Long-Term Debt (Tables)

12 Months Ended

Dec. 31, 2016

Long-Term Debt.

Summary of debt

As of December 31, 2016 and 2015, long-term debt consisted of the following (in millions):

	December 31, 2016						December 31, 2015
		Outstanding Principal		Premium (Discount)		Long-Term Debt		Outstanding Principal		Premium (Discount)		Long-Term Debt
Partnership credit facility, due 2020 (1)	$	120.0	$	—	$	120.0	$	414.0	$	—	$	414.0
Company credit facility, due 2019 (2)		27.8		—		27.8		—		—		—
2.70% Senior unsecured notes due 2019		400.0		(0.3)		399.7		400.0		(0.4)		399.6
7.125% Senior unsecured notes due 2022		162.5		16.0		178.5		162.5		18.9		181.4
4.40% Senior unsecured notes due 2024		550.0		2.5		552.5		550.0		2.9		552.9
4.15% Senior unsecured notes due 2025		750.0		(1.1)		748.9		750.0		(1.2)		748.8
4.85% Senior unsecured notes due 2026		500.0		(0.7)		499.3		—		—		—
5.60% Senior unsecured notes due 2044		350.0		(0.2)		349.8		350.0		(0.2)		349.8
5.05% Senior unsecured notes due 2045		450.0		(6.6)		443.4		450.0		(6.9)		443.1
Other debt		—		—		—		0.2		—		0.2
Debt classified as long-term	$	3,310.3	$	9.6	$	3,319.9	$	3,076.7	$	13.1	$	3,089.8
Debt issuance cost (3)						(24.6)						(23.8)
Long-term debt, net of unamortized issuance cost					$	3,295.3					$	3,066.0

(1) Bears interest based on Prime and/or LIBOR plus an applicable margin. The effective interest rate was 2.3% and 1.8% at December 31, 2016 and 2015, respectively.

(2) Bears interest based on Prime and/or LIBOR plus an applicable margin. The effective interest rate was 3.4% at December 31, 2016.

Net of amortization of $9.0 million and $5.1 million at December 31, 2016 and 2015, respectively.

Schedule of Maturities of Long-term Debt

Maturities for the long-term debt as of December 31, 2016 are as follows (in millions):

2017	$	—
2018		—
2019		427.8
2020		120.0
2021		—
Thereafter		2,762.5
Subtotal		3,310.3
Add: net premium		9.6
Less: debt issuance cost		(24.6)
Long-term debt, net of unamortized issuance cost	$	3,295.3