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Notes Payable (Scheduled Repayments On Outstanding Debt) (Details) $ in Millions	Mar. 31, 2017 USD ($)
2017	$ 245.8
2018	173.8
2019	643.2
2020	(1.1)	[1]
2021	249.1
Thereafter	1,139.5
Total notes payable	$ 2,450.3
Weighted Average Interest Rate	4.40%
Maturities Due In 2017 [Member]
Weighted Average Interest Rate	5.80%
Maturities Due In 2018 [Member]
Weighted Average Interest Rate	1.40%
Maturities Due In 2019 [Member]
Weighted Average Interest Rate	5.40%
Maturities Due In 2020 [Member]
Weighted Average Interest Rate	0.00%
Maturities due in 2021 [Member]
Weighted Average Interest Rate	4.80%
Maturities Due Thereafter [Member]
Weighted Average Interest Rate	4.00%
[1] Includes amortization of debt discounts and debt issuance costs, net of scheduled principal payments.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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