Equity, Changes in Accumulated Other Comprehensive Income (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Changes in Accumulated Other Comprehensive Income, By Component
Beginning balance, accumulated other comprehensive income (loss), net of tax			$ 350
Net other comprehensive income (loss)	149	(61)	76	(48)
Separation of retail business			0	(499)
Ending balance, accumulated other comprehensive income (loss), net of tax	426		426
Accumulated Other Comprehensive Income (Loss) [Member]
Changes in Accumulated Other Comprehensive Income, By Component
Beginning balance, accumulated other comprehensive income (loss), net of tax			350	108
Other comprehensive income (loss) before reclassifications			78	(61)
Amounts reclassified from accumulated other comprehensive income (loss)			(2)	13
Net other comprehensive income (loss)			76	(48)
Separation of retail business				(159)
Ending balance, accumulated other comprehensive income (loss), net of tax	426	(99)	426	(99)
Foreign Currency Translation Adjustment [Member]
Changes in Accumulated Other Comprehensive Income, By Component
Beginning balance, accumulated other comprehensive income (loss), net of tax			408	665
Other comprehensive income (loss) before reclassifications			76	(268)
Amounts reclassified from accumulated other comprehensive income (loss)			0	0
Net other comprehensive income (loss)			76	(268)
Separation of retail business				(159)
Ending balance, accumulated other comprehensive income (loss), net of tax	484	238	484	238
Defined Benefit Plans Items [Member]
Changes in Accumulated Other Comprehensive Income, By Component
Beginning balance, accumulated other comprehensive income (loss), net of tax			(58)	(558)
Other comprehensive income (loss) before reclassifications			0	213
Amounts reclassified from accumulated other comprehensive income (loss)			0	10
Net other comprehensive income (loss)			0	223
Separation of retail business				0
Ending balance, accumulated other comprehensive income (loss), net of tax	(58)	(335)	(58)	(335)
Gains (Losses) on Cash Flow Hedges [Member]
Changes in Accumulated Other Comprehensive Income, By Component
Beginning balance, accumulated other comprehensive income (loss), net of tax			0	1
Other comprehensive income (loss) before reclassifications			2	(6)
Amounts reclassified from accumulated other comprehensive income (loss)			(2)	3
Net other comprehensive income (loss)			0	(3)
Separation of retail business				0
Ending balance, accumulated other comprehensive income (loss), net of tax	$ 0	$ (2)	$ 0	$ (2)