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Debt and Credit Facilities (Tables)

6 Months Ended

Jun. 30, 2018

Long-term Debt, Unclassified [Abstract]

Schedule of Long-term Debt Instruments

Summary of Total Debt				June 2018			December 2017
Senior unsecured notes:
	Rate		Due
	1.300%		April 1, 2018	$	—		$	600
	1.800%		January 15, 2019	499			499
	2.000%		March 8, 2019	749			748
	4.375%		January 15, 2020	498			498
	2.625%		March 15, 2021	747			746
	3.375%		May 15, 2024	583			598
	3.375%		November 1, 2025	745			745
	3.500%		March 15, 2026	989			988
	3.650%		March 7, 2028	595			—
	4.100%		April 1, 2043	391			391
	4.375%		May 15, 2044	395			394
	4.625%		March 15, 2046	980			980
Other				31			35
Total debt				$	7,202		$	7,222
Less current maturities of debt				1,277			632
Total long-term debt				$	5,925		$	6,590
Unamortized debt issuance costs				$	41		$	39
Available borrowing capacity				$	1,552		$	1,547
Fair value of senior unsecured notes				$	7,119		$	7,521

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- Definition

Tabular disclosure of information pertaining to short-term and long-debt instruments or arrangements, including but not limited to identification of terms, features, collateral requirements and other information necessary to a fair presentation.

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