Consolidated Statement of Comprehensive Income (Parenthetical) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Statement of Income and Comprehensive Income [Abstract]
Foreign currency translation, net of tax (expense)/benefit	$ (33)	$ 21	$ (16)	$ 84
Current year actuarial gain (loss), net of tax (expense)/benefit	(2)	0	(8)	0
Amortization of actuarial (gain) loss, net of tax (expense)/benefit	(60)	(59)	(120)	(112)
Current year prior service credit (cost), net of tax (expense)/benefit	0	0	2	0
Amortization of prior service (credit) cost, net of tax (expense)/benefit	4	3	8	6
Amortization of transition (asset) obligation, net of tax (expense)/benefit	0	0	0	0
Derivative financial instruments, Gains (losses) deferred, net of tax (expense)/benefit	0	16	16	6
Derivative financial instruments, (Gains) losses reclassified to earnings, net of tax (expense)/benefit	(2)	(5)	(1)	0
Available-for-sale securities, Gains (losses) deferred, net of tax (expense)/benefit	4	(2)	(5)	(5)
Available-for-sale securities, (Gains) losses reclassified to earnings, net of tax (expense)/benefit	$ 0	$ 0	$ 0	$ 0