Consolidated Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Net income	$ 444	$ 379
Other comprehensive (loss) income, net of tax:
Unrecognized amounts on retirement benefits, net of tax of $16 and $(2)	47	(5)
Foreign currency translation adjustment	(212)	85
Unrealized gains on available-for-sale securities, net of tax of $20 and $59	27	89
Unrealized gains (losses) on cash flow hedges, net of tax of $10 and $(11)	16	(15)
Total other comprehensive (loss) income, net of tax	(122)	154
Comprehensive income	322	533
Comprehensive income attributable to noncontrolling interests	6	4
Comprehensive income attributable to MEHC shareholders	$ 316	$ 529