Schedule II - Condensed Financial Information, Balance Sheets (Details) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014	Jun. 30, 2014	Dec. 31, 2013
Assets
Cash and cash equivalents	$ 1,969	$ 1,420	$ 1,967	$ 2,795
Other assets	2,722	2,683
Total assets	57,132	55,896
Liabilities:
Short-term debt	150	147
Long-term debt, carrying value	5,046	5,005
Total liabilities	45,753	45,017
Shareholders Equity:
Common stock (shares issued, 296; authorized, 600)	74	74
Additional paid-in capital	2,835	2,769
Accumulated other comprehensive loss	(1,125)	(936)
Retained earnings	11,178	10,289
Less treasury stock, at cost	(1,672)	(1,422)
Total shareholders' equity	11,290	10,774
Total liabilities and equity	$ 57,132	$ 55,896