Borrowing Arrangements (Fair Value Adjustment) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2014
Debt Disclosure [Abstract]
Unamortized fair value adjustment related to long-term debt	$ 41.9
Aggregate amortization of the fair value adjustment	20.6vtr_AmortizationOfFairValueAdjustment
Estimated aggregate amortization of fair value adjustment related to long-term debt (reduction of interest expense) for each of the next five years:
2015	13.6
2016	9.2
2017	5.4
2018	2.1
2019	$ 1.5

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- Definition

Amortization of Fair Value Adjustment

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No definition available.

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- Definition

Estimated amortization related to the fair value adjustment of long term debt expected to be recognized during year five of the five succeeding fiscal years.

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No definition available.

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- Definition

Estimated amortization related to the fair value adjustment of long term debt expected to be recognized during year four of the five succeeding fiscal years.

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No definition available.

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- Definition

Estimated amortization related to the fair value adjustment of long term debt expected to be recognized during year one of the five succeeding fiscal years.

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No definition available.

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- Definition

Estimated amortization related to the fair value adjustment of long term debt expected to be recognized during year three of the five succeeding fiscal years.

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No definition available.

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- Definition

Estimated amortization related to the fair value adjustment of long term debt expected to be recognized during year two of the five succeeding fiscal years.

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No definition available.

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- Definition

Represents the unamortized fair value adjustment related to long-term debt assumed in an acquisition.

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No definition available.

+ Details

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