|
Retirement Benefits Plans Retirement Benefits Plans - Defined Contribution Plans (Details 13) (USD $)
In Millions, unless otherwise specified |
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2013
|
Dec. 31, 2012
|
Dec. 31, 2011
|
|
| Defined Contribution Plans [Line Items] | |||
| Employer contributions to defined contribution plans | $ 121 | $ 74 | $ 65 |