Debt (Tables)

3 Months Ended

Jun. 30, 2017

Debt Disclosure [Abstract]

Schedule of Components of Debt

The following table summarizes components of our debt:

(In millions, except percentages)	June 30, 2017			March 31, 2017			Effective Interest Rate
2.75% Senior Notes due June 15, 2017	$	—		$	600		2.79	%
Senior Term Loan A-1 due May 10, 2019	800			1,000			LIBOR plus (1)
Senior Term Loan A-2 due August 1, 2019	800			800			LIBOR plus (1)
Senior Term Loan A-3 due August 1, 2019	200			200			LIBOR plus (1)
4.2% Senior Notes due September 15, 2020	750			750			4.25	%
2.5% Convertible Senior Notes due April 1, 2021	500			500			3.76	%
Senior Term Loan A-5 due August 1, 2021	500			1,710			LIBOR plus (1)
2.0% Convertible Senior Notes due August 15, 2021	1,250			1,250			2.66	%
3.95% Senior Notes due June 15, 2022	400			400			4.05	%
5.0% Senior Notes due April 15, 2025	1,100			1,100			5.23	%
Total principal amount	6,300			8,310
Less: Unamortized discount and issuance costs	(98		)	(124		)
Total debt	6,202			8,186
Less: Current portion	—			(1,310		)
Total long-term portion	$	6,202		$	6,876

(1) The senior term facilities bear interest at a rate equal to the London Interbank Offered Rate (“LIBOR”) plus a margin of 1.50% to 1.75% based on the current debt rating of our non-credit-enhanced, senior unsecured long-term debt and our underlying loan agreements.

Schedule of Maturities of Long-term Debt

The future maturities of debt by fiscal year are as follows as of June 30, 2017:

(In millions)	June 30, 2017
Remainder of 2018	$	—
2019	—
2020	1,800
2021	1,250
2022	1,750
Thereafter	1,500
Total future maturities of debt	$	6,300