Debt (Tables)

12 Months Ended

Dec. 31, 2015

Debt Disclosure [Abstract]

Carrying value of outstanding debt

The following table summarizes the carrying value of our outstanding debt:

	Coupon		Carrying Value as of		Effective		Carrying Value as of		Effective
	Rate		December 31, 2015		Interest Rate		December 31, 2014		Interest Rate
	(In millions, except percentages)
Long-Term Debt
Floating Rate Notes:
Senior notes due 2017	LIBOR plus 0.20%		$	450	0.586	%	$	450	0.560	%
Senior notes due 2019	LIBOR plus 0.48%		400		0.825	%	400		0.811	%
Fixed Rate Notes:
Senior notes due 2017	1.350	%	1,000		1.456	%	1,000		1.456	%
Senior notes due 2019	2.200	%	1,148		2.346	%	1,148		2.346	%
Senior notes due 2020	3.250	%	499		3.389	%	498		3.389	%
Senior notes due 2021	2.875	%	749		2.993	%	749		2.993	%
Senior notes due 2022	2.600	%	999		2.678	%	999		2.678	%
Senior notes due 2024	3.450	%	749		3.531	%	749		3.531	%
Senior notes due 2042	4.000	%	744		4.114	%	743		4.114	%
Total senior notes			6,738				6,736
Hedge accounting fair value adjustments			41				22
Other indebtedness			—				19
Total long-term debt			$	6,779			$	6,777
Short-Term Debt
Senior notes due 2015	0.700	%	—		—	%	250		0.820	%
Senior notes due 2015	1.625	%	—		—	%	600		1.805	%
Total short-term debt			—				850
Total Debt			$	6,779			$	7,627

Schedule of expected future principal maturities

Expected future principal maturities as of December 31, 2015 are as follows (in millions):

Fiscal Years:
	2016	$	—
	2017	1,450
	2018	—
	2019	1,550
	2020	500
	Thereafter	3,250
		$	6,750