Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Consolidated Statements of Comprehensive Income [Abstract]
Net income	$ 1,186	$ 1,257	$ 3,679	$ 3,377
Financial derivatives:
Gain (loss) on forward-starting interest rate swaps	(68)	0	12	(17)
Gain on cross-currency swaps	32	0	229	0
Reclassification adjustment included in net income	5	0	(148)	0
Income tax expense (benefit)	(8)	0	56	(4)
Financial derivatives, net of tax	(23)	0	37	(13)
Unrealized gains (losses) on available-for-sale securities:
Unrealized holding gains (losses) arising during the period	(1)	0	(1)	1
Unrealized gains (losses) on available-for-sale securities, net of tax	(1)	0	(1)	1
Defined pension and other postretirement benefit plans:
Reclassification adjustment for amortization of prior service cost included in net income	1	1	2	3
Net actuarial loss arising during the period	0	0	0	(16)
Reclassification adjustment for net actuarial loss included in net income	6	1	19	6
Defined pension and other postretirement benefit plans, before tax	7	2	21	(7)
Income tax expense (benefit)	2	1	6	(7)
Defined pension and other postretirement benefit plans, net of tax	5	1	15	0
Foreign currency translations adjustment:
Unrealized loss arising during the period	(55)	(554)	(406)	(594)
Foreign currency translations, net of tax	(55)	(554)	(406)	(594)
Total other comprehensive loss	(74)	(553)	(355)	(606)
Comprehensive income	1,112	704	3,324	2,771
Comprehensive (income) loss attributable to non-controlling interests	(1)	1	2	4
Comprehensive income attributable to the Company shareholders	$ 1,111	$ 705	$ 3,326	$ 2,775