Long-lived Assets (Schedule of Intangible Assets Subject to Amortization, Net) (Details) - USD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2014 |
Dec. 31, 2013 |
|
| Gross carrying amount | $ 12,377.9 | $ 8,404.8 |
| Accumulated amortization | (3,188.1) | (2,609.4) |
| Net carrying amount | 9,189.8 | 5,795.4 |
| Customer Relationships [Member] | ||
| Gross carrying amount | 12,142.5 | 8,116.7 |
| Accumulated amortization | (3,056.3) | (2,458.4) |
| Net carrying amount | 9,086.2 | 5,658.3 |
| Other Intangible Assets [Member] | ||
| Gross carrying amount | 235.4 | 288.1 |
| Accumulated amortization | (131.8) | (151.0) |
| Net carrying amount | $ 103.6 | $ 137.1 |
| Minimum [Member] | Customer Relationships [Member] | ||
| Estimated useful life | 4 years | |
| Minimum [Member] | Other Intangible Assets [Member] | ||
| Estimated useful life | 2 years | |
| Maximum [Member] | Customer Relationships [Member] | ||
| Estimated useful life | 15 years | |
| Maximum [Member] | Other Intangible Assets [Member] | ||
| Estimated useful life | 15 years |