Total Equity (Dividends and Share Repurchases) (Details) - USD ($) $ / shares in Units, $ in Millions |
3 Months Ended | 12 Months Ended | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2017 |
Sep. 30, 2017 |
Jun. 30, 2017 |
Mar. 31, 2017 |
Dec. 31, 2016 |
Sep. 30, 2016 |
Jun. 30, 2016 |
Mar. 31, 2016 |
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
|
Share Repurchase Program | |||||||||||
Repurchases of common stock | $ 1,250 | $ 2 | $ 3,750 | $ 3,500 | |||||||
Capital Plans | |||||||||||
Dividends declared per common share | $ 0.25 | $ 0.25 | $ 0.2 | $ 0.2 | $ 0.2 | $ 0.2 | $ 0.15 | $ 0.15 | $ 0.9 | $ 0.7 | $ 0.55 |
2017 Capital Plan | |||||||||||
Capital Plans | |||||||||||
Authorized repurchase amount of outstanding common stock | $ 5,000 | $ 5,000 | |||||||||
Stock repurchase program start date | Jul. 01, 2017 | ||||||||||
Stock repurchase program expiration date | Jun. 30, 2018 | ||||||||||
Dividends declared per common share | $ 0.25 | $ 0.25 | |||||||||
2016 Capital Plan | |||||||||||
Capital Plans | |||||||||||
Authorized repurchase amount of outstanding common stock | $ 3,500 | $ 3,500 |