Long-lived Assets - Intangible Assets Subject to Amortization, Net (Details) - USD ($) $ in Millions |
Mar. 31, 2019 |
Dec. 31, 2018 |
---|---|---|
Gross carrying amount | $ 1,701.5 | $ 1,696.5 |
Accumulated amortization | (580.9) | (530.8) |
Total | 1,120.6 | 1,165.7 |
Customer relationships | ||
Gross carrying amount | 1,513.8 | 1,509.7 |
Accumulated amortization | (551.5) | (504.7) |
Licenses and other | ||
Gross carrying amount | 187.7 | 186.8 |
Accumulated amortization | $ (29.4) | $ (26.1) |