Borrowings and Credit Arrangements (Tables)

6 Months Ended

Jun. 30, 2017

Debt Disclosure [Abstract]

Schedule of debt maturities

The debt maturity schedule for the significant components of our long-term debt obligations as of June 30, 2017 and December 31, 2016 is as follows:

in millions, except interest rates	Maturity Date	June 30, 2017			December 31, 2016
January 2017 5.125% Notes	January 2017	$	—		$	250
October 2018 2.650% Notes	October 2018	600			600
January 2020 6.000% Notes	January 2020	850			850
May 2020 2.850% Notes	May 2020	600			600
May 2022 3.375% Notes	May 2022	500			500
May 2025 3.850% Notes	May 2025	750			750
October 2023 4.125% Notes	October 2023	450			450
November 2035 6.250% Notes	November 2035	350			350
January 2040 7.375% Notes	January 2040	300			300
August 2018 Term Loan	August 2018	—			150
August 2020 Term Loan	2018-2020	400			600
Debt discount	2018-2040	(7		)	(8		)
Deferred financing costs	2018-2040	(22		)	(24		)
Interest rate swaps	2020-2023	45			51
Capital lease obligation	2018-2020	1			1
Long-term debt		$	4,817		$	5,420

Note: The table above does not include unamortized amounts related to interest rate contracts designated as cash flow hedges.