Accumulated Other Comprehensive Income (AOCI) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Accumulated other comprehensive income (loss)
Balance of Accumulated Other Comprehensive Income (Loss) at Beginning of Period	$ (70)		$ (57)
Other comprehensive income (loss) before reclassifications	(493)		(605)
Amounts reclassified from AOCI	114		202
Other comprehensive income (loss), tax, portion attributable to parent	(20)		(9)
Balance of Accumulated Other Comprehensive Income (Loss) at End of period	(469)		(469)
Other Comprehensive Income (Loss), Net of Tax	(399)		(412)
Foreign Currency Translation Adjustment [Member]
Accumulated other comprehensive income (loss)
Balance of Accumulated Other Comprehensive Income (Loss) at Beginning of Period	270		269
Other comprehensive income (loss) before reclassifications	(462)		(462)
Amounts reclassified from AOCI	0		0
Other comprehensive income (loss), tax, portion attributable to parent	7		8
Balance of Accumulated Other Comprehensive Income (Loss) at End of period	(185)		(185)
Other Comprehensive Income (Loss), Net of Tax	(455)		(454)
Deferred Gain (Loss) On Hedging Activities [Member]
Accumulated other comprehensive income (loss)
Balance of Accumulated Other Comprehensive Income (Loss) at Beginning of Period	(12)	6	5	4
Other comprehensive income (loss) before reclassifications	(49)	13	(154)	15
Amounts reclassified from AOCI	108	3	186	3
Other comprehensive income (loss), tax, portion attributable to parent	(23)	(7)	(13)	(7)
Balance of Accumulated Other Comprehensive Income (Loss) at End of period	24	15	24	15
Other Comprehensive Income (Loss), Net of Tax	36		19
Pension Liability Adjustment [Member]
Accumulated other comprehensive income (loss)
Balance of Accumulated Other Comprehensive Income (Loss) at Beginning of Period	(323)		(330)
Other comprehensive income (loss) before reclassifications	8		8
Amounts reclassified from AOCI	6		16
Other comprehensive income (loss), tax, portion attributable to parent	(4)		(7)
Balance of Accumulated Other Comprehensive Income (Loss) at End of period	(313)		(313)
Other Comprehensive Income (Loss), Net of Tax	10		17
Unrealized Gain (Loss) On Investments [Member]
Accumulated other comprehensive income (loss)
Balance of Accumulated Other Comprehensive Income (Loss) at Beginning of Period	(5)		(1)
Other comprehensive income (loss) before reclassifications	10		3
Amounts reclassified from AOCI	0		0
Other comprehensive income (loss), tax, portion attributable to parent	0		3
Balance of Accumulated Other Comprehensive Income (Loss) at End of period	5		5
Other Comprehensive Income (Loss), Net of Tax	$ 10		$ 6