Fair value is defined as the price that would be received from the sale of an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date (the exit price).

ASC 820, Fair Value Measurements and Disclosures, sets forth a fair value hierarchy that categorizes inputs to valuation techniques used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities and lowest priority to unobservable inputs. Categorization within this hierarchy is based upon the lowest level of input that is significant to the fair value measurement.

Fair value measurements are classified as Level 1 if their value is observable in an active market. Such instruments are valued by reference to unadjusted quoted prices for identical assets or liabilities in active markets where the quoted price is readily available, and the price represents actual and regularly occurring market transactions. An active market is one in which transactions occur with sufficient volume and frequency to provide pricing information on an ongoing basis.

Fair value measurements classified as Level 2 are valued using quoted prices for identical instruments in markets that are not considered to be active, or quoted prices for similar assets or liabilities in active markets, or valuation techniques in which all significant inputs are observable or can be corroborated by observable market data for substantially the entire contractual term of the financial asset or liability.

Fair value measurements are classified as Level 3 if their valuation incorporates significant inputs that are not based on observable market data (unobservable inputs). Such inputs are generally determined based on observable inputs of a similar nature, historical observations on the level of the inputs, or other analytical techniques.

We evaluate our hierarchy disclosures each quarter and depending on various factors, it is possible that an asset or liability may be classified differently from period to period. Changes in the type of inputs may result in a reclassification for certain assets. We have not historically had changes in classifications and do not expect that changes in classifications between levels will be frequent.

The fair value of short-term financial instruments such as cash and cash equivalents, accounts receivable, escrow deposits, loans receivable, accounts payable, distributions payable, line of credit payable and commercial paper borrowings, and other liabilities approximate their carrying value in the accompanying consolidated balance sheets, due to their short-term nature. The aggregate fair value of our term loans approximates carrying value due to the frequent repricing of the variable interest rate charged on the borrowing.


	June 30, 2023				December 31, 2022
	Carrying value		Fair value		Carrying value		Fair value
Mortgages payable (1)	$	836.3	$	812.5	$	842.3	$	810.4
Notes and bonds payable (2)	$	16,383.2	$	14,553.6	$	14,114.2	$	12,522.8

(1)Excludes non-cash net premiums recorded on the mortgages payable. The unamortized balance of these net premiums was $6.0 million at June 30, 2023, and $12.4 million at December 31, 2022. Also excludes deferred financing costs of $0.7 million at June 30, 2023, and $0.8 million at December 31, 2022.

(2)Excludes non-cash net premiums recorded on notes payable. The unamortized balance of the net premiums was $168.8 million at June 30, 2023, and $224.6 million at December 31, 2022. Also excludes deferred financing costs of $71.8 million and basis adjustment on interest rate swaps designated as fair value hedges of $4.6 million at June 30, 2023, and $60.7 million of deferred financing costs at December 31, 2022.

The estimated fair values of our mortgages payable and private senior notes payable have been calculated by discounting the future cash flows using an interest rate based upon the relevant forward interest rate curve, plus an applicable credit-adjusted spread. Because this methodology includes unobservable inputs that reflect our own internal assumptions and calculations, the measurement of estimated fair values related to our mortgages payable is categorized as level three on the three-level valuation hierarchy.

The estimated fair values of our publicly-traded senior notes and bonds payable are based upon indicative market prices and recent trading activity of our senior notes and bonds payable. Because this methodology includes inputs that are less observable by the public and are not necessarily reflected in active markets, the measurement of the estimated fair values related to our notes and bonds payable is categorized as level two on the three-level valuation hierarchy.

For derivative assets and liabilities, we may utilize interest rate swaps, interest rate swaptions, and forward-starting swaps to manage interest rate risk, and cross-currency swaps, currency exchange swaps, and foreign currency forwards to manage foreign currency risk. The valuation of these instruments is determined using widely accepted valuation techniques, including discounted cash flow analysis on the expected cash flows of each derivative. This analysis reflects the contractual terms of the derivatives, including the period to maturity, and uses observable market-based inputs, including interest rate curves, spot and forward rates, as well as option volatility.

Derivative fair values also include credit valuation adjustments to appropriately reflect both our own nonperformance risk and the respective counterparty’s nonperformance risk in the fair value measurements. In adjusting the fair value of our derivative contracts for the effect of nonperformance risk, we have considered the impact of netting and any applicable credit enhancements, such as collateral postings, thresholds, mutual puts, and guarantees.

Although we have determined that the majority of the inputs used to value our derivatives fall within level two on the three-level valuation hierarchy, the credit valuation adjustments associated with our derivatives utilize level three inputs, such as estimates of current credit spreads, to evaluate the likelihood of default by ourselves and our counterparties. However, at June 30, 2023, and December 31, 2022, we assessed the significance of the impact of the credit valuation adjustments on the overall valuation of our derivative positions and determined that the credit valuation adjustments are not significant to the overall valuation of our derivatives. As a result, we determined that our derivative valuations in their entirety are classified as level two.

Certain financial and nonfinancial assets and liabilities are measured at fair value on a non-recurring basis and are subject to fair value adjustments only under certain circumstances, such as when an impairment write-down occurs.

Depending on impairment triggering events during the applicable period, impairments are typically recorded for properties sold, in the process of being sold, vacant, in bankruptcy, or experiencing difficulties with collection of rent.


	Three months ended June 30,			Six months ended June 30,
		2023		2022		2023		2022
Carrying value prior to impairment		$	97.0	$	64.5	$	125.5	$	98.2
Less: total provisions for impairment		(29.8)		(7.7)		(43.0)		(14.7)
Carrying value after impairment		$	67.2	$	56.8	$	82.5	$	83.5

The valuation of impaired assets is determined using valuation techniques including discounted cash flow analysis, analysis of recent comparable sales transactions and purchase offers received from third parties, which are Level 3 inputs. We may consider a single valuation technique or multiple valuation techniques, as appropriate, when estimating the fair value of its real estate. Estimating future cash flows is highly subjective and estimates can differ materially from actual results.