Financial Instruments - Derivative Hedging Activities (Details) - USD ($) $ in Millions |
3 Months Ended | |
---|---|---|
Mar. 31, 2019 |
Mar. 31, 2018 |
|
Derivative Instruments and Hedging Activities Disclosures [Line Item] | ||
Interest expense | $ (100.4) | $ (94.8) |
Realized gain reclassified into earnings | (0.1) | |
Interest Expense | Interest Rate Swap | ||
Derivative Instruments and Hedging Activities Disclosures [Line Item] | ||
Realized gain reclassified into earnings | 0.1 | |
Interest Expense | Interest Rate Locks | ||
Derivative Instruments and Hedging Activities Disclosures [Line Item] | ||
Realized gain reclassified into earnings | $ 0.1 | |
Cash Flow Hedging | Interest Expense | Interest Rate Locks | ||
Derivative Instruments and Hedging Activities Disclosures [Line Item] | ||
Gain (loss) reclassified from AOCI into earnings | (0.5) | |
Fair Value Hedging | Interest Expense | Interest Rate Swap | ||
Derivative Instruments and Hedging Activities Disclosures [Line Item] | ||
Gain (loss) reclassified from AOCI into earnings | $ 0.9 |