Equity, Changes in Accumulated Other Comprehensive Income (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Changes in Accumulated Other Comprehensive Income by Component, Net of Tax
Accumulated other comprehensive income (loss), net of tax	$ 108
Other comprehensive income (loss), net of tax	401	12	(292)
Separation of retail business	(479)
Accumulated other comprehensive income (loss), net of tax	350	108
Accumulated Other Comprehensive Income (Loss) [Member]
Changes in Accumulated Other Comprehensive Income by Component, Net of Tax
Accumulated other comprehensive income (loss), net of tax	108	96	388
Other comprehensive income (loss), before reclassifications, net of tax	383
Amounts reclassified from accumulated other comprehensive income (loss)	18
Other comprehensive income (loss), net of tax	401	12	(292)
Separation of retail business	(159)
Accumulated other comprehensive income (loss), net of tax	350	108	96
Accumulated Translation Adjustment [Member]
Changes in Accumulated Other Comprehensive Income by Component, Net of Tax
Accumulated other comprehensive income (loss), net of tax	665	501	623
Other comprehensive income (loss), before reclassifications, net of tax	(98)
Amounts reclassified from accumulated other comprehensive income (loss)	0
Other comprehensive income (loss), net of tax	(98)	164	(122)
Separation of retail business	(159)
Accumulated other comprehensive income (loss), net of tax	408	665	501
Accumulated Defined Benefit Plans Adjustment [Member]
Changes in Accumulated Other Comprehensive Income by Component, Net of Tax
Accumulated other comprehensive income (loss), net of tax	(558)	(424)	(235)
Other comprehensive income (loss), before reclassifications, net of tax	483
Amounts reclassified from accumulated other comprehensive income (loss)	17
Other comprehensive income (loss), net of tax	500	(134)	(189)
Separation of retail business	0
Accumulated other comprehensive income (loss), net of tax	(58)	(558)	(424)
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Changes in Accumulated Other Comprehensive Income by Component, Net of Tax
Accumulated other comprehensive income (loss), net of tax	1	19	0
Other comprehensive income (loss), before reclassifications, net of tax	(2)
Amounts reclassified from accumulated other comprehensive income (loss)	1
Other comprehensive income (loss), net of tax	(1)	(18)	19
Separation of retail business	0
Accumulated other comprehensive income (loss), net of tax	$ 0	$ 1	$ 19