Consolidated Statement of Comprehensive Income (Parenthetical) (Parentheticals) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Statement of Comprehensive Income [Abstract]
Foreign currency translation, tax (provision)/benefit	$ (5)	$ (44)	$ (60)	$ (52)
Pension and other postretirement benefits, Current year actuarial gain (loss), tax (provision)/benefit	(21)	(2)	(35)	(7)
Pension and other postretirement benefits, Amortization of actuarial (gain) loss, tax (provision)/benefit	(56)	(44)	(168)	(132)
Pension and other postretirement benefits, Current year prior service credit (cost), tax (provision)/benefit	(1)	(1)	(1)	(1)
Pension and other postretirement benefits, Amortization of prior service (credit) cost, tax (provision)/benefit	5	3	14	10
Derivative financial instruments, Gains (losses) deferred, tax (provision)/benefit	7	17	9	33
Derivative financial instruments, (Gains) losses reclassified to earnings, tax (provision)/benefit	(11)	1	(40)	7
Available-for-sale securities, Gains (losses) deferred, tax (provision)/benefit	10	5	10	(6)
Available-for-sale securities, (Gains) losses reclassified to earnings, tax (provision)/benefit	$ 9	$ 7	$ 10	$ 11