Consolidated Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Net income	$ 1,676	$ 1,495	$ 1,352
Other comprehensive income (loss), net of tax:
Unrecognized amounts on retirement benefits, net of tax of $7, $(28) and $(10)	16	(84)	(30)
Foreign currency translation adjustment	74	135	(10)
Unrealized gains (losses) on available-for-sale securities, net of tax of $178, $79 and $(279)	263	119	(419)
Unrealized gains (losses) on cash flow hedges, net of tax of $10, $5 and $(5)	13	8	(8)
Total other comprehensive income (loss), net of tax	366	178	(467)
Comprehensive income	2,042	1,673	885
Comprehensive income attributable to noncontrolling interests	40	23	21
Comprehensive income attributable to MEHC shareholders	$ 2,002	$ 1,650	$ 864