|
Consolidated Statements of Income (Parenthetical) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | |
|---|---|---|
|
Mar. 31, 2015
|
Mar. 31, 2014
|
|
| Consolidated Statements of Income [Abstract] | ||
| Earnings allocated to participating share awards | $ 11 | $ 12 |