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Share-Based Payments (Details Textual) $ / shares in Units, $ in Millions | 12 Months Ended |
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Dec. 31, 2019 USD ($) Plan Increment $ / shares shares | Dec. 31, 2018 USD ($) $ / shares shares | Dec. 31, 2017 USD ($) $ / shares shares | Dec. 31, 2013 Increment | Jun. 30, 2017 shares
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |  |
Shares issued under ESPP |  | 6,200,000 |  |  |  |  |
Share-Based Payments (Textual) |  |  |  |  |  |  |
Unrecognized compensation cost related to unvested share-based compensation | $ |  | $ 210.4 |  |  |  |  |
Weighted-average period to recognize the cost of unvested awards |  | 1 year 10 months 24 days |  |  |  |  |
Number of share-based compensation plans pursuant to which awards are currently being made | Plan |  | 3 |  |  |  |  |
Number of shares granted under stock options |  | 0 |  | 0 | 0 |  |
Total intrinsic value of options exercised | $ |  | $ 4.2 |  | $ 4.0 | $ 3.4 |  |
Aggregate intrinsic values of options outstanding | $ |  | $ 2.9 |  |  |  |  |
Weighted average remaining contractual term for options outstanding |  | 2 months 12 days |  |  |  |  |
Market stock units |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |  |
Number of equal annual increments | Increment |  | 3 |  |  |  | 4 |
Percentage of earnings of the target number of units granted based on actual stock performance (Minimum) |  | 0.00% |  |  |  | 0.00% |
Percentage of earnings of the target number of units granted based on actual stock performance (Maximum) |  | 200.00% |  |  |  | 150.00% |
Number of shares granted | [1] | 147,000 |  |  |  |  |
Number of days for calculation of average closing stock price |  | 30 days |  |  |  |  |
Total fair value of vested awards | $ |  | $ 32.5 |  | $ 26.9 | $ 31.4 |  |
Weighted average grant date fair value | $ / shares |  | $ 378.08 | [1] | $ 378.85 | $ 382.59 |  |
Cash settled performance units |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |  |
Number of equal annual increments | Increment |  | 3 |  |  |  |  |
Percentage of earnings of the target number of units granted based on actual stock performance (Minimum) |  | 0.00% |  |  |  |  |
Percentage of earnings of the target number of units granted based on actual stock performance (Maximum) |  | 200.00% |  |  |  |  |
Number of shares granted |  | 0 |  |  |  |  |
Number of days for calculation of average closing stock price |  | 30 days |  |  |  |  |
Cash in settlement of CSPS awards upon vesting | $ |  | $ 10.6 |  | $ 15.1 | $ 16.6 |  |
Performance units |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |  |
Number of equal annual increments | Increment |  | 3 |  |  |  |  |
Percentage of earnings of the target number of units granted based on actual stock performance (Minimum) |  | 0.00% |  |  |  |  |
Percentage of earnings of the target number of units granted based on actual stock performance (Maximum) |  | 200.00% |  |  |  |  |
Number of shares granted |  | 0 |  |  |  |  |
Number of days for calculation of average closing stock price |  | 30 days |  |  |  |  |
Cash in settlement of CSPS awards upon vesting | $ |  | $ 10.4 |  | $ 17.0 | 11.5 |  |
Performance stock units settled in stock |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |  |
Percentage of earnings of the target number of units granted based on actual stock performance (Minimum) |  | 0.00% |  |  |  |  |
Percentage of earnings of the target number of units granted based on actual stock performance (Maximum) |  | 200.00% |  |  |  |  |
Number of shares granted |  |  |  | 77,000,000 |  |  |
Weighted average grant date fair value | $ / shares | [1] |  |  | $ 316.28 |  |  |
Performance stock units settled in cash |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |  |
Percentage of earnings of the target number of units granted based on actual stock performance (Minimum) |  | 0.00% |  |  |  |  |
Percentage of earnings of the target number of units granted based on actual stock performance (Maximum) |  | 200.00% |  |  |  |  |
Number of shares granted |  | 63,000,000 |  |  |  |  |
Number of days for calculation of average closing stock price |  | 30 days |  |  |  |  |
Time-vested restricted stock units |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |  |
Number of shares granted | [2] | 602,000 |  |  |  |  |
Total fair value of vested awards | $ |  | $ 131.5 |  | $ 111.7 | $ 100.0 |  |
Weighted average grant date fair value | $ / shares |  | $ 304.44 | [2] | $ 316.32 | $ 293.41 |  |
Director | Time-vested restricted stock units |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |  |
Number of shares granted | [2] | 15,000 |  |  |  |  |
Directors Plan |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |  |
Total number of shares of common stock for issuance |  | 1,600,000 |  |  |  |  |
Ratio of total number of shares reserved under the plan |  | 1.5-to-1 |  |  |  |  |
2017 Omnibus Equity Plan |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |  |
Ratio of total number of shares reserved under the plan |  | 1.5-to-1 |  |  |  |  |
Omnibus Plan number of shares authorized |  |  |  |  |  |  | 8,000,000.0
[1] | MSUs granted during 2019 include awards granted in conjunction with our annual awards made in February 2019 and MSUs granted in conjunction with the hiring of employees. These grants reflect the target number of shares eligible to be earned at the time of grant. MSUs granted in 2019 also reflect an adjustment based upon the final performance multiplier in relation to shares granted in 2018, 2017 and 2016.
[2] | RSUs granted in 2019 primarily represent RSUs granted in conjunction with our annual awards made in February 2019 and awards made in conjunction with the hiring of new employees. RSUs granted in 2019 also include approximately 15,000 RSUs granted to our Board of Directors.

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