8.Notes Payable

A. General

Our senior unsecured notes and bonds consist of the following, sorted by maturity date (dollars in millions):

	March 31,			December 31,

	2018			2017
2.000% notes, issued in October 2012 and due in January 2018	$	-		$	350
5.750% notes, issued in June 2010 and due in January 2021	250			250
3.250% notes, $450 issued in October 2012 and $500 issued in December 2017, both due in October 2022	950			950
4.650% notes, issued in July 2013 and due in August 2023	750			750
3.875% notes, issued in June 2014 and due in July 2024	350			350
4.125% notes, $250 issued in September 2014 and $400 issued in March 2017, both due in October 2026	650			650
3.000% notes, issued in October 2016 and due in January 2027	600			600
3.650% notes, issued in December 2017 and due in January 2028	550			550
5.875% bonds, $100 issued in March 2005 and $150 issued in June 2011, both due in March 2035	250			250
4.650% notes, $300 issued in March 2017 and $250 issued in December 2017, both due in March 2047	550			550

Total principal amount	4,900			5,250
Unamortized net original issuance premiums and deferred financing costs	(20		)	(20		)

	$	4,880		$	5,230

The following table summarizes the maturity of our notes and bonds payable as of March 31, 2018, excluding net unamortized original issuance premiums and deferred financing costs (dollars in millions):

Year of Maturity	Principal
2018	$	-
2019	-
2020	-
2021	250
2022	950
Thereafter	3,700

Totals	$	4,900

As of March 31, 2018, the weighted average interest rate on our notes and bonds payable was 4.1% and the weighted average remaining years until maturity was 9.7 years.

B. Note Repayment

In January 2018, we repaid our $350.0 million of outstanding 2.000% notes, plus accrued and unpaid interest upon maturity.

C. Note Issuances

In March 2017, we issued $300 million of 4.650% senior unsecured notes due 2047, or the 2047 Notes, and $400 million of 4.125% senior unsecured notes due 2026, or the 2026 Notes. The public offering price for the 2047 Notes was 99.97% of the principal amount for an effective yield to maturity of 4.65%. The public offering price for the 2026 Notes was 102.98% of the principal amount for an effective yield to maturity of 3.75%. The 2026 Notes constituted a further issuance of, and formed a single series with, the $250 million aggregate principal amount of senior notes due 2026, issued in September 2014. The net proceeds of approximately $705.2 million from the offerings were used to repay borrowings outstanding under our credit facility to fund investment opportunities, and for other general corporate purposes.