Equity-Based Compensation Information Related to Stock Options (Details) - USD ($) shares in Millions, $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 31, 2013 |
|
| Information Related to Stock Options [Abstract] | |||
| Pretax expense for stock options | $ 12 | $ 12 | $ 11 |
| After-tax expense for stock options | 8 | 8 | 7 |
| Proceeds from stock options exercised | 52 | 54 | 121 |
| Income tax benefit related to stock options exercised | |||
| Tax benefit classified in operating activities in the Consolidated Statements of Cash Flows | 4 | 4 | 3 |
| Excess tax benefit classified in financing activities in the Consolidated Statements of Cash Flows | 1 | 15 | 22 |
| Intrinsic value of stock options exercised | 44 | 55 | 102 |
| Total fair value of stock options vesting | $ 12 | $ 12 | $ 11 |
| Stock options exercised, shares | 1.4 | 1.5 | 3.6 |
| Non-vested stock option compensation expense not yet recognized | $ 11 | ||
| Non-vested stock options weighted-average period for total compensation expense to be recognized | 1 year 8 months | ||
| X | ||||||||||
- Definition Excess tax benefit for stock options exercised classified in Consolidated Statements of Cash Flows excluding RSU's No definition available.
|
| X | ||||||||||
- Definition Income tax benefit related to stock options exercised. No definition available.
|
| X | ||||||||||
- Definition Information Related to Stock Options [Abstract] No definition available.
|
| X | ||||||||||
- Definition Share-based compensation arrangement by share-based payment award, options vesting, fair value. No definition available.
|
| X | ||||||||||
- Definition Tax benefit for stock options exercised classified in operating activities excluding RSU's. No definition available.
|
| X | ||||||||||
- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The amount of expense, net of income tax, recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. No definition available.
|
| X | ||||||||||
- Definition Unrecognized cost of unvested share-based compensation awards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Number of share options (or share units) exercised during the current period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|