Consolidated Statements of Changes in Equity (Unaudited) (USD $) In Millions, except Share data	Total	Common Stock	Retained Earnings	Non-controlling Interest	Accumulated Other Comprehensive Loss	Accumulated Defined Benefit Plans Adjustment [Member]	Accumulated Net Unrealized Investment Gain (Loss) [Member]
Stockholders' Equity, Including Portion Attributable to Noncontrolling interest at Dec. 31, 2013	$ 7,954	$ 3,907	$ 4,150	$ 33	$ (136)
Beginning Balance, shares at Dec. 31, 2013	177,087,230	177,087,000
Net Income	453		450	3
Dividends declared on common stock	(354)		(354)
Repurchase of common stock, Shares		(713,000)
Repurchase of common stock, Value	(52)	(52)
Other Comprehensive Income (Loss), Net of Tax	2					1	1
Stock-based compensation, distributions to noncontrolling interests and other, shares		619,000
Stock-based compensation, distributions to noncontrolling interests and other	23	41		(18)
Stockholders' Equity, Including Portion Attributable to Noncontrolling interest at Jun. 30, 2014	8,026	3,896	4,246	18	(134)
Ending Balance, shares at Jun. 30, 2014	176,993,343	176,993,000
Stockholders' Equity, Including Portion Attributable to Noncontrolling interest at Mar. 31, 2014
Net Income	126
Other Comprehensive Income (Loss), Net of Tax	3					1	1
Stockholders' Equity, Including Portion Attributable to Noncontrolling interest at Jun. 30, 2014	$ 8,026				$ (134)
Ending Balance, shares at Jun. 30, 2014	176,993,343