Millions	Total	Common equities	Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Income	Treasury Stock
Beginning Balance at Dec. 31, 2014		$ 397	$ 1,214	$ 4,505	$ 1,744	$ (1,287)
Share-based awards		0	(11)			19
Share-based compensation			6
Other			1			1
Net Income	$ 128			128
Dividends declared				(76)
Other comprehensive income	(28)				(28)
Shares acquired - share repurchase authorization						0
Shares acquired - share-based compensation plans						(5)
Ending Balance at Mar. 31, 2015	6,608	$ 397	1,210	4,557	1,716	(1,272)
Beginning Balance (in shares) at Dec. 31, 2014		163.7
Share-based awards (in shares)		0.6
Shares acquired - share repurchase authorization (in shares)		0.0
Shares acquired - share-based compensation plans (in shares)		0.0
Other (in shares)		0.0
Ending Balance (in shares) at Mar. 31, 2015		164.3
Beginning Balance at Dec. 31, 2015	6,427	$ 397	1,232	4,762	1,344	(1,308)
Share-based awards		0	(10)			18
Share-based compensation			7
Other			1			1
Net Income	188			188
Dividends declared				(79)
Other comprehensive income	187				187
Shares acquired - share repurchase authorization						0
Shares acquired - share-based compensation plans						(5)
Ending Balance at Mar. 31, 2016	$ 6,735	$ 397	$ 1,230	$ 4,871	$ 1,531	$ (1,294)
Beginning Balance (in shares) at Dec. 31, 2015	198.3	163.9
Share-based awards (in shares)		0.5
Shares acquired - share repurchase authorization (in shares)		0.0
Shares acquired - share-based compensation plans (in shares)		0.0
Other (in shares)		0.0
Ending Balance (in shares) at Mar. 31, 2016	198.3	164.4