Borrowings and Credit Arrangements (Tables)

3 Months Ended

Mar. 31, 2018

Debt Disclosure [Abstract]

Summary Of Term Loan And Revolving Credit Facility Agreement Compliance With Debt Covenants [Table Text Block]

	Covenant Requirement	Actual
	as of March 31, 2018	as of March 31, 2018
Maximum leverage ratio (1)	3.5 times	2.2 times

(1) Ratio of total debt to consolidated EBITDA, as defined by the credit agreement, for the preceding four consecutive fiscal quarters.

Schedule of debt maturities

(in millions, except interest rates)	Issuance Date	Maturity Date	As of						Semi-annual Coupon Rate
			March 31, 2018			December 31, 2017
October 2018 Notes	August 2013	October 2018	—			†			2.650	%
January 2020 Notes	December 2009	January 2020	850			850			6.000	%
May 2020 Notes	May 2015	May 2020	600			600			2.850	%
May 2022 Notes	May 2015	May 2022	500			500			3.375	%
October 2023 Notes	August 2013	October 2023	450			450			4.125	%
May 2025 Notes	May 2015	May 2025	750			750			3.850	%
March 2028 Notes	February 2018	March 2028	1,000			—			4.000	%
November 2035 Notes	November 2005	November 2035	350			350			7.000	%
January 2040 Notes	December 2009	January 2040	300			300			7.375	%
Unamortized Debt Issuance Discount		2020 - 2040	(14		)	(6		)
Unamortized Deferred Financing Costs		2020 - 2040	(19		)	(18		)
Unamortized Gain on Fair Value Hedges		2020 - 2023	35			38
Capital Lease Obligation		Various	1			1
Long-term debt			$	4,803		$	3,815

^†As of December 31, 2017, $600 millionunder the October 2018 Notes was outstanding and classified as short-term debt.

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