|
Income Taxes Income Tax Expense & Effective Tax Rate (Details) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | |
|---|---|---|
|
Mar. 31, 2015
|
Mar. 31, 2014
|
|
| Income Tax Disclosure [Abstract] | ||
| Income tax expense | $ 61 | $ 69 |
| Effective tax rate | 17.00% | 18.00% |
| Cash Taxes Paid (including discontinued operations) | $ 65 | $ 71 |