Earnings Per Share (Narrative) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Jun. 30, 2015
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)	32,500,000	13,700,000	11,600,000	17,900,000
Authorized amount, increase					$ 4,000,000,000.000
Aggregate authorized amount					$ 17,500,000,000.000
Shares repurchased under share repurchase program (in shares)	7,100,000		24,500,000
Shares repurchased under share repurchase program	$ 815,400,000		$ 2,849,000,000
Remaining authorized repurchase amount under stock purchase program	$ 4,297,000,000		$ 4,297,000,000
Purchased Put
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Put options outstanding	0		0